Artículos de revistas: "Wastewater management"

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Czikkely, Marton y Csaba Fogarassy. "Urban Wastewater Management in Focus of Heavy Metal Contamination". YBL Journal of Built Environment 6, n.º 1 (1 de septiembre de 2018): 103–13. http://dx.doi.org/10.2478/jbe-2018-0007.

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Abstract In our study, we focused on urban wastewater management, with special regard to the problems caused by heavy metal contaminations. Heavy metals function at low concentrations as a biogenic element, but at the same time in higher amounts (especially above the limit value) are considered as pollutants. We determined the basic wastewater treatment problem: which is the main problem of heavy metal contaminated urban wastewaters and how could eliminate heavy metals. We focused on wastewater origin heavy metal mobility in environment and effect (risk) on human health. In the following, we undertook to analyse urban wastewater in this direction.

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Liu, J. y M. Tang. "Wastewater management approach in an industrial park". Water Science and Technology 2017, n.º 2 (9 de abril de 2018): 546–51. http://dx.doi.org/10.2166/wst.2018.160.

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Abstract Many industrial parks adopt a two-tier wastewater management framework whereby tenants and the park are required to build satellite and centralized wastewater treatment facilities, respectively. Due to the diversity of industrial wastewaters, the treatment process scheme in the public centralized wastewater treatment plant (WWTP) may not suit the characteristics of all effluents discharged from the tenants. In consideration of varying wastewater biodegradability, the treatment scheme in a centralized WWTP is advised to install two series of treatment processes. In detail, various effluents from the tenants shall be commingled according to their levels of biodegradability. For the non-biodegradable streams, advanced oxidation processes shall be applied in addition to biological treatments. To facilitate the grouping of effluents, each effluent will be evaluated for its biodegradability. An analytical protocol derived from OECD standard (TG302B) was developed and found effective for biodegradability assessment. A case study is described in this paper to showcase the methodology.

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Gotvajn, Andreja Žgajnar y Jana Zagorc-Koncan. "Whole effluent and single substances approach: a tool for hazardous wastewater management". Water Science and Technology 37, n.º 8 (1 de abril de 1998): 219–27. http://dx.doi.org/10.2166/wst.1998.0328.

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Evaluation of toxicity and biodegradability or persistencey of different chemical substances and wastewaters is essential for their hazardous impact and risk assessment. Many various types of toxicity and biodegradation assessment tests are nowadays available for evaluation of the effects of pure substances and with proper combination of the tests, the prediction of the effect on the aquatic recipient is possible. On the other hand, there is a lack of agreed test procedures for estimating biodegradability of complex wastewaters. A methodology for wastewater characterisation employing single substance and whole effluent approach using stabilisation study is presented. The aim of the study was to establish the relationship between toxicity and biodegradability of phenol-formaldehyde industrial wastewater and its main constituents to evaluate presented methodology for hazardous wastewater management.

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Fernández, B., I. Seijo, G. Ruiz-Filippi, E. Roca, L. Tarenzi y J. M. Lema. "Characterization, management and treatment of wastewater from white wine production". Water Science and Technology 56, n.º 2 (1 de julio de 2007): 121–28. http://dx.doi.org/10.2166/wst.2007.480.

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During a 16 months period, the characteristics of the wastewaters generated in a Rias Baixas winery (Spain) producing white wine were determined: The characterization study showed that white wine wastewater had an average CODt and TSS values of 7.3 and 5.2 kg/m3, respectively being the ratio wastewater/wine produced of about 1.6–2.0 L/L and the ratio between load pollution and produced wine of 9.7 kgCODt/m3WINE. A strategy for the management of wastes and wastewaters allowed for an important reduction of a 55% of wastewater generation to be achieved. In order to select a suitable technology for the treatment of wastewaters two configurations were tested at pilot scale: i) An Anaerobic Filter (AF) of 430 L followed by an activated sludge unit of 510 L and: ii) one activated sludge unit of 510 L. The results showed that the anaerobic/aerobic configuration was more flexible as it adapted quickly to the different loads and flows produced during the different phases through the year. Besides it allowed higher COD removals (98.5–99.2%) to be achieved and proved to permit a quicker re-start up after starvation periods.

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Ochiai, E., T. Igarashi, S. Itou, H. Seya y S. Matsui. "Operation and management of the Fukashiba treatment plant". Water Science and Technology 53, n.º 11 (1 de mayo de 2006): 179–87. http://dx.doi.org/10.2166/wst.2006.351.

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Since the opening of the Fukashiba Treatment Plant in 1970, the number of industries and the amount of wastewater requiring treatment in the service area have been steadily increasing. In response to the recent economic downturn in Japan, these rates of increase have slowed, but are not decreasing. The pollution load in the wastewater from these industries has decreased and is now stable. Unlike the case of ordinary domestic sewage, the effects of the various types of substances contained in wastewaters delivered from the petrochemical complex to the treatment plant, for example, corrosion, are quite large. Measures to deal with corrosion problems, such as replacement or modification of the facilities, improvement of the efficiencies of facility operation and wastewater treatment, and improvement of measures against odours, are being implemented.

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Kang, Jian Cheng, Hai Lin, Jiong Zhu y Guo Dong Yan. "Wastewater Management in Shanghai". Advanced Materials Research 989-994 (julio de 2014): 5575–79. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.5575.

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In 1981~2012, the general urban wastewater in Shanghai was between 1.775~2.420 billion tons. Among the urban wastewater, the industrial wastewater emissions before 1988 was more than 1.4 billion tons, then, it was declining to about 649 million tons at 2002, a low value in the past 30 years, less than 50% of the 1980s. The percentage of industrial wastewater in the total urban wastewater discharge is falling from 76.9% in 1981 to under 30% in recent years. The living wastewater emissions increased from 424 million tons in 1981 to 1.697 billion tons in 2012. There is a relationship between the living wastewater increasing and the increase of the permanent residents in Shanghai. At the same time, the living wastewater emissions per capita per day were significantly increased from 100 kg (liter) around 1980s to around 190 kg (liter) in recent years. From 1995, the treatment and management of urban wastewater was continuing to intensify in Shanghai. The ratio of wastewater treating has increasing from 6.35% in 1995 to 85.62% of the total urban wastewater in 2012. Comparing the social-economic development and management of wastewater discharge in Shanghai, it can be seen, the wastewater emissions increasing amplitude was far less than the sizes of population growth and economic growth in the past 30 years

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Dogan, Bugce, Merih Kerestecioglu y Ulku Yetis. "Assessment of the best available wastewater management techniques for a textile mill: cost and benefit analysis". Water Science and Technology 61, n.º 4 (1 de febrero de 2010): 963–70. http://dx.doi.org/10.2166/wst.2010.006.

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In the present study, several water recovery and end-of-pipe wastewater treatment alternatives were evaluated towards the evaluation of Best Available Techniques (BATs) for the management of wastewaters from a denim textile mill in accordance with the European Union's Integrated Pollution Prevention and Control (IPPC) Directive. For this purpose, an assessment that translates the key environmental aspects into a quantitative measure of environmental performance and also financial analysis was performed for each of the alternatives. The alternatives considered for water recovery from dyeing wastewaters were nanofiltration (NF) with coagulation and/or microfiltration (MF) pre-treatment, ozonation or peroxone and Fenton oxidation. On the other hand, for the end-of-pipe treatment of the mill's mixed wastewater, ozonation, Fenton oxidation, membrane bioreactor (MBR) and activated sludge (AS) process followed by membrane filtration technologies were evaluated. The results have indicated that membrane filtration process with the least environmental impacts is the BAT for water recovery. On the other side, MBR technology has appeared as the BAT for the end-of-pipe treatment of the mill's mixed wastewater. A technical and financial comparison of these two BAT alternatives revealed that water recovery via membrane filtration from dyeing wastewaters is selected as the BAT for the water and wastewater management in the mill.

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Kalavrouziotis, Ioannis K. "Wastewater and Biosolids Management". Water Intelligence Online 16 (2017): 9781780408231. http://dx.doi.org/10.2166/9781780408231.

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Rusănescu, Carmen Otilia, Marin Rusănescu y Gabriel Alexandru Constantin. "Wastewater Management in Agriculture". Water 14, n.º 21 (22 de octubre de 2022): 3351. http://dx.doi.org/10.3390/w14213351.

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Considering the global climate changes that have disrupted the availability of fresh water and led to the emergence of drought, an effective management strategy for water quality must be implemented. In this work, we analyzed the possibility of used and treated water being reused and the effect of its use on soil on the development of plants. In the case of irrigation with treated wastewater, the following parameters increased: calcium carbonate equivalent, organic matter, content of phosphorus, calcium, potassium, sodium, nitrogen, biochemical oxygen consumption; chemical oxygen demand (COD), decreased sodium absorption rate, soil electrical conductivity, pH, magnesium content, and soil bulk density. Due to the micronutrients it contains, the use of treated wastewater in irrigation can be an organic fertilizer for the soil. Wastewater is a source of soil water supply. Untreated wastewater may contain, depending on the source (industry, pharmacies, medicine, households), toxic compounds, bacteria, viruses, and helminths, which, if used for long periods of time in irrigation, can have a negative impact on health and the environment, reaching the soil, the roots of the crops, and then the underground water. Therefore, these waters must be used after adequate treatment. Global climate change disrupts the availability of fresh water and negatively influences the occurrence of floods, droughts, and water quality, which is why any water source must be managed correctly.

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10

Shahraki, Abdol Aziz. "Managing urban wastewater to fight the pandemic of COVID-19 effectively". Health and Environment 3, n.º 1 (2021): 141–51. http://dx.doi.org/10.25082/he.2022.01.001.

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The paper reveals the role of wastewaters in the spread of Coronavirus in cities and focuses on the need for collection, treatment, and management of wastewaters. While the focus of the fight against COVID-19 is on the production of vaccines, drugs and treatments, this article emphasizes the cleanliness of the environment with wastewater management. This paper is a novel work, since it presents a multi-side research concerning fighting against coronavirus through wastewater collection and treatment. Studies show that coronavirus exists in urban wastewaters and spread the COVID-19 everywhere. Coronavirus is attacking people globally and shrinking the economy. The question addressed by this paper is; will communities overcome the coronavirus without well-collected and treated wastewaters? The methods to achieve the goals are theoretical surveys, case study strategy, mathematical modeling, statistical procedures, forecasting the future, and discussions. A mathematical model will be built to calculate the number of deaths caused by the coronavirus with the help of registered statistics and predict the future trend of the disease pandemic in Iran. Since Coronavirus has been seen in wastewaters, results of this research demonstrate the need for carefully collected and treated wastewaters to overcome the coronavirus. This paper gives suitable techniques to treat wastewater as stabilization ponds, bacterial reactors, and anaerobic ponds. Concluding, this paper suggests indicators to select a wastewater treatment technique in every city, and its outcome will assist the global community in fighting the coronavirus more successfully.

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Aleisa, Esra, Mohammad Al-Ahmad y Abdulla M. Taha. "Design and management of a sewage pit through discrete-event simulation". SIMULATION 87, n.º 11 (7 de marzo de 2011): 989–1001. http://dx.doi.org/10.1177/0037549711398262.

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This paper reports two discrete-event simulation studies to model the activities of a residential waste treatment facility and prepare it to accept additional wastewaters through tanker trucks. The first simulation study models the wastewater treatment facility to ensure its ability to handle the planned added capacity arriving through the pit, while the second study simulates various managerial strategies to handle the traffic, testing, and unload procedures of tanker trucks arriving at the facility. The simulation models were statistically validated and the outcomes of the study were implemented in reality. The wastewater treatment facility extension suggested by this study was implemented and launched in mid 2008 to accept residential wastewater tanker trucks. This has saved the environment over 6,000 m3 daily from being dumped into the open unlined terrestrial landfills. Simulation proved to be an excellent tool in the facility planning effort, as it ensured smooth flow lines of tanker truck load discharge and the best utilization of facilities on site.

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Mattila, H., E. Santala y J. Aho. "Consumer managed co-operative - a solution for progressing wastewater management in rural areas". Water Science and Technology 48, n.º 11-12 (1 de diciembre de 2004): 385–91. http://dx.doi.org/10.2166/wst.2004.0886.

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In Finland the question of appropriate wastewater treatment in rural areas has become very prominent during the last years. The new Environmental Protection Act stipulates that wastewaters must be treated to the extent that they cannot have a negative impact on nature. The Ministry of the Environment is currently preparing a decree specifying the requirements. The draft of the decree proposes that on-site treatment units should decrease the BOD load by 90, total phosphorus load by 85 and total nitrogen load by 40 per cent. To meet the new requirements, the old systems that include septic tanks only need more efficient wastewater treatment methods. Whatever technical solution is selected, the house owner must pay for it. At the moment, even the septic tanks are emptied and maintained irregularly. More sophisticated wastewater treatment methods definitely need more maintenance, which cannot be made the sole duty of the house owners. One potential organisational alternative for managing wastewater treatment in rural areas is the co-operative. Finland has one such pioneering co-operative formed for on-site sanitation. Varsinais-Suomi Water Services Co-operative provides the house owner with professional assistance in wastewater treatment at a reasonable cost. Suvisaari Water Services Co-operative is another new organisation selling sewerage services to its members. But its technology is different: this co-operative operates an LPS-sewerage system instead of on-site treatment.

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13

Vishwakarma, Smily y Dharmendra. "A Critical Review on Economical and Sustainable Solutions for Wastewater Treatment Using Constructed Wetland". Civil and Environmental Engineering Reports 32, n.º 3 (1 de septiembre de 2022): 260–84. http://dx.doi.org/10.2478/ceer-2022-0040.

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Abstract Pollutant removal by the mechanism of constructed wetland has led to low cost, highly efficient wastewater treatment technology. Constructed wetlands (CWs) are artificial engineered systems that mimic like natural wetlands. CW’s have been used in previous research to treat a broad range of waste streams at large-scale for low-cost application in wastewater management. Generally, the most literature has targeted a particular class of mechanism or the other due to lack of generalized techniques for wastewater management using CWs. This work focuses on to introductory information and review on concept of CWs based on the latest mechanisms for the wastewater treatment to inspire economical and sustainable solutions to water based environmental problems. This research emphasis CW mechanism, construction, design, and applications of CWs as well as optimization of CWs for the treatment of wastewater. This review also highlights the study with different treatment stages of CWs for removing pollutants from different types of wastewaters.

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14

Campos, José Luis, Anuska Mosquera-Corral, Ángeles Val del Rio y Alba Pedrouso. "Sustainable Wastewater Management and Treatment". Sustainability 14, n.º 15 (26 de julio de 2022): 9137. http://dx.doi.org/10.3390/su14159137.

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This Special Issue of Sustainability aims to report the recent developments in Sustainable Wastewater Management and Treatment, mainly those focused on improving the overall performance of wastewater treatment plants (WWTPs) in terms of both reducing their environmental impact and integrating them into the urban circular economy [...]

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Economopoulou, M. A. y A. P. Economopoulos. "Expert system for municipal wastewater management with emphasis in reuse". Water Supply 3, n.º 4 (1 de agosto de 2003): 79–88. http://dx.doi.org/10.2166/ws.2003.0048.

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This paper presents a methodology that uses a knowledge base and inference procedures for developing rational wastewater management schemes for small to medium size communities with emphasis in the protection of human health, the reuse of treated wastewater, and the pollution minimization of water receivers. The system provides an optimal year-round treatment/reuse/disposal plan, which maximizes the wastewater reuse for irrigation, meets the applicable minimum municipal wastewater treatment requirements and observes the water quality standards of receivers with the minimum treatment costs. The solution is dynamic in the sense that varying monthly design values can be assigned to the input variables used in the computation of irrigation requirements, assimilative capacity of receivers and performance of natural systems. The above procedure shows that the use of multiple receivers over the year is often highly advantageous; combining for example the increased treatment efficiency and reuse potential for irrigation during summer with the increased assimilative capacity of a river during winter. The expert system incorporates a number of design and ambient quality models, for which graphical solutions have been developed, so as to enable manual application if desired. The entire procedure is implemented in an integrated computer program that facilitates and refines problem solution. The expert system provides interactive guidance for collecting the necessary field information. Finally, the results of a case study for the management of wastewaters from the six communities of the Municipality of Keramoti are presented.

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Lindsey, Alfred W., Stephen Allbee, Gregory Beatty, Kevin Weiss y James Horne. "NEW DIRECTIONS IN WASTEWATER MANAGEMENT". Proceedings of the Water Environment Federation 2000, n.º 13 (1 de enero de 2000): 432–40. http://dx.doi.org/10.2175/193864700784607893.

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Prochaska, Charikleia. "Special Issue: Municipal Wastewater Management". Sustainability 13, n.º 14 (7 de julio de 2021): 7588. http://dx.doi.org/10.3390/su13147588.

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Markovič, Gabriel. "Wastewater management using artificial intelligence". E3S Web of Conferences 45 (2018): 00050. http://dx.doi.org/10.1051/e3sconf/20184500050.

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The subject matter, as well as the objectives of this article, was the usage and the modelling of the rainwater management process using artificial intelligence. The article deals with the research on how and why water should be used more effectively whether it is rainwater or greywater. In Slovakia, the usage of rainwater or greywater is not so popular. However, such usage has many advantages from an ecological, economical and technical viewpoint. In this article, a proposal was created of rainwater usage in a school building and this usage was realized by using Fuzzy cognitive maps. Fuzzy cognitive maps represent a well-oriented and evaluated diagram and it helped us to create a concrete process of water usage. The output of this experiment will be the decision system for the most effective use of water in a building, as well as the most effective way for the recycling of wastewater in buildings.

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El‐Gohary, F., S. Abu El‐Ela, F. Nasr, H. El‐Kamah y R. Abdel Wahaab. "Industrial wastewater management: case study". International Journal of Environmental Studies 56, n.º 1 (31 de diciembre de 1998): 29–39. http://dx.doi.org/10.1080/00207239808711193.

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El-Fadel, M. y M. Massoud. "Methane emissions from wastewater management". Environmental Pollution 114, n.º 2 (septiembre de 2001): 177–85. http://dx.doi.org/10.1016/s0269-7491(00)00222-0.

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Al-Muzaini, Saleh. "Industrial wastewater management in Kuwait". Desalination 115, n.º 1 (marzo de 1998): 57–62. http://dx.doi.org/10.1016/s0011-9164(98)00026-5.

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Alvarez-Vázquez, L. J., N. García-Chan, A. Martínez y M. E. Vázquez-Méndez. "Stackelberg strategies for wastewater management". Journal of Computational and Applied Mathematics 280 (mayo de 2015): 217–30. http://dx.doi.org/10.1016/j.cam.2014.11.061.

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23

O. B., Akpor. "Wastewater Management, Recycling and Discharge". Hydrology 3, n.º 3 (2015): 33. http://dx.doi.org/10.11648/j.hyd.20150303.11.

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24

Kärrman, Erik. "Strategies towards sustainable wastewater management". Urban Water 3, n.º 1-2 (marzo de 2001): 63–72. http://dx.doi.org/10.1016/s1462-0758(01)00018-8.

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Berthouex, P. M. "Information management for wastewater treatment". ISA Transactions 31, n.º 1 (enero de 1992): 35–51. http://dx.doi.org/10.1016/0019-0578(92)90008-7.

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Vasylkivskyi, Igor, Vitalii Ishchenko, Halyna Sakalova, Garcia Camacho Hernan Ullianodt y Stepan Polyvanyi. "Municipal wastewater management in Ukraine". DESALINATION AND WATER TREATMENT 288 (2023): 159–64. http://dx.doi.org/10.5004/dwt.2023.29379.

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Liamlaem, W., L. Benjawan y C. Polprasert. "Sustainable wastewater management technology for tourism in Thailand: case and experimental studies". Water Science and Technology 79, n.º 10 (15 de mayo de 2019): 1977–84. http://dx.doi.org/10.2166/wst.2019.200.

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Abstract Thailand has adopted the concept of eco-tourism as a protocol to protect environmental resources. One of the key factors in enabling the achievement of this goal is the improvement of the quality of effluent from those homestays and resorts which still lack efficient on-site wastewater treatment. This research utilized case studies of subsurface flow constructed wetlands (SFCWs), planted mainly with the Indian shot (Canna indica L.), which were designed to treat wastewaters at three resorts located in Amphawa District, Samut Songkram Province in central Thailand. The results showed that the treated effluent was of sufficient quality to meet the building effluent standards Type C, which require the concentrations of biological oxygen demand (BOD), total Kjeldahl nitrogen (TKN) and suspended solids (SS) to be less than 40, 40 and 50 mg/L, respectively. In addition, the first-order kinetic constants for the design and operation of SFCWs were determined. For treating wastewater containing organic substances, with no prior pre-treatment, the first-order kinetic constant of 0.24 1/d can be applied to predict effluent quality. For treating other types of domestic wastewater, a first-order kinetic constant in the range 0.40–0.45 1/d can be used when sizing and operating SFCWs. This research highlights the great potential of SFCWs as a sustainable wastewater management technology.

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Yavuzcan Yıldız, Hijran y Serap Pulatsü. "Towards zero waste: Sustainable waste management in aquaculture". Ege Journal of Fisheries and Aquatic Sciences 39, n.º 4 (15 de diciembre de 2022): 341–48. http://dx.doi.org/10.12714/egejfas.39.4.11.

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Increases in aquaculture production due to higher demand for aquatic foods result in an increase in the amount of aquaculture wastewater. This situation highlights the need for the effective treatment of wastewater in sustainable aquaculture. Today, instead of traditional physical and chemical methods in the treatment of wastewater originating from aquaculture, ecosystem-sensitive and by-product-oriented systems have begun to be adopted. The main principle of the zero-waste approach is the recycling of the nutrients in the wastewater to produce another food. In this new innovative approach, the production of other organisms from the different trophic levels using the wastewater of aquaculture in the integrated multi-trophic systems (such as aquaponics) is possible to recycle the nutrients. It has been considered the integrated multi-trophic systems (IMTA) more valuable as these systems can be used both in environment-friendly wastewater treatment and in the conversion of nutrients in wastewater to biomass. The nutrients such as nitrogen and phosphorus in aquaculture wastewater can be utilized to produce two organisms (i.e. fish+mussel) or three organisms (i.e. fish+mussel+seaweed) through IMTA. Aquaculture wastewater can be used to reduce the nutrients in constructed wetlands and plant lagoons representing the reasonable approach for sustainable aquaculture and wastewater treatment. Here, the innovative approach to sustainable aquaculture wastewater treatment was reviewed for the current and innovative technologies. It was emphasized that the need for environment-friendly wastewater treatment Technologies such as aquaponics, enlargement of constructed wetlands, or increase in using the integrated multi-trophic production systems (IMTA) in practice are recommended for sustainable aquaculture.

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Jain, Keerti, Anand S. Patel, Vishwas P. Pardhi y Swaran Jeet Singh Flora. "Nanotechnology in Wastewater Management: A New Paradigm Towards Wastewater Treatment". Molecules 26, n.º 6 (23 de marzo de 2021): 1797. http://dx.doi.org/10.3390/molecules26061797.

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Clean and safe water is a fundamental human need for multi-faceted development of society and a thriving economy. Brisk rises in populations, expanding industrialization, urbanization and extensive agriculture practices have resulted in the generation of wastewater which have not only made the water dirty or polluted, but also deadly. Millions of people die every year due to diseases communicated through consumption of water contaminated by deleterious pathogens. Although various methods for wastewater treatment have been explored in the last few decades but their use is restrained by many limitations including use of chemicals, formation of disinfection by-products (DBPs), time consumption and expensiveness. Nanotechnology, manipulation of matter at a molecular or an atomic level to craft new structures, devices and systems having superior electronic, optical, magnetic, conductive and mechanical properties, is emerging as a promising technology, which has demonstrated remarkable feats in various fields including wastewater treatment. Nanomaterials encompass a high surface to volume ratio, a high sensitivity and reactivity, a high adsorption capacity, and ease of functionalization which makes them suitable for application in wastewater treatment. In this article we have reviewed the techniques being developed for wastewater treatment using nanotechnology based on adsorption and biosorption, nanofiltration, photocatalysis, disinfection and sensing technology. Furthermore, this review also highlights the fate of the nanomaterials in wastewater treatment as well as risks associated with their use.

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Galib, Shams M., A. B. M. Mohsin, Md Taskin Parvez, Martyn C. Lucas, Nipa Chaki, Sadman S. Arnob, Md Istiaque Hossain y M. Nazrul Islam. "Municipal wastewater can result in a dramatic decline in freshwater fishes: a lesson from a developing country". Knowledge & Management of Aquatic Ecosystems, n.º 419 (2018): 37. http://dx.doi.org/10.1051/kmae/2018025.

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Impacts of ineffective wastewater management on the biodiversity of receiving waters in developing countries are poorly documented. Using a before-after-control-impact methodology, we measured the effects of untreated wastewater release on the fish community in the Barnoi River, Bangladesh. In 2006, prior to untreated wastewater discharge, fish abundance, species richness and water quality were similar across sampling sites. In 2016, after 8 years of wastewater release to the downstream reach, fish abundance and species richness were reduced by >47% and >35% respectively at downstream sites compared to unaffected upstream sites and >51% and >41% lower respectively compared to the pre-wastewater discharge period. The wastewater impact was particularly severe during months of low discharge (October–December). Water transparency, dissolved oxygen and pH were lower (P < 0.001) at impacted downstream sites compared to upstream sites. Nineteen species (41.3% of all species we recorded) are threatened in Bangladesh and the abundance of these species, except one, decreased significantly (P < 0.05) at the impacted sites. We recommend improved wastewater management by applying primary treatment facilities and incorporating reedbed filtration as a mean of biological treatment, into the canals carrying wastewaters. The success of such measures should be tested with fish species that were most responsive to wastewater, using the indicator species concept.

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Ozgun, H., N. Karagul, R. K. Dereli, M. E. Ersahin, T. Coskuner, D. I. Ciftci, I. Ozturk y M. Altinbas. "Confectionery industry: a case study on treatability-based effluent characterization and treatment system performance". Water Science and Technology 66, n.º 1 (1 de julio de 2012): 15–20. http://dx.doi.org/10.2166/wst.2012.094.

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Source-based wastewater characterization and stream segregation provide effective management of industrial wastewaters. The characterization of wastewater sources from a confectionery factory was presented and performance of the wastewater treatment plant was evaluated in this study. All of the wastewater sources in the factory, except the vacuum water line, can be characterized by high concentrations of soluble pollutants and low pH. High organic content of the wastewater generated from the confectionery industry promoted the application of anaerobic technology as a pre-treatment before the conventional aerobic treatment. The average chemical oxygen demand (COD) removal and biogas production for expanded granular sludge bed reactor were 88% and 1,730 Nm3/day, respectively. The effluent from the investigated facility can be used for irrigation provided that conductivity values are within acceptable limits.

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Hamoda, Mohamed F. y Saed M. Al-Awadi. "Wastewater management in a dairy farm". Water Science and Technology 32, n.º 11 (1 de diciembre de 1995): 1–11. http://dx.doi.org/10.2166/wst.1995.0387.

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Field sampling and laboratory experimentation were conducted on wastewater effluent generated at a dairy farm in order to characterise the wastewater, evaluate existing primary treatment facilities, and examine an appropriate wastewater treatment system to produce good quality effluents. It has been found that the farm contributes effluents containing considerable loads of organics, solids and nutrient pollutants. Existing treatment facilities which are limited to batch-operated primary settling tanks, are not capable of producing good quality effluent. Experimentation on an aerobic, suspended growth, biological system using sequencing batch reactors (SBR) indicated that the pollutant loads in the primary-treated effluent could be substantially reduced. The study showed that a wastewater treatment system involving primary settling tanks combined with additional aerobic biological treatment is capable of removing about 94% COD and 96% SS from the farm effluents. This system could be easily integrated and coordinated with existing facilities. A wastewater management scheme has been proposed to include waste minimisation, waste treatment and effluent reuse in irrigation.

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Eckenfelder, W. Wesley y A. J. Englande. "Innovative biological treatment for sustainable development in the chemical industries". Water Science and Technology 38, n.º 4-5 (1 de agosto de 1998): 111–20. http://dx.doi.org/10.2166/wst.1998.0596.

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This paper presents a perspective of wastewater management in the chemical industries as related to sustainable development. The scope of wastewater management must therefore further be expanded to include the concept of ecological integrity of receiving waters. Ecological integrity of receiving waters is compromised by contaminants which are not effectively removed by Best Conventional Technology (BCT). Biological treatment typically offers the most cost-effective conversion and/or stabilization of wastewaters; however, modifications must be employed in the design and operation to provide satisfactory effluent quality. Enhanced treatment techniques for wastewaters containing high organic concentrations, VOCs, elevated TDS levels, toxics and priority pollutants are discussed. The importance of design and operational procedures including pretreatment technologies, two stage vs. single stage activated sludge, selector design and maximum specific oxygen uptake rate determinations are also presented.

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34

Tangsubkul, Natthira, Stephen Moore y T. David Waite. "Incorporating phosphorus management considerations into wastewater management practice". Environmental Science & Policy 8, n.º 1 (febrero de 2005): 1–15. http://dx.doi.org/10.1016/j.envsci.2004.08.009.

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35

Postaue, Najla, Jhessica Marchini Fonseca, Rosangela Bergamasco y Camila da Silva. "Impact of biodiesel production on wastewater generation". Engenharia Sanitaria e Ambiental 27, n.º 2 (abril de 2022): 235–44. http://dx.doi.org/10.1590/s1413-415220210086.

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ABSTRACT Biodiesel production has intensified in recent years and the traditionally applied method for its production is homogeneous alkaline transesterification, with the formation of esters and glycerol, which need to be separated. Also, the crude biodiesel needs to be purified at the end of the reaction to remove the remaining catalyst, glycerol, soap, oil, and alcohol, which can impair engine performance. This process generates large quantities of wastewater that need to be properly disposed of to avoid polluting the environment. This article provides a review of the biodiesel production process and the need for a purification step, focusing on wastewater generation. Traditional and advanced methods for treating wastewater originating from biodiesel production are described and discussed. Details regarding patents published in the past 5 years, related to techniques for the treatment of these wastewaters, are also included.

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Kligerman, Débora Cynamon, Aline Stelling Zanatta, Graziella de Araújo Toledo y Joseli Maria da Rocha Nogueira. "Path toward Sustainability in Wastewater Management in Brazil". International Journal of Environmental Research and Public Health 20, n.º 16 (18 de agosto de 2023): 6597. http://dx.doi.org/10.3390/ijerph20166597.

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Developing countries have not carried out the adequate management of wastewater and are a long way off meeting the sustainability goal of universal access to safely managed sanitation services by 2030. This article discusses sustainability in wastewater management and conducts a narrative literature review to analyze four stages on the path toward sustainability: (1) the prevention of or reduction in pollution at the source; (2) wastewater collection and treatment; (3) using wastewater as an alternative source of water; and (4) the recovery of useful by-products. It also provides an overview of wastewater management in Brazil and shows the advantages of using wastewater to produce biofuel in a country in which 48.3% of energy production comes from renewable sources.

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Chang, L. J., P. Y. Yang y S. A. Whalen. "Management of Sugarcane Mill Wastewater in Hawaii". Water Science and Technology 22, n.º 9 (1 de septiembre de 1990): 131–40. http://dx.doi.org/10.2166/wst.1990.0075.

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Current sugarcane mill wastewater management system in Hawaii was surveyed at Oahu Sugar Co. on the island of Oahu. Problems generated from the improper wastewater management such as odor nuisance, field silting, crop reduction and large land requirement, motivate a new management system for Hawaiian sugar industry. Based on the results of preliminary laboratory treatment on sugarcane wastewater, and the cost analysis for different alternatives, an appropriate wastewater management system for Hawaiian sugar industry is recommended. This system incorporates sedimentation, anaerobic pretreatment(UASB), and aerobic polishing(EAFB) for anaerobically treated effluent. It efficiently(≥99%) removes the organics and solids in wastewater within 2 days of hydraulic retention time provided. Therefore, the problems generated from the present treatment facility can be eliminated by implementing the proposed management system. More importantly, reuse of the properly treated wastewater for drip irrigation and cane washing will provide extra profit for the Hawaiian sugar industry.

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38

Gupta, P. K. "ENVIRONMENTAL MANAGEMENT IN THE AGRO-BASED PULP AND PAPER INDUSTRY IN INDIA – A HOLISTIC APPROACH". Water Science and Technology 30, n.º 3 (1 de agosto de 1994): 209–15. http://dx.doi.org/10.2166/wst.1994.0103.

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The agro-residue based pulp and paper industry generates high strength and high volume wastewaters, which in the absence of techno-economically viable chemical recovery systems and cost-effective pollution control systems pollute the recipient environment. The use of the “end of pipe” treatment approach results in a complex wastewater system and imposes a very high economic burden on these units. A more pertinent approach is to incorporate “at source” pollution prevention measures prior to the design of the end-of-pipe wastewater treatment facility. This cleaner production/waste minimisation approach not only results in direct financial returns in the form of material conservation and recovery/reuse of fibres but also reduces the overall investment and annual operational costs of the subsequent wastewater treatment system. Studies at four paper mills where appropriate technologies for waste reduction and handling, and energy conservation have been demonstrated and implemented, are presented. The paper highlights the various in plant measures viz. process modification and recovery/recycle/reuse of resources, which can be used to reduce the total pollution load. These measures lead to increases in profit margin of up to 20% and reduced wastewater treatment costs of up to 30%. To illustrate this approach, a case study in a 25 TPD mill has been discussed.

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39

Yousuf, Sumra, Payam Shafigh, Zakaria Che Muda, Herda Yati Binti Katman y Abid Latif. "Alternatives for Fresh Water in Cement-Based Materials: A Review". Water 15, n.º 15 (4 de agosto de 2023): 2828. http://dx.doi.org/10.3390/w15152828.

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Huge amounts of fresh water are used in the concrete industry every day. The quantity and quality of water play important roles in determining the quality, strength, setting time, and durability of cement-based materials (CBMs), such as paste, mortar, and concrete. Freshwater systems are under pressure due to climate changes, industrialisation, population growth, urbanisation, and the lack of proper water resource management. The lack of potable water has resulted in the search for possible alternatives, such as seawater, treated industrial wastewater, treated sewage wastewater, carwash service station wastewater, wastewater from ready-mix concrete plants, and wastewater from the stone-cutting industry. All of these water resources can be used in concrete to achieve adequate industry standards for the physical and chemical characteristics of concrete. This study is a comprehensive review of the existing information regarding the effects of alternate water resources on the fresh, physical, strength, and durability properties of CBMs. The review shows that the research on the utilisation of wastewater in CBMs is limited. The development of different procedures and methods is urgently needed to utilise various wastewaters in concrete production. The usage of various wastewaters in concrete construction overcomes their adverse impacts on the environment and human health.

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40

Zessner, M., R. Fenz y H. Kroiss. "Wastewater management in the Danube Basin". Water Science and Technology 38, n.º 11 (1 de diciembre de 1998): 41–49. http://dx.doi.org/10.2166/wst.1998.0432.

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In the framework of the Environmental Program for the Danube River Basin financed by the PHARE-program of the EC-Commission the study “Nutrient Balances for Danube Countries” was carried out by the Department of Water and Wastewater Engineering of the Budapest University of Technology and the Institute for Water Quality and Waste Management of the Vienna University of Technology. Expert teams from seven further countries from the Danube Basin completed the team for the project. A crucial part of this study was the evaluation of the present situation of wastewater management of the different countries and the evaluation of future strategies for wastewater management in the context of nutrient balances. This paper presents the developed methodology for wastewater management and the results of its application to the Danube catchment. The major conclusions of the study are: to postpone sewer construction unless hygienic reasons and/or drinking water protection require it and to aim at upgrading treatment efficiency; an ambient water quality principle requires high treatment efficiency in many cases and by introducing nutrient removal at municipal wastewater treatment plants about 20% of the total nutrient emissions to surface waters can be removed.

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41

Bello, Ibrahim Adebayo. "CHALLENGES IN TEXTILE WASTEWATER AND CURRENT PALLIATIVE METHODS: AN OVERVIEW". IIUM Engineering Journal 18, n.º 2 (1 de diciembre de 2017): 71–78. http://dx.doi.org/10.31436/iiumej.v18i2.742.

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Effluents from dye and textile industries are highly contaminated and toxic to the environment. High concentration of non-biodegradable compounds contributes to increased biochemical oxygen demand (BOD) and chemical oxygen demand (COD) of the wastewater bodies.Â Dyes found in wastewater from textile industries are carcinogenic, mutagenic or teratogenic. Biological processes involving certain bacteria, fungi, activated carbon and carbon nanotubes (CNTs) are promising methods for treating the waste water. These methods are either inefficient or ineffective.Â These complexities necessitates search for new approaches that will offset all the shortcomings of the present solutions to the challenges faced with textile wastewater management. This article reviews the past and recent methods used in the treatment of the textile dye wastewater and the future opportunities for efficient treatment of textiles wastewaters.

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42

Pareek, N. K. "Industrial Wastewater Management in Developing Countries". Water Science and Technology 25, n.º 1 (1 de enero de 1992): 69–74. http://dx.doi.org/10.2166/wst.1992.0011.

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Most developing countries around the globe are striving hard for a fast economic growth and associated industrialization. As a result, numerous industries are emerging mostly in the urban areas of developing countries. The wastewater, which is an obvious byproduct of all industries, receives lower priority in developing countries. The plant designer and supplier normally provide an in-built pollution control system for new industries. The peripheral facilities, like wastewater treatment, suffer due to limited financial resources. In addition, other factors such as lack of experience in operation, management and plant repairs, lack of spare parts, frequent shortage of power/fuel, lack of end products disposal facilities, social and political reasons contribute to inadequate wastewater management in developing countries. Absence of industrial effluent standards and corresponding legislation for enforcing them are common in developing countries. Environmental impact assessment studies for the industrial growth are commonly not carried out in developing countries. Public awareness against pollution is also at a low profile in developing countries. The industrial wastewater problems in developing countries are discussed in this paper with some typical examples. The critical appraisal of the industrial wastewater management situation in developing countries is concluded by recommendations for the course of action.

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43

Apedaile, Erik. "A Perspective on Biosolids Management". Canadian Journal of Infectious Diseases 12, n.º 4 (2001): 202–4. http://dx.doi.org/10.1155/2001/801432.

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Wastewater treatment has evolved into an important mechanism that used to protect public health from infectious disease. In the 1850s, water drawn from the Thames River below London's sewage outfall was found to be a source of a cholera outbreak (1). As a result, 'sewage farms' were established to treat and dispose of wastewater. Gradually, more effective technologies, which required less land, were developed to treat wastewater. The processes of primary and secondary biological treatment eventually eliminated the need for sewage farms in the early part of the past century.

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44

Shelef, Gedaliah. "Wastewater Reclamation and Water Resources Management". Water Science and Technology 24, n.º 9 (1 de noviembre de 1991): 251–65. http://dx.doi.org/10.2166/wst.1991.0254.

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Wastewater reclamation and reuse are becoming important components of the management of urban, regional and national water resources. Recently, not only countries with chronic water shortage, but also urban areas in temperate climates have considered and implemented wastewater reuse schemes expanding the scope of consumptive uses to include toilet flushing and landscape irrigation, using dual distribution systems and even the reuse as potable waters is being considered and evaluated. Israel is an example of intensive reuse in agricultural irrigation and much experience has been gained in treatment, seasonal reservoirs and establishing quality requirements. The economical justification of wastewater reuse schemes should take into account the overall treatment costs, the ‘environmental and health allowances', i.e. the cost of treatment required even when reuse is not practiced, the benefits of water and the savings in conveyance and pumping. The paper also briefly describes the two largest wastewater reclamation projects in Israel, namely: the Kishon Complex Scheme and the Dan Region Scheme, both aimed at unrestricted agricultural irrigation of all crops.

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45

Smith, E. L., V. Rodd, B. McDonald, D. Chase, H. Niu, C. Gallagher, L. Kellman y M. Vankoughnett. "Seasonal Considerations for Year-Round Operation of On-Farm Wetlands in Temperate Climates: A Review". Journal of Agricultural Science 13, n.º 12 (15 de noviembre de 2021): 1. http://dx.doi.org/10.5539/jas.v13n12p1.

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On-farm constructed wetlands (CW) have been increasing in application over the past several decades to treat a variety of agricultural wastewaters. These systems have been found to be relatively low cost, require minimal maintenance, and provide a very efficient and sustainable means of treating harmful contaminants during the warm seasons before reaching nearby waterways. With farm size increasing in many regions and more waste being generated, it becomes increasingly important to have a viable means of treating wastewaters on a year-round basis. However, temperate climates can present challenges in the treatment of these wastewaters. This paper aims to bring together and review previous research on the use of CWs for treating agricultural wastewater in temperate climates where below freezing temperatures can exist. Focus is placed on the use of various wetland designs, wastewater types, management practices, maintenance, operational challenges and overall treatment capacities. This study highlights the need to carefully consider several factors (i.e. waste type, design, climate, vegetation, management) before using these systems for year-round treatment. Continued research in wetland management will be key in getting wide scale adoption from the agricultural community in temperate climates.

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46

Alzahrani, Abdullah I. A., Sajjad Hussain Chauhdary y Abdulrahman A. Alshdadi. "Internet of Things (IoT)-Based Wastewater Management in Smart Cities". Electronics 12, n.º 12 (8 de junio de 2023): 2590. http://dx.doi.org/10.3390/electronics12122590.

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Wastewater management is a mechanism that is used to extract and refine pollutants from wastewater or drainage that can be recycled to the water supply with minimal environmental effects. New methods and techniques are required to ensure safe and smart wastewater management systems in smart cities because of the present deteriorating environmental state. Wireless sensor networks and the Internet of Things (IoT) represent promising wastewater treatment technologies. The elaborated literature survey formulates a conceptual framework with an Internet of Things (IoT)-based wastewater management system in smart cities (IoT-WMS) using blockchain technology. Blockchain technology is now being used to store information to develop an incentive model for encouraging the reuse of wastewater. Concerning the quality and quantity of recycled wastewater, tokens are issued to households/industries in smart cities. Nevertheless, this often encourages tampering with the information from which these tokens are awarded to include certain rewards. Anomaly detector algorithms are used to identify the possible IoT sensor data which has been tampered with by intruders. The model employs IoT sensors together with quality metrics to measure the amount of wastewater produced and reused. The simulation analysis shows that the proposed method achieves a high wastewater recycling rate of 96.3%, an efficiency ratio of 88.7%, a low moisture content ratio of 32.4%, an increased wastewater reuse of 90.8%, and a prediction ratio of 92.5%.

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Nguyen, Quoc Khanh y Quang Vang Dang. "Management solutions and improvement on wasted water quality". TẠP CHÍ KHOA HỌC TRƯỜNG ĐẠI HỌC QUỐC TẾ HỒNG BÀNG 21 (1 de enero de 2023): 159–68. http://dx.doi.org/10.59294/hiujs.21.2023.6.

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Social development, the amount of domestic and industrial wastewater also increases exponentially. However, the centralized treatment systems are not enough to deal with (As of the end of 2018, the percentageg of domestic wastewater and industrial wastewater collected and treated in Vietnam are low at 13%, 88% and 15.8% respectively) impairing the quality and amount of surface water sources, affects the quality of groundwater resources, ecosystems, and threatens water security. This has been affecting the daily life and production of the people. To mitigate this situation, wastewater reuse is seen as an effective and appropriate solution for the city. The above situation requires the State to have regulations and circulars guiding the reuse of wastewater, improve regulations and standards to suit the current situation, gradually reduce pollution and protect the water environment.

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Tociu, Carmen, Cristina Maria, Ecaterina Marcu y Irina-Elena Ciobotaru. "The Influence of Wastewater from Paper Mills on the Biological Process in the Municipal Wastewater Treatment Plant". Revista de Chimie 70, n.º 7 (15 de agosto de 2019): 2388–91. http://dx.doi.org/10.37358/rc.19.7.7346.

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Wastewaters resulting from paper mills have high organic loading that in most cases exceeds the maximum limits allowed for their discharge in the aquatic environment. In the context of concerns regarding the sustainable development of water resources, the identification of solutions for the optimal management of effluent treatment is a challenge of the modern society. This paper depicts the biological treatability of wastewaters resulting from the manufacturing of recycled paper and discusses their effect on the biological process after their admission in the municipal wastewater treatment plant. The Symons criterion and the Zahn-Wellens method were employed in order to study the biodegradability of organic substances as they are useful tools for prefiguring the behaviour of wastewaters during the secondary treatment step.

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El-Gohary, Fatma A., Sohair I. Abo-ElEla y Hamdi I. Ali. "Wastewater Management in the Automobile Industry". Water Science and Technology 21, n.º 4-5 (1 de abril de 1989): 255–63. http://dx.doi.org/10.2166/wst.1989.0228.

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Wastewater from an automobile manufacturing company provides the material of this study. Separate treatment of cyanide-bearing wastes, end-of-pipe effluent and sewage versus collective treatment of the three wastes was evaluated. Experimental results indicated that high quality effluent could be obtained using the two proposed schemes. Furthermore, the initial as well as the current costs for both alternatives were almost the same. However, biological treatment is recommended since it solves the problem of the wastes in the plant using one treatment system which can be easily controlled.

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Teodosiu, Carmen y Lidy E. Fratila-Apachitei. "SUSTAINABLE ALTERNATIVES FOR PETROCHEMICAL WASTEWATER MANAGEMENT". Environmental Engineering and Management Journal 1, n.º 1 (2002): 21–34. http://dx.doi.org/10.30638/eemj.2002.003.

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