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1
You, J. S., et Wen Fang Wu. « Designing and Development of Automatic Classification Equipment in Resource Recycling ». Applied Mechanics and Materials 251 (décembre 2012) : 71–74. http://dx.doi.org/10.4028/www.scientific.net/amm.251.71.
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Creat and keep a good living environment is everyone’s responsibility. However, in the high-stressed society, people are driven to be more effective, many disposable products come into being, such as, plastic bottles, plastic products, styrofoam, etc. They are common in low price, and handy enough. Meanwhile, Users are tend to foster the habit of throwing waster about ,which is not only a waste of resources, but also a serious environmental problem. Therefore, it is quite important to classify the garbage and recycle the resources, and transfer the "throwing after using immediately" society into a sustainable society. Hence, the interdisciplinary cooperation method in the design and engineering field to design and develop the productis employed in this thesis.Then, based on the technical feasibility evaluation and the production of the prototype, functions of the products have been checked and achieved. Thus, it can be used to recycle the resources and reate a high quality living environment, further promote the new concept of environmental protection.
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Du, Hong Pu, Yuan Ming Dou et Cheng Ying Qi. « Application of Mine Water for Water-Source Heat Pump System ». Applied Mechanics and Materials 291-294 (février 2013) : 1701–7. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.1701.
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Mine water and mine return air is good for the renewable energy due to heat storage underground, and the recycling has been a new technology of the energy utilization in water source heat pump system. Utilizing the waster heat of coal mine is beneficial in reducing the coal consumption of winter heating boiler or even replacing it completely. Comprehensive analysis the research situation and the project example, this paper points out that the technical of mine water applied for water-source heat pump system is feasibility in the practical project and theory in view of advantages, like energy saving, environmental protection, high efficiency and short payback period, etc. Therefore, application of mine water for water-source heat pump system is a new advanced energy-saving technology.
3
Jin, Yanming, Zhuonan Li, Xinli Xiao, Conggan Ma, Min Liu et Lingyu Chen. « Research on the evaluation method of the business model for the recycling of hazardous waste in power grid ». Advances in Engineering Technology Research 1, no 1 (17 mai 2022) : 241. http://dx.doi.org/10.56028/aetr.1.1.241.
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Hazardous wastes in power grids include waste transformer oil and waste lead-acid batteries, etc. Due to the problems of extremely large number of points, wide distribution, and small number of units, coupled with differences in hazardous waste recycling technologies, policies, and markets in various regions, so Possible business models need to be listed and evaluated. This paper establishes an evaluation index system for the business model of hazardous waste recycling, and uses the TOPSIS method to evaluate five feasible business models. The evaluation results will help relevant departments of power grid companies at all levels to formulate recycling strategies according to the characteristics of hazardous waste recycling, so as to facilitate the recycling and reuse of hazardous wastes.
4
Zia, Umer, Hira Iram, Hafiz Zeshan Haider, Faiza Ameen, Maria Abrar et Muhammad Atif. « Review—Biowaste as a Source of Conductive Carbon ». ECS Journal of Solid State Science and Technology 11, no 2 (1 février 2022) : 021001. http://dx.doi.org/10.1149/2162-8777/ac4edb.
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Recycling trend has transformed the prerequisites of our cravings. Makeover of waste material into useful goods has become inevitable. Bio waste shares a major portion of waste materials, hence pursued for recycling. Activated carbon from bio waste has been reported remarkable in electrochemical performance (capacitance, charge density, charge-discharge ratio etc.). This survey of data has been compiled for different bio wastes as a source of activated carbons with conductive behavior.
5
Nhu, Dung Kim Thi, Duoc Van Tran, Thuat Tien Phung et Toi Trung Tran. « An overview of recycling methods from composite wastes ». Journal of Mining and Earth Sciences 62, no 3b (20 juillet 2021) : 69–79. http://dx.doi.org/10.46326/jmes.2021.62(3b).08.
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In the era of industrialization and modernization, pollution caused by industrial wastes has become one of the biggest challenges most countries are facing. Wastes such as plastics, ceramics, paper, metals, composite, etc. are the predominant detriments to the environment. Although composite materials account for just a small proportion in the waste stream, they are difficult to process and possess a great number of potential risks to the environment. At the same time, recycling and recovering composite waste materials are more challenging than other easy-to-handle waste materials. This paper will first present an overview of the methods used to recycle composite wastes, then it will further orientate recycling technologies suitable for Vietnam.
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Rovin, S. L., A. S. Kalinichenko et L. E. Rovin. « The return of the dispersed metal waste into production ». Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no 1 (10 avril 2019) : 45–48. http://dx.doi.org/10.21122/1683-6065-2019-1-45-48.
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The article presents an alternative method of recycling of dispersed metal waste, based on a continuous solid-liquid-phase process, implemented in rotary tilting furnaces (RTF). The new proposed method of recycling allows processing wastes with almost any composition and state from metal to oxide and multicomponent wastes (shavings, fine scrap, mill scale, aspiration dust, sludge, etc.). The wastes can be even contaminated with moisture, oil, and organic impurities. The method developed does not require preliminary preparation of the initial materials (cleaning, homogenization, pelletizing, etc.). The finished products are ingots (pigs) for subsequent processing aiming the particular chemical composition or cast alloys of certain brend.
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Štreimikienė, Dalia. « Waste management in Baltic States : Comparative assessment ». JOURNAL OF INTERNATIONAL STUDIES 16, no 4 (décembre 2023) : 39–51. http://dx.doi.org/10.14254/2071-8330.2023/16-4/3.
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In EU waste management policy the waste avoidance and reuse are under the highest priority and the recycling takes the third place while recovery and disposal are the least favourable options. The EU member states have to implement strict waste management policies based on this approach however though all countries have to prepare and implement waste management plants, their have achieved different results in waste management. The article aims to analyse the selected waste management indicators covering all stages of various wastes management ranging from prevention to recycling etc. available at Eurostat database and to present empirical comparative case study on waste management for Baltic. The different Multi Criteria Decision Making models were applied for comparing and ranking Baltic States based on their achievements in waste management in 2020. The case study revealed that the best performing country in waste management among Baltic States was Lithuania having the best indicators of waste generation per GDP and recycling rates of municipal waste and plastic packaging waste. Estonia was lowest ranked country according waste management due to very high overall total generated waste per capita and packaging and plastic waste per capita etc.
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Mishra, Srabani, Sandeep Panda, Ata Akcil, Seydou Dembele et Ismail Agcasulu. « A Review on Chemical versus Microbial Leaching of Electronic Wastes with Emphasis on Base Metals Dissolution ». Minerals 11, no 11 (11 novembre 2021) : 1255. http://dx.doi.org/10.3390/min11111255.
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There is a growing interest in electronic wastes (e-wastes) recycling for metal recovery because the fast depletion of worldwide reserves for primary resources is gradually becoming a matter of concern. E-wastes contain metals with a concentration higher than that present in the primary ores, which renders them as an apt resource for metal recovery. Owing to such aspects, research is progressing well to address several issues related to e-waste recycling for metal recovery through both chemical and biological routes. Base metals, for example, Cu, Ni, Zn, Al, etc., can be easily leached out through the typical chemical (with higher kinetics) and microbial (with eco-friendly benefits) routes under ambient temperature conditions in contrast to other metals. This feature makes them the most suitable candidates to be targeted primarily for metal leaching from these waste streams. Hence, the current piece of review aims at providing updated information pertinent to e-waste recycling through chemical and microbial treatment methods. Individual process routes are compared and reviewed with focus on non-ferrous metal leaching (with particular emphasis on base metals dissolution) from some selected e-waste streams. Future outlooks are discussed on the suitability of these two important extractive metallurgical routes for e-waste recycling at a scale-up level along with concluding remarks.
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Bhat, Sartaj Ahmad, Jaswinder Singh et Adarsh Pal Vig. « Management of Sugar Industrial Wastes through Vermitechnology ». International Letters of Natural Sciences 55 (juin 2016) : 35–43. http://dx.doi.org/10.18052/www.scipress.com/ilns.55.35.
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The present paper discusses the role of earthworms in recycling of sugar industrial wastes. The wastes generated from sugar industry are pressmud, bagasse, bagasse fly ash, sugar cane trash, sugar beet mud, sugar beet pulp, molasses etc. These wastes when mixed with other organic substrates become ideal mixtures for growth of earthworms. These wastes if stored in open field’s causes contamination in the environment and may cause several diseases in public health. But the governments have been unable to tackle the menace of solid waste pollution due to dearth of appropriate technologies, finance and space. Therefore, environment friendly and cost effective technologies for nutrient recycling or remediation of wastes are being advocated as an alternative means for conserving and replenishing natural resources of the ecosystems. Vermicomposting is one such technology that synergises microbial degradation with earthworm’s activity for reducing, reusing and recycling waste materials in a shorter span of time. Earthworm technology can convert sugar industrial wastes into valuable fertilizing material. The final product (vermicompost) produced during the process of vermicomposting is nutrient rich organic fertilizer with plant available nutrients such as nitrogen, potassium, calcium and phosphorus. In the present study an attempt has been made to document the role of earthworms in reuse of sugar industry waste.
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Bhat, Sartaj Ahmad, Jaswinder Singh et Adarsh Pal Vig. « Management of Sugar Industrial Wastes through Vermitechnology ». International Letters of Natural Sciences 55 (3 juin 2016) : 35–43. http://dx.doi.org/10.56431/p-jh3zmh.
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The present paper discusses the role of earthworms in recycling of sugar industrial wastes. The wastes generated from sugar industry are pressmud, bagasse, bagasse fly ash, sugar cane trash, sugar beet mud, sugar beet pulp, molasses etc. These wastes when mixed with other organic substrates become ideal mixtures for growth of earthworms. These wastes if stored in open field’s causes contamination in the environment and may cause several diseases in public health. But the governments have been unable to tackle the menace of solid waste pollution due to dearth of appropriate technologies, finance and space. Therefore, environment friendly and cost effective technologies for nutrient recycling or remediation of wastes are being advocated as an alternative means for conserving and replenishing natural resources of the ecosystems. Vermicomposting is one such technology that synergises microbial degradation with earthworm’s activity for reducing, reusing and recycling waste materials in a shorter span of time. Earthworm technology can convert sugar industrial wastes into valuable fertilizing material. The final product (vermicompost) produced during the process of vermicomposting is nutrient rich organic fertilizer with plant available nutrients such as nitrogen, potassium, calcium and phosphorus. In the present study an attempt has been made to document the role of earthworms in reuse of sugar industry waste.
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Tran, Toi Trung, Chinh Thi Vu et Nhung Thi Pham. « Technologies for metal recycling from electrical - electronic wastes ». Journal of Mining and Earth Sciences 62, no 3b (20 juillet 2021) : 58–68. http://dx.doi.org/10.46326/jmes.2021.62(3b).07.
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Wastes from electrical - electronic equipment (WEEE) are of huge concerns worldwide. With the decreasing life cycle of most electrical - electronic equipment (EEE), the WEEE growth rate is fast, about 3÷5% annually. This is considered as the fastest growing waste stream among municipal wastes. WEEE contains, in addition to plastic, glass etc., high contents of base metals and precious metals. They are regarded as potential secondary resources of metals in addition to primary resources of metals from metallic ores. Over the past decades, many metal recycling technologies from WEEE have been developed including physical separation processes and chemical extraction processes. This article summarizes the characteristics, recycling principles, separation processes and optimal operating conditions of the world's most currently common technologies for metal recycling from WEEE. So that one can derive new directions for metal recycling from electrical - electronic wastes in the Vietnam case.
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Baba Srinivas, Adhikarla, Santosh Kumar Sar, Shweta Singh et Santosh Yadav. « Solid Waste management from Steel Melting Shop ». Journal of Applied and Advanced Research 2, no 1 (21 mars 2017) : 48. http://dx.doi.org/10.21839/jaar.2017.v2i1.55.
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- Production of steel in steel Industry is accomplice for the generation of solid waste materials like sludge, slag, dust etc. In recent days most part of wastes are generated from steelmaking process which is a focus point now-a-days. The solid waste generation, presently in Indian steel industry is in the range of 400 - 500 kg/t of crude steel and recycling rate varies between 40 - 70 % which lead to higher production costs, lower productivity and further environmental degradation. It is very essential not only for recycling of the waste valuable metals and mineral resources but also to protect the environment. I Solid waste management in steel industry is broadly classified in “4 R” i.e. reduce, reuse, recycle and restore the materials. The aim of the paper is to explore the various developments for total recycling of solid waste generated from steel industry, so that the vision for making “clean & green steel with zero waste” can be achieved for survival and growth of steel business in future. Keywords—Steel, Reuse, recycle, solid waste, sustainable development.
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Shrivastava, Harsh, et Vivek Parashar. « E-Waste Causes and Management Using BASEL Convention ». International Journal of Electrical and Electronics Research 3, no 1 (30 mars 2015) : 5–8. http://dx.doi.org/10.37391/ijeer.030102.
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"E-waste" is a popular, informal name for electronic products nearing the end of their "useful life. “Electronic waste" may be defined as discarded computers, office electronic equipment, entertainment device electronics, mobile phones, television sets, and refrigerators. "E-wastes are considered dangerous; ascertain components of some electronic products contain materials that are hazardous, depending on their condition and density. This includes used electronics which are destined for reuse, resale, salvage, recycling, or disposal. Others are re-usable (working and repairable electronics) and secondary scrap (copper, steel, plastic, etc.) to be "commodities", and reserve the term "waste" for residue or material which is dumped by the buyer rather than recycled, including residue from reuse and recycling operations. Many of these products can be reused, refurbished, or recycled in an environmentally sound manner so that they are less harmful to the ecosystem. This paper highlights the hazards of e-wastes, the need for its appropriate management and options that can be implemented.
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Samir, Mourad, Faruz Alama, Paul Buysse, Tomas van Nylen et Oleg Ostanin. « Disposal of Mining Waste : Classification and International Recycling Experience ». E3S Web of Conferences 41 (2018) : 02012. http://dx.doi.org/10.1051/e3sconf/20184102012.
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The main directions of mining and industrial wastes’ utilization are the production of building materials, their use in the construction industry without additional processing, and also the production of metals from metal-containing raw materials. It should be noted that current waste is preferable for the production of building materials, since they preserve the primary physical and mechanical properties and chemical composition and, moreover, can reach the consumer bypassing all other steps that are mandatory for waste consolidated (transportation, storage, etc.). For the production of building materials, not less than 30% of overburden and refinement tailings are suitable, almost all metallurgical and fuel slags, waste products of fertilizers and building materials. Even larger amounts of waste can be used for various laying and burial works (construction of road bases and dams, filling of worked out areas, leveling of the relief).
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Shareefdeen, Zarook, et Aya Tarek ElGazar. « Management of Plastic Wastes through Recent Advanced Pyrolysis Processes ». Applied Sciences 14, no 14 (15 juillet 2024) : 6156. http://dx.doi.org/10.3390/app14146156.
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Plastics are predominant in numerous sectors like packaging, agriculture, hardware, electronics, and many others. Annual plastic demand has been rapidly growing in the last few decades because of the increasing dependency on plastics. As a consequence, massive amounts of plastic waste are being generated every year. These plastic wastes are non-biodegradable, and hence their disposal poses a serious threat to the ecosystem and causes significant environmental problems such as endangering the safety of marine life, wildlife, air, water, and soil, etc. A large portion of plastic waste ends up in landfills, and only a small fraction is recycled. The continuous dependence on landfills as the main disposal method for plastic waste is costly and ineffective. Common solutions to plastic waste management are incineration and recycling; however, incineration emits harmful pollutants and greenhouse gases that contribute to ozone layer depletion and global warming; moreover, recycling is expensive and inefficient. As an alternative to recycling and incineration, the pyrolysis process can convert plastic wastes into more valuable fuel products. Pyrolysis is a thermal process that converts raw material into pyrolysis liquid, solid wax, and non-condensable gases in the absence of oxygen. This process is attractive because it is economical and energy-efficient, and it can be used to convert various types of plastic waste into valuable products. In recent years, there have been significant developments in pyrolysis applications in liquid fuel production from plastic wastes. This work reviews recent advances in and challenges for the pyrolysis process for converting plastic wastes into a valuable alternative fuel, focusing on studies of advanced pyrolysis processes published over the last five years. The paper also highlights the numerical modeling of pyrolysis of plastic wastes and the potential impact of pyrolysis on the future of sustainable waste-management practices of plastics.
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Hong, Soo-Yeon, Cheol-Woo Yoon, Young-Sam Yoon, Jang-Hyun Kang et Tae-Wan Jeon. « A Study on Safety Management Plan for Recycling of Medium-Contact Wastes via Ecotoxicity Assessment ». Environmental Health Insights 16 (janvier 2022) : 117863022211118. http://dx.doi.org/10.1177/11786302221111872.
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In South Korea, hazardous characteristics of wastes to be recycled are managed through the “Environmental Impact Assessment of Recycling” system. The ecotoxicity of medium-contact recyclable wastes, that is, those in contact with soil, groundwater, surface water, etc., is managed according to this system and is determined based on whether or not they exceed an ecotoxicity value (TU) of 2.0. The ecotoxicity of wastes is tested and determined by using pretreated eluate samples according to the Official Wastes Test Standard and applying the Official Water Pollution Process Test Standard. However, no ecotoxicity management limits are stipulated for medium-contact recycling using wastes in numerous other countries. This study aims to evaluate applicability and safety of the ecotoxicity test for wastes used in medium-contact recycling and establish an efficient management plan for hazardous characteristic wastes. Target wastes for the survey were selected based on the Wastes Control Act in South Korea. Nine types of waste were selected, which are representative types of wastes to which ecotoxicity is applied. In order to secure the representativeness of the target samples, a total of 45 samples were collected by selecting 5 cases each of the 9 waste types in consideration of the type of industry and amount of waste generated. Limit exceedance was calculated for each category of hazardous substances (leaching, total content), pH, and ecotoxicity of a total of 45 samples, and was found to increase in the order of leaching 2.22% < pH 9.09% < content 31.11% < ecotoxicity 37.21%. This indicates that the limit exceedance was maximum in the ecotoxicity category. Therefore, the application of ecotoxicity limit is efficient for identifying and comprehensively managing the environmental impacts of various types of hazardous substances contained in wastes from the perspective of comprehensive toxicity.
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Kirmani,, Mr Faheemul Islam. « USE OF PET (POLY ETHYLENE TERAPHTALATE) IN BITUMINOUS PAVEMENT ». INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no 05 (27 mai 2024) : 1–5. http://dx.doi.org/10.55041/ijsrem34926.
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Over the years, plastics have become the preferred packaging material by virtue of their superiority over other conventional materials. With the increasing use ofplastic as packaging material, post- consumer plastic wastes became an increasingly serious environmental issue.So,there is an immediate need for adoption of environment friendly technologies such as economic recycling, development of biodegradable plastics, conversion of plastic wastes into value added products and fuel, use of plastic wastes for road construction, recycling of PET bottles into fibers or bottle to bottle technologies etc. In this paper, an attempt was made to summarise the present scenario of plastics waste management vis-à-vis various disposal techniques, which need to be expeditiously taken-up with an eye oninnovative solutions. Keywords: - Poly Ethylene Teraphthalate, Flow, Plastics, stability, tensile strength
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Khan, MN Hasan. « Assessment of Municipal Solid Waste Management in Mymensingh City towards Sustainable and Profitable Waste Management ». Journal of Science and Technology Research 3, no 1 (30 novembre 2022) : 41–48. http://dx.doi.org/10.3329/jscitr.v3i1.62805.
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Waste generation is increasing with the increasing of population at Mymensingh city but the waste management practice of the Mymensingh city corporation is not well established. The present study was conducted to find out profitable opportunities for municipal solid waste (MSW) management of Mymensingh city. Both primary and secondary sources were used to collect data as fulfillment of the study. Twenty two different locations of 5 wards in the city were visited for collecting these data. In the city estimated amount of waste produce 150 tons/day where 40-50% biodegradable and 15-25% recyclable paper, plastic, glass, metal etc. Currently waste is not being collecting and disposing scientifically due to unavailability of facilities, thus creating environmental pollution as well as unable to earn profit. Resource recovery and recycling could be a good option to reduce waste and earn profit from recyclable materials such as plastic, paper, metal etc. Besides this composting could be useful to produce bio fertilizer and bio gas from biodegradable wastes. By selling bio-fertilizer and biogas city could also earn profit. Integrated waste management combination with reduce, recovery, recycling and composting would be better solution for managing waste in the city. J. of Sci. and Tech. Res. 3(1): 41-48, 2021
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Prifti, H., et Tania Floqi. « Solid Waste Management Aiming Biogas Production In Albania ». Ingenious 1, no 1 (2021) : 115–25. http://dx.doi.org/10.58944/pnyn2359.
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One of the main environmental problems in Albania is the continuously increasing generation of municipal solid waste. In many countries, sustainable waste management as well as waste prevention and reduction, have become major priority. Uncontrolled waste dumping (on the roads, river sides, etc.) in our country is no longer acceptable. Controlled landfill disposal and incineration of wastes are not considered optimal practices, as energy recovery and recycling of nutrients and organic matter is aimed. Continuously efforts have been done for the improvement of this critical situation such as approval of laws, decisions, regulations etc., according to the National Strategy on Integrated Waste Management (2018-2030) and EU Directives 2008/98/EC on waste and repealing certain Directives. In this paper are presented the characteristics of a wide range of urban solid waste, industrial solid waste and composition of the waste i.e. waste stream. As organic waste component represents the highest percentage (41% – 66%) at the waste composition should be used for biological treatment and for biogas production.
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Girich, Maria G., et Antonina D. Levashenko. « SEPARATE AND DOMINATE : HIDDEN POTENTIAL OF WASTE MARKET IN RUSSIA AND IN THE WORLD ». International Trade and Trade Policy, no 1 (15 mars 2019) : 72–84. http://dx.doi.org/10.21686/2410-7395-2019-1-72-84.
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The waste market is a large segment of international trade, which allows earning on the recyclable treatment materials and the waste trade. The separate waste collection allows obtaining a better quality of recyclable materials, which can be processed without additional sorting. Toda, measures for infrastructure development for separate collection, recycling, and incineration of solid municipal waste are established as part of the Strategy of solid municipal waste management in theRussian Federation. At the same time, disposal is the primary method of waste management. As a result, there is a problem of development of separate waste collection system which is aimed at reducing the use of a non-eco-friendly and desirable method of waste management – disposal. OECD proposes many standards for separate waste collection are possible, including integration of waste management hierarchy, development of extended producer responsibility practices, stimulation and training of population in a separate waste collection, etc. These measures allowed OECD countries, for example,Germany,Sweden,Austriato become world leaders in the field of waste treatment. These countries improve the quality of the environment, earn through recycling, resale of garbage, saving the money by re-using of useful components contained in the wastes.
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Wu, Yong Chun, et Lian Feng Xu. « Analysis of the Barrier Factors of Municipal Solid Waste Classification Recycling ». Advanced Materials Research 726-731 (août 2013) : 2618–21. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.2618.
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Many cities in China are facing a "junk siege" dilemma, municipal solid waste classified recycling is one of the effective disposal methods of garbage scientific management, and is also the best way to waste reduction, recycling and harmless, However our municipal solid waste classification recycling remain stagnant, This paper argues that it is because of many obstacles that municipal solid waste classification recycling face makes municipal solid waste classification recycling have little effect, which include public awareness needs to be improved, the limitations of traditional garbage classification, lack of corresponding laws and regulations, garbage recycling facilities not complete and the corresponding theoretical issues remain to be explored etc.
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Yang, Li, Xiang Zhang, Shubin Yan et Yunxia Luo. « Research on the Resource Treatment and Comprehensive Utilization of Carbon Containing Wastes Using Pyrolysis–Gasification Two-Stage Recycling ». Processes 12, no 2 (9 février 2024) : 361. http://dx.doi.org/10.3390/pr12020361.
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Carbon containing waste has a certain calorific value and utilization value due to the presence of carbon elements. However, the current treatment methods are mostly traditional landfill disposal, incineration, or expensive physical and chemical reaction methods, which clearly do not comply with the rules of the current clean and resource-saving society. In this paper, a new technology and system for carbon containing wastes is proposed, which comprehensively treats and recycles carbon containing wastes, including solid waste, wastewater, waste gas, etc., using pyrolysis–gasification two-stage-cycle technology. The calculation results indicate that the technical scheme proposed in this article is feasible and can achieve the recycling of intermediate and final products, the efficient and clean utilization of carbon containing waste, and the graded utilization of energy. The clean utilization rate of carbon containing waste can be effectively improved, the energy consumption and cost of separate treatments can be reduced, and zero waste emissions can be completely achieved by the comprehensive pyrolysis–gasification two-stage-cycle treatment and resource utilization technology, which is one of the preferred solutions for future resource-saving societies.
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Khalid, Ibrahim, Sadiq Ullah et Iqbal Saeed Umar. « The problem of solid waste : origins, composition, disposal, recycling, and reusing ». International Journal of Advanced Science and Computer Applications 1, no 1 (30 décembre 2021) : 27–40. http://dx.doi.org/10.47679/ijasca.v1i1.6.
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Solid waste disposal is a major challenge in many industrialized and developing nations, both in metropolitan regions as well as rural ones. The collection and disposal of municipal solid waste (MSW) is a serious issue facing metropolitan areas in many nations today. An effective MSW management strategy must satisfy all of these criteria: financial viability; technical feasibility; social and legal acceptability; and ecological friendliness. Small and large cities alike have a major difficulty in dealing with solid waste management.
One of the current study topics is the valuation of food organic waste. Existing waste disposal methods include the typical landfill, incineration, composting, and other methods of handling solid waste. Composting and anaerobic digestion have traditionally been the most widely employed methods for the treatment and exploitation of the organic part of MSW (AD). The amount of organic solid waste (OSW) being generated globally is rising at an astronomical rate. Agricultural waste, domestic food waste, human and animal wastes, etc. comprise the majority of OSW. They're often used as animal feed, disposed of in landfills, or burnt. OAWs are made up of protein-, mineral-, and sugar-rich components that may be employed as substrates or raw materials in other processes.
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Segui, Pauline, Amine el Mahdi Safhi, Mustapha Amrani et Mostafa Benzaazoua. « Mining Wastes as Road Construction Material : A Review ». Minerals 13, no 1 (6 janvier 2023) : 90. http://dx.doi.org/10.3390/min13010090.
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The mining industry manages large volumes of tailings, sludge, and residues that represent a huge environmental issue. This fact has prompted research into valorization of these wastes as alternative aggregates for concrete production, embankments, pavement material, etc. The use of mining wastes as a resource for construction presents two benefits: conserving natural resources and reducing the environmental impacts of mining. In the case of road construction, the use of mining wastes has not yet been developed on a large scale and there is a major lack of specific legislation. This gap is due to the variety of exploited rocks, the diversity of tailings, mine residues, or valuable by-products slated for valorization, and the environmental specifics. This paper presents a review on recycling mine wastes as road construction material, including waste rock and mine tailings. Those materials were mostly used in infrastructure where soils had initially poor geotechnical properties (low bearing capacity, frost susceptibility, swelling risk, etc.). Different mining wastes were used directly or stabilized by a hydraulic binder through geopolymerization or, in some cases, with bituminous treatment. Overall, the use of mine wastes for road construction will have a considerable environmental impact by reducing the volume of waste and offering sustainable raw materials.
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Grigorieva, Larisa, et Pavel Oleinik. « Recycling Waste Wood of Construction ». Materials Science Forum 871 (septembre 2016) : 126–31. http://dx.doi.org/10.4028/www.scientific.net/msf.871.126.
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The article considers contemporary methods and especially recycling of wood waste. The volume of wood waste is constantly growing due to the increase in the number of buildings subject to demolition or dismantling, reconstruction and repair works. The article contains the main requirements to the raw material derived from waste. Advantages of products made from wood-polymer composite materials on physic mechanical parameters. The comparative characteristic of cost for the production of wood-polymer plastic. It is noted that production made from wood polymer composite materials has unlimited product range, including boards, various profiled molded and moulded details with complicated shape (the board for the floor, skirting board, baguette, etc).
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Semwal, Ashish, Prince Yadav et Samreen Bano. « Utilization of construction demolition waste as partial replacement in concrete : An experimental study ». IOP Conference Series : Earth and Environmental Science 1326, no 1 (1 juin 2024) : 012059. http://dx.doi.org/10.1088/1755-1315/1326/1/012059.
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Abstract The construction industry generates a significant amount of waste, which presents a significant challenge for waste management. This waste includes construction and demolition waste (CDW), crushed aggregate, mortar, crushed brick, stones, etc. Reusing and recycling these wastes can reduce waste disposal and save natural resources. This research paper explores the study of the combined replacement of recycled coarse aggregate (RCA) and recycled fine aggregate (RFA) with varying proportions and evaluates the feasibility and optimum proportion of waste material as a partial replacement. Mechanical properties such as compressive strength, split tensile strength, and flexural strength the of all specimens were tested as a combined replacement of RCA (0%, 25%, 50%, 75%, 100%) and RFA (0%, 10%, 20%, 30%, 40%) for M30 grade concrete. Furthermore, SEM, EDX, of mortar were analysed to determine the microstructure characteristics of the materials.
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Petruk, Roman, Yulia Bilichenko et Halyna Petruk. « Економічні розрахунки вибору методу утилізації пестицидів ». Personality and environmental issues 1 (13 janvier 2022) : 42–46. http://dx.doi.org/10.31652/2786-6033-2022-1(1)-42-46.
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Goal: is a brief analysis of the main ways of dealing with unusable pesticides and pesticide-containing wastes and facilities and substantiation of technical and economic parameters of processes of neutralization of unusable pesticides and hazardous waste, as well as establishment of the most optimal methods and ways of their utilization. To establish the most optimal methods and ways of utilization of pesticides and pesticide-containing waste, a financial and economic assessment of pesticide exports from Ukraine to processing plants in Europe was made, the cost of burning pesticides at specialized plants in Ukraine was calculated, the total cost of reclamation works was calculated. on recycling of pesticide containers. Methodology: To solve the tasks in the work used modern methods of scientific research: analysis - to summarize modern scientific and technical advances in the prevention of environmental pollution due to pesticides entering the environment; indication methods - for assessment of soil, water and air pollution; methods of reclamation of contaminated areas and incineration of pesticides; methods of analysis of gas mixtures, etc. Scientific novelty: for the first time scientific and methodological calculations of environmental safety parameters and management of unusable pesticides and pesticide-containing wastes, the essence of which is to take into account the main components of the cost of pesticide disposal and restoration of contaminated areas, including management actions for all components of pesticide territories and largely solve the problem of pesticide pollution. Conclusions: calculations of the cost of recycling various facilities that contain unusable pesticide-containing drugs and waste and established the most optimal methods and ways of recycling pesticides in Ukraine. A brief analysis of the main methods of handling unusable pesticides and pesticide-containing waste and facilities and substantiated the technical and economic parameters of the disposal of unusable pesticides and hazardous waste, as well as the most optimal methods and methods of their disposal.
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Dawood, Sarhan S. « Future Risk Assessments of E-waste in Kurdistan Region of Iraq ». Academic Journal of Nawroz University 8, no 4 (18 octobre 2019) : 121. http://dx.doi.org/10.25007/ajnu.v8n4a443.
Texte intégralRésumé :
Technical development in the field of electronics exceeded all expectations in terms of production and innovation, which made human life captive to electronic devices such as mobile phones, computers and their peripherals, TVs…etc. This increasing growth in quantity of these devices and their relatively short life-cycles has led to excessive accumulation of E-waste end up as landfills. Due to a large amount of toxic substances of these E-wastes, there are huge alarming hazards on the environment and human health. Some of these E -wastes contain materials such as Mercury, lead, cadmium, phosphorus and other hazardous substances which have serious impacts on the environment and human health. This research has carried field-study to investigate the magnitude of the E-waste and the scale of the impact to the environment and health in the Duhok Governorate in Kurdistan region of Iraq. The study proposes appropriate solutions to E-waste recycling and minimizes its negative impact.
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Wu, Jiang-Ping, Ling Mo, Hui Zhi, Ying Peng, Lin Tao, Zi-He Ren, Xiao-Jun Luo et Bi-Xian Mai. « Hepatic ethoxyresorufin-O -deethylase induction in the common kingfisher from an electronic waste recycling site ». Environmental Toxicology and Chemistry 35, no 6 (22 mars 2016) : 1594–99. http://dx.doi.org/10.1002/etc.3294.
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Barati, Saeideh. « Applications of agricultural waste in food industry ». Journal of Biological Studies 6, no 1 (10 mai 2023) : 178–92. http://dx.doi.org/10.62400/jbs.v6i1.7779.
Texte intégralRésumé :
Agricultural wastes are by-product outputs of production and processing of agricultural products that contain bioactive compounds, which have many benefits on human health. Agricultural wastes produced from various sources such as cultivation, livestock, industrial means, and etc are great concern because of the problems of environmental pollution, recycling and utilization. Therefore, application of agricultural wastes in any other environmentally friendly way like compost production by fermenting the agricultural, animal feed production, food production and energy production (bio gas) is suggested. It can be concluded that recycling agricultural wastes is important and necessary for environment and economical saving. This recycling of agriculture wastes enhance agricultural and food production along with improve their quality.
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Ho, Ngoc Cuong, Thi Thuy Dung Nguyen, Thi Thu Huyen Luu et Thi Vinh Hoang. « Factors affecting the behaviour of domestic solid waste reduction in households:A case study in Dien Chau, Nghe An ». Ministry of Science and Technology, Vietnam 65, no 4 (25 avril 2023) : 59–65. http://dx.doi.org/10.31276/vjst.65(4).59-65.
Texte intégralRésumé :
This research aims to analyse the factors affecting the behaviour of domestic solid waste reduction in households in Dien Chau town (Nghe An province) by using the Probit regression model. The data was collected from 60 households. The results showed that the domestic solid waste in the study area is mainly from households and organic solid waste. Besides, there were solid wastes, that are paper, scrap, metal, and plastic, could be recycled and reused. Results of the surveyed households showed that there were many activities to reduce solid waste, such as waste classification at source, recycling and reuse, covert organic rubbish into compost or animal feed, etc. From the Probit model, the factors affecting the behaviour of domestic solid waste reduction at households in Dien Chau town included age, gender, and awareness of households on domestic solid waste reduction. These are affecting factors that can be used as a reference to strengthen the behaviour of reducing domestic solid waste in the study area in the coming time.
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Galkina, Elena, Aleksandr Terehov, Egor Nikitin, Daria Zhelnina et Alexandra Zachinyaeva. « Solutions to minimise waste formation at machine-building enterprises ». BIO Web of Conferences 84 (2024) : 05015. http://dx.doi.org/10.1051/bioconf/20248405015.
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The world is striving to create a cyclical economy, which implies multiple use of production waste. In this regard, the problem of waste production, generation and recycling requires an effective solution. Unfortunately, the average level of waste recycling in Russia is about 52%. To improve this indicator, it is necessary to introduce the principles of resource saving into production, to use the most efficient technologies of waste recycling, to apply the principles of eco-design in the development of new products, etc. One of the large-scale types of waste generated at machine-building enterprises can be metal chips contaminated with oil products. The article considers the methods of chip recycling used at machine-building enterprises and chooses the method that allows to improve the quality of remelted metal and reduce environmental pollution.
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Yadava, Shalini, B. Chakradharb et Anil Sharmac. « Recycling Process for the Management of E-Waste from Colour Picture Tubes of TV in Manufacturing Building Materials ». Advanced Materials Research 341-342 (septembre 2011) : 859–67. http://dx.doi.org/10.4028/www.scientific.net/amr.341-342.859.
Texte intégralRésumé :
E-waste released from Television colour picture tube manufacturing process is hazardous in nature and its worldwide disposal has become major concern to safe guard the environment and ecology. The solid wastes generated from the picture tube manufacturing process contain significant quantity of compounds of lead, nickel, cobolt, iron etc. The presence of toxic substances and their characteristic nature made these wastes hazardous and pose serious problems in their disposal resulting in major environmental concerns. In the present study an attempt has been made to develop a new cost effective process for immobilizing and recycling e-waste released from electronic industry in developing non-hazardous building material using additives and binders. Detoxification /immobilization of e-waste was achieved in making composite products using cement and sand as additives through solidification/stabilization process. Further strength and stability of solidified composite products was achieved through curing process. The quality and suitability of the S/S cured composite products were tested and assessed for their Engineering properties (compressive strength, water absorption, density), Toxicity leachate characteristics, Mineralogical studies, Morphological studies for their use in engineering applications, application as construction materials like bricks, blocks, aggregates and confirmed their environmental significance.
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D. Venkat Naik, C. Venkateshwar. « A Study of Solid Waste Management (SWM) and Conversion of Wet Waste and Vegitable Market Waste into Feeds and as alternative Energy of GHMC- Alwal Circle, Hyderabad in Telangana. » Proceeding International Conference on Science and Engineering 11, no 1 (18 février 2023) : 319–32. http://dx.doi.org/10.52783/cienceng.v11i1.130.
Texte intégralRésumé :
The overall goal of this study on urban solid waste management is to collect, treat and dispose of solid wastes generated by all municipality authorities and population groups in an environmentally and socially satisfactory manner using the most economical means available. Greater Hyderabad Municipal Corporation (GHMC) are usually authorized to have responsibility for providing solid waste management services to the abovestudy area i.e Alwal Circle, As Hyderabad city grow economically, the industrial activities and consumption patterns drive up a growth of solid waste quantities. At the same time, increased traffic congestion adversely affects the productivity of the solid waste fleet. Productivity loss is exacerbated by longer hauls, open lands are turning as dump yards for commertial and household waste. The main objective of the study is educating a. waste generating communities for segregation, b. rag-pickers for safe handling & c. segregating agencies for recycling to create economical values like investment, employment etc.
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Blinová, Lenka, et Peter Godovčin. « Importance of Recycling the Waste-Cables Containing Copper and PVC ». Research Papers Faculty of Materials Science and Technology Slovak University of Technology 29, no 48 (1 juin 2021) : 1–21. http://dx.doi.org/10.2478/rput-2021-0001.
Texte intégralRésumé :
Abstract Urbanization, development of economy, increasing population and improved living standards and lifestyle have caused a sharp growth in waste. Inappropriate or inefficient waste disposal techniques can cause serious air, soil, and groundwater pollution, which subsequently can negatively affect the urban environment and threaten the health of residents. The goal of waste management is to move to a circular economy in which waste does not exist. If there is no possible way to reduce or reuse waste, the best solution is recycling it. Recycling brings abundant benefits on the economic and ecological levels levels, and helps reduce overall human health risk of adverse impacts. Recycling of the waste-cables which contain PVC and copper replaces the production of virgin PVC and mining of copper from copper ore, it reduces landfill solid waste pressures, saves energy and water sources, reduces emissions to environment, and also reduces negative impacts from improperly dispose of waste, etc. This paper presents an overview of recycling techniques for the waste-cables containing copper as a core and polyvinyl chloride as an insulating layer or sheath. It also lists advantages and disadvantages of these techniques and importance of recycling this type of waste.
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Pattnaik, Monalisha, Pooja Pandey, Gregory J. O. Martin, Hari Niwas Mishra et Muthupandian Ashokkumar. « Innovative Technologies for Extraction and Microencapsulation of Bioactives from Plant-Based Food Waste and Their Applications in Functional Food Development ». Foods 10, no 2 (30 janvier 2021) : 279. http://dx.doi.org/10.3390/foods10020279.
Texte intégralRésumé :
The by-products generated from the processing of fruits and vegetables (F&V) largely are underutilized and discarded as organic waste. These organic wastes that include seeds, pulp, skin, rinds, etc., are potential sources of bioactive compounds that have health imparting benefits. The recovery of bioactive compounds from agro-waste by recycling them to generate functional food products is of increasing interest. However, the sensitivity of these compounds to external factors restricts their utility and bioavailability. In this regard, the current review analyses various emerging technologies for the extraction of bioactives from organic wastes. The review mainly aims to discuss the basic principle of extraction for extraction techniques viz. supercritical fluid extraction, subcritical water extraction, ultrasonic-assisted extraction, microwave-assisted extraction, and pulsed electric field extraction. It provides insights into the strengths of microencapsulation techniques adopted for protecting sensitive compounds. Additionally, it outlines the possible functional food products that could be developed by utilizing components of agricultural by-products. The valorization of wastes can be an effective driver for accomplishing food security goals.
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Adhikari, Ram Chandra. « Investigation on Solid Waste Management in Developing Countries ». Journal of Research and Development 5, no 1 (12 décembre 2022) : 42–52. http://dx.doi.org/10.3126/jrdn.v5i1.50095.
Texte intégralRésumé :
Solid waste is global problem relating to environment, society and economics. Waste management is challenging issue as the quantity has been increasing with increase of population, urbanization and economic status. Some dozens of printed and online published books, journals, dissertations, website of agencies etc. were reviewed and by making outline and following guideline this article was prepared. It is found that the waste production varies from 0.25Kg to 1.38 Kg per capita per day in developing countries. In south South American countries it was recorded 1.07 Kg/capita/day, in Asian countries 0.4 to 1.62Kg/capita/day and in African region it was found 0.49 Kg/capita/day of waste production. The waste contains mostly biodegradable (50% to 80%). The collection system was very poor and from rural area only 10% to 20% waste and in urban area 44% to 90% of total produced waste was carried to collecting and management system. The common waste management’s adopted in developing countries were open dumping, landfill site, composting, incineration and open burning etc. From 18% to 92% of waste were found to dumping. In east pacific region 46% and in American countries 68.5% of total waste was carried to landfill site. The use of incinerator is scarcely found. Only in few countries well managed composting plants could be observed. Some landfill sites and incinerating plant shave generated electricity, biogas, brickets etc. Some pointed research gaps in this field are waste management and biodiversity, medicinal and hazardous waste management, vermicomposting etc. It can be recommended that for the waste management public awareness, participation of locals, application of reduction, reuse and recycling concept, waste management inside house premise, modernization and scientific management of solid wastes. Further researches are needed in different aspects of waste and management for the complete solution.
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Maurya, Madan Chandra, et Dinesh Kumar Malviya. « Recycled C&D waste- An energy efficient and sustainable construction material ». International Journal of Engineering, Science and Technology 13, no 1 (9 juillet 2021) : 119–24. http://dx.doi.org/10.4314/ijest.v13i1.18s.
Texte intégralRésumé :
Construction and demolition (C&D) wastes are generated with construction or demolition activities and consists of non biodegradable materials such as cement concrete, bricks, plaster, steel, rubble, woods, plastics etc. Large use of natural recourses for the production of construction materials such as concrete is a prime concern for sustainability. In order to minimize the environmental impacts in terms of energy consumption, pollution, waste disposal and global warming construction industries has started to look for new alternative sources which are capable of substituting the use of natural materials, also some attempts were taken to utilize the waste generated from the demolition of structures and construction activity. The main benefits from the recycling of C&D waste are conservation of natural resources, reduction in energy consumption, solution for waste disposal crisis, environment preservation. Its use reduces reliance on primary aggregates and lowers the environmental impact of construction.
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Liu, Jia You. « Waste Heat Utility Technology in Coal Mine ». Applied Mechanics and Materials 170-173 (mai 2012) : 2723–26. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.2723.
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Coal mine drainage, exhaust air and bathing wastewater, etc. contain a large amount of waste heat resource. Using the waste heat effectively is beneficial to achieve energy conservation and emissions reduction and improve economic benefit for coal mine. Heat pump and heat pipe are thermal devices recycling waste heat effectively. The ways and purpose of recycling waste heat in coal mine by using water-source heat pump, air-source heat pump and heat pipe exchanger is given. The performance of heat pump and heat pipe is briefly evaluated.
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Gupta, Piyush. « Plastic waste management, a concern for community ». Holistic approach to environment 11, no 2 (9 février 2021) : 49–66. http://dx.doi.org/10.33765/thate.11.2.3.
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Plastics i.e. polymers are long chains or networks of monomer molecules which can be fabricated in desired shape, colour and specifications. The multi-functionality of this macromolecule has made it an integral part of society. Due to being given immense importance in various industrial sectors, like information technology, electrical, as well as electronics industries, intelligent, smart and advanced packaging systems, agriculture, automobiles, biomedical applications, etc., they are quite indispensable for the modern generation. The huge demand and high frequency usage have alarmed a number of countries littered with plastic wastes which need to be attended immediately. The effects of plastic solid waste on environmental living and non-living components are noticeable in the ever-increasing level of plastic pollution both on land and in the oceans globally. This paper compiles the various aspects and prospects of disposal methods like landfilling, recycling, progress in recovery and management of plastic waste (i.e. primary, secondary, tertiary and quaternary) in order to minimize its huge volumes. The depolymerisation process is the key technology behind its success which provides a high yield of product and a minimal amount of waste. Few innovative methods other than recycling published by different researchers are also discussed in this paper.
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Cucui, Gabriel, Constantin Ionescu, Ioana Goldbach, Mihaela Coman et Elena Marin. « Quantifying the Economic Effects of Biogas Installations for Organic Waste from Agro-Industrial Sector ». Sustainability 10, no 7 (23 juillet 2018) : 2582. http://dx.doi.org/10.3390/su10072582.
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The evolution of the world economy, the continuous growth of human needs and industrial and technological development have led to an increased demand for energy and consumption of fossil fuels. Since fossil resources are limited, there is an urgent need for the evolution of current economies to achieve sustainable development (SD), supported predominantly by waste management, renewable energy production, limiting non-renewable resource consumption, sustainable development, etc. In this research, the management of waste (chicken debris and debris from meat processing/slaughter) resulting from the chicken slaughtering activities using biogas installations (BI) is shown to be a viable alternative that places the economic entity at intercept if waste recycling and the production of electricity, heat and digestate. The purpose of this research was to quantify the economic impact generated using BI, which processes organic wastes resulted from the processing flow of the meat chicken slaughterhouse.
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Li, Xiao Peng, Yun Song et Wei Wang. « Research on Evaluation Index System of Non-Metallic Materials Recycling Technologies from Copper Clad Laminate ». Applied Mechanics and Materials 768 (juin 2015) : 627–35. http://dx.doi.org/10.4028/www.scientific.net/amm.768.627.
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The Copper Clad Laminate (CCL) residue recycling technologies are important to improve the recycling of waste circuit boards and reducing the environmental impact during its life cycle. However, there has not yet been able to have the technical evaluation criteria for CCL residue. This study demonstrates the feasibility of one recycling technology from the technical, economic, social, environmental and political, and then determinates CCL residue recycling technologies evaluation index system by Delphi Method, AHP, expert panel and Questionnaire and etc., which provides a tool for CCL residue recycling technologies assessment.
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Godswill, Awuchi Chinaza, Awuchi Chibueze Gospel, Amagwula Ikechukwu Otuosorochi et Igwe Victory Somtochukwu. « Industrial And Community Waste Management : Global Perspective ». American Journal of Physical Sciences 1, no 1 (18 février 2020) : 1–16. http://dx.doi.org/10.47604/ajps.1043.
Texte intégralRésumé :
Purpose:The review focused on the management of industrial and communal wastes. Industrial and communal waste management practices are not uniform among countries; urban and rural areas, residential, and industrial sectors, all take different approaches.
Methodology: Industrial wastes can be classified on basis of their characteristics; Waste in dissolved and pollutant is in liquid form, e.g. dairy industry; Waste in solid form, but a number of pollutants within are in the liquid or fluid form, e.g. washing of minerals or crockery industry or coal.
Results: Industrial waste is produced as a result of industrial activities, including materials rendered useless during manufacturing process such as that of food and chemical industries, mills, factories, and mining operations. Dirt and gravel, concrete and masonry, solvents, chemicals, scrap lumber, scrap metal, oil, etc. are types of industrial waste. Industrial or community waste may be liquid, solid, or gaseous. It may be absolutely hazardous, mirror entry, or non-hazardous waste. Hazardous waste can be toxic, ignitable, corrosive, radioactive, or reactive. Industrial waste may pollute the soil, the air, or nearby water bodies, ending up in the sea.
Unique contribution to theory, practice and policy: Waste management is important component in a business' ability to maintain the ISO14001 accreditation. The ISO14001 standard encourages companies to ensure green environment and improve their environmental efficiencies every year by eliminating waste through the resource recovery practices. The principles of waste management puts some factors into consideration such as waste hierarchy, life-cycle of a product, resource efficiency, and polluter-pays principle. Common waste disposal and management methods include incineration, landfill, recycling, re-use, pyrolysis, resource recovery, composting, among others. An important method of waste management in industries and communities is the prevention of waste materials being created, better known as waste reduction. The waste management industry has adopted new technologies such as Radio Frequency Identification (RFID) tags, GPS, etc., which enable the collection of better quality data without the using estimation or manual data entry.
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Castro, Laura, María Luisa Blázquez, Felisa González et Jesús Ángel Muñoz. « Biohydrometallurgy for Rare Earth Elements Recovery from Industrial Wastes ». Molecules 26, no 20 (14 octobre 2021) : 6200. http://dx.doi.org/10.3390/molecules26206200.
Texte intégralRésumé :
Biohydrometallurgy recovers metals through microbially mediated processes and has been traditionally applied for the extraction of base metals from low-grade sulfidic ores. New investigations explore its potential for other types of critical resources, such as rare earth elements. In recent times, the interest in rare earth elements (REEs) is growing due to of their applications in novel technologies and green economy. The use of biohydrometallurgy for extracting resources from waste streams is also gaining attention to support innovative mining and promote a circular economy. The increase in wastes containing REEs turns them into a valuable alternative source. Most REE ores and industrial residues do not contain sulfides, and bioleaching processes use autotrophic or heterotrophic microorganisms to generate acids that dissolve the metals. This review gathers information towards the recycling of REE-bearing wastes (fluorescent lamp powder, spent cracking catalysts, e-wastes, etc.) using a more sustainable and environmentally friendly technology that reduces the impact on the environment.
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Yakoob, Dr K., V. Anil, Md Gulam Mohiuddin, G. Vijay Kumar, Md Luqman Shareef, R. Harsha Vardhan et A. Sai Chandana. « Conversion of Plastic Waste into Fuel by Pyrolysis ». International Journal for Research in Applied Science and Engineering Technology 12, no 5 (31 mai 2024) : 1752–57. http://dx.doi.org/10.22214/ijraset.2024.61899.
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Abstract: Plastics have woven their way into our daily lives and now pose a tremendous threat to the environment. Over a 100 million tons of plastics are produced annually worldwide, and the used products have become a common feature at overflowing bins and landfills. Though work has been done to make futuristic biodegradable plastics, there have not been many conclusive steps towards cleaning up the existing problem. Here, the process of converting waste plastic into value added fuels is explained as a viable solution for recycling of plastics. Thus, two universal problems such as problems of waste plastic and problems of fuel shortage are being tackled simultaneously. In this study, plastic wastes (low density polyethylene) were used for the pyrolysis to get fuel oil that has the same physical properties as the fuels like petrol, diesel etc. Pyrolysis runs without oxygen and in high temperature of about 300°C which is why a reactor was fabricated to provide the required temperature for the reaction. The waste plastics are subjected to depolymerization, pyrolysis, thermal cracking and distillation to obtain different value-added fuels such as petrol, kerosene, and diesel, lube oil etc. Converting waste plastics into fuel hold great promise for both the environmental and economic scenarios. Thus, the process of converting plastics to fuel has now turned the problems into an opportunity to make wealth from waste.
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Zhou, Gui Zhong, Zhao Feng Wang, Xuan Wang et Shao Xiang Li. « Recycling of Waste Hard Alloy via Electrochemical Dissolution Method ». Advanced Materials Research 610-613 (décembre 2012) : 2263–67. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.2263.
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Electrochemical dissolution method was used to achieve the recycling of waste hard alloy. Tungsten, cobalt powder and cobalt salts can be obtained through the control of suitable conditions of electric dissolution process ,such as cleaning of waste hard alloy, electric dissolution of waste hard alloy, knocking the basket, treatment of cobalt chloride etc. Tungsten and cobalt chloride solution can be obtained directly by this method, and thus to obtain the cobalt powder and cobalt salts. Recovery rate of WC and cobalt were above 98% and 92-95%.
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Athulya, T. S., et J. K. Reshma. « Plastic Pollution : A Global Crisis and the Overlooked Challenge of Low-Value Plastics ». Ecology, Environment and Conservation 30, no 02 (2024) : 688–93. http://dx.doi.org/10.53550/eec.2024.v30i02.047.
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Plastic pollution has become a global crisis, affecting diverse ecosystems from deserts to oceans and posing ecological and health risks. The excessive production and use of non-sustainable plastics have resulted in the creation of massive quantities of plastic waste, including microplastics. These pollutants have infiltrated the environment and food chain, endangering human health. Different categories of plastic pollution, such as macroplastics, microplastics, and nanoplastics, have varying impacts and associated risks. Managing plastic waste is a pressing global concern, with low value plastics like Multi-Layered Plastic (MLP) and soft plastics often overlooked. Due to their complex composition and recycling challenges, these materials frequently pollute waterways and oceans. Auditing low-value plastics is crucial for understanding the extent of this issue, its environmental consequences, and the feasibility of recycling solutions. Such audits inform policy decisions, recycling strategies, and conservation efforts, vital for mitigating the impact of low value plastics on the environment. Plastic pollution demands immediate attention and sustainable management to safeguard our planet’s health.
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Bawane, Prof S. G., Archies Shambharkar et Mukesh Sonwane. « Design and Fabrication of Plastic Cleaning and Drying Machine for Eco-Bricks ». International Journal for Research in Applied Science and Engineering Technology 11, no 3 (31 mars 2023) : 1871–73. http://dx.doi.org/10.22214/ijraset.2023.49643.
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Abstract: In this project we try to overcome the problem associated with plastic waste. In India huge number of plastics are used for various purposes such as for making of water bottle, soda bottle & bag, etc. which are not disposable. Because of these various problems occurs below. After studying the problem, we developed the effective way to overcome this problem. Bottle brick are light in weight and withstand high amount of load or pressure. Eco-bricks, polyethylene terephthalate (PET) bottles filled with mixed inorganic waste, have become a low-cost construction material and a valid recycling method to reduce waste disposal in regions where industrial recycling is not yet available. Because Eco-bricks are filled with mixed recovered materials, potential recycling of its constituents is difficult at the end of its life
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Khaertdinova, Alfira, Dilbar Sultanova et Albert Karimov. « European waste management experience : yesterday, today, tomorrow ». E3S Web of Conferences 247 (2021) : 01008. http://dx.doi.org/10.1051/e3sconf/202124701008.
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The article presents an economic analysis of the state of municipal waste generation, utilization and recycling in the countries of the European Union and the Russian Federation. As a basis for the analysis, we used data on the 20 most representative countries that make a significant contribution to the formation of the main macroeconomic indicators of the EU. The results of the implementation of the EU environmental policy, the degree of reflection on the volume of trade in secondary raw materials, private investment in this sector, employment in the processing and recycling sectors, etc. are considered. In addition, a correlation analysis was carried out, which allowed us to determine the degree of dependence of waste disposal and recycling on various indicators, to identify the most significant of them and the main factor affecting the effectiveness of the country’s environmental policy.
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Thanh, Nguyen Truong, Kim Lavane et Nguyen Vo Chau Ngan. « Potential For Recycling Single-Use Plastic Waste - Case Study in Can Tho City, Vietnam ». International Journal of Membrane Science and Technology 10, no 1 (21 octobre 2023) : 1184–94. http://dx.doi.org/10.15379/ijmst.v10i1.2823.
Texte intégralRésumé :
Circular economy is an economic ideal that has been concretized by the Vietnamese Government in the Law on Environmental Protection 2020. As a part of this model, plastic waste reuse and recycling are encouraged to extend the product life cycle. This study investigates the composition of recyclable plastic waste within the domestic waste sources in Can Tho city. The wastes were collected at waste gathering places, residential areas, markets, bus stations, and schools in the urban district of Ninh Kieu and suburban district of Cai Rang in Can Tho city. The results show that disposable plastic items are very diverse such as grocery bags, plastic bags, foam boxes, straws, drinking water bottles, etc. Plastic components accounted from 6.82 % in Cai Rang district to 14.89 % in Ninh Kieu district of the total waste. In which, LDPE plastic was the highest with 38.17 %, HDPE plastic and PETE plastic accounted for 20.81% and 4.89 %, respectively. Particularly, PETE is less found than other plastics as it is collected by scrap person at the disposal sources or by sanitation worker at the waste gathering place. PETE and HDPE plastics are completely recyclable, accounting for 25.70 %. In addition, LDPE plastic is also recyclable (38.17%) compared to other components. Thus, the recyclable plastic ratio of PETE, HDPE, and LDPE reaches 63.88 %. Meanwhile, non-recyclable plastics, accounted for 36.12 %, such as PS plastic (14.18 %), PP plastic (9.83 %) and other plastics (12.12 %). From the results, the amount of recyclable plastic discarded into the environment is nearly twice that of non-recyclable plastic. The potential to utilize recyclable plastics will most likely fit the circular economy model, which will both extend the product life cycle while limiting waste generation and minimizing adverse environmental impacts.