Bibliografie tematiche / Water purification research

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Letteratura scientifica selezionata sul tema "Water purification research"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 21 febbraio 2023

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Articoli di riviste sul tema "Water purification research"

1

Dvoinikova, A. V., e O. I. Filipovskaya. "RESEARCH ON PURIFICATION, DISINFECTION AND ENRICHMENTOF NATURAL WATER". Oil and Gas Studies, n. 2 (1 maggio 2017): 89–92. http://dx.doi.org/10.31660/0445-0108-2017-2-89-92.

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The article emphasizes that the proposed method of natural water purification with natural sorbents is more effective than purification with artificial sorbents. This will give the opportunity not only to get rid of contaminants, but also disinfect and enrich water with natural chemical elements.
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2

陈, 馨彤. "Research Progress of Water Hyacinth on Wastewater Purification". Advances in Environmental Protection 11, n. 05 (2021): 1020–25. http://dx.doi.org/10.12677/aep.2021.115122.

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3

Du, Xin Yu. "Research on Swimming Pool Water Treatment Based on Embedded System". Applied Mechanics and Materials 539 (luglio 2014): 644–47. http://dx.doi.org/10.4028/www.scientific.net/amm.539.644.

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This paper mainly designs the outdoor swimming pool circulation purification system, introduced the circulation mode selection, calculation of water cycle, and we proposed water purification treatment measures. After filtration and disinfection of swimming pool water, which achieve the "Hygienic standard for swimming place" (GB9667-1996) that regulations on "the quality and hygiene standards" artificial swimming pool, which can be recycled.
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4

Liu, Hai Jiao, Ming Yuan Fan, Yu Zhi Shi e Xiao Feng Yang. "Research on Connected Water Body Self-Purification Capacity Simulation and Effect Analysis". Applied Mechanics and Materials 737 (marzo 2015): 715–18. http://dx.doi.org/10.4028/www.scientific.net/amm.737.715.

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Water network construction makes water increased connectivity, for the water self-purification ability also has the corresponding improvement effect. With Xiaoqing River of Guangrao County segment as an example, paper built the simulation model of river water quality based on MIKE11, and simulated the connected water body self-purification capacity. Results show that water body connectivity can improve the water quality of Xiaoqing River to a certain extent.
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5

Li, Cheng, Ting Lin Huang, Wen Jie He, Chen Li e Zhi Wei Li. "Comparative Research for Different Treatment Technologies of Daily Drinking Water". Advanced Materials Research 663 (febbraio 2013): 863–69. http://dx.doi.org/10.4028/www.scientific.net/amr.663.863.

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The research takes Yang Liuqing water plant as an example.Compare the studies of the conventional process, coagulation pressure type membrane process, coagulation submerged membrane process between removal efficiency and water production rate.The result shows the removal efficiency of raw water turbidity and oxygen consumption had an increase of 7% and 4% than the conventional process. Disposable water production rate increased by 1%-2%.Meanwhile combined with other influence factors,a analytic hierarchy model has been established. From the two aspects of cost and benefit,compare comprehensively different process.The result shows that coagulation - immersed membrane process is more suitable drinking water treatment technology for water purification operation in water purification plant.
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6

Ji, Keyu, Chengkun Liu, Haijun He, Xue Mao, Liang Wei, Hao Wang, Mengdi Zhang, Yutong Shen, Runjun Sun e Fenglei Zhou. "Research Progress of Water Treatment Technology Based on Nanofiber Membranes". Polymers 15, n. 3 (31 gennaio 2023): 741. http://dx.doi.org/10.3390/polym15030741.

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In the field of water purification, membrane separation technology plays a significant role. Electrospinning has emerged as a primary method to produce nanofiber membranes due to its straightforward, low cost, functional diversity, and process controllability. It is possible to flexibly control the structural characteristics of electrospun nanofiber membranes as well as carry out various membrane material combinations to make full use of their various properties, including high porosity, high selectivity, and microporous permeability to obtain high-performance water treatment membranes. These water separation membranes can satisfy the fast and efficient purification requirements in different water purification applications due to their high filtration efficiency. The current research on water treatment membranes is still focused on creating high-permeability membranes with outstanding selectivity, remarkable antifouling performance, superior physical and chemical performance, and long-term stability. This paper reviewed the preparation methods and properties of electrospun nanofiber membranes for water treatment in various fields, including microfiltration, ultrafiltration, nanofiltration, reverse osmosis, forward osmosis, and other special applications. Lastly, various antifouling technologies and research progress of water treatment membranes were discussed, and the future development direction of electrospun nanofiber membranes for water treatment was also presented.
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Hayashi, N., H. Yokota, H. Furumai e M. Fujiwara. "Evaluation of source water quality for selection of drinking water purification system". Water Supply 8, n. 3 (1 settembre 2008): 271–78. http://dx.doi.org/10.2166/ws.2008.071.

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When renewing water purification facilities, it is important to select a suitable purification system that can accommodate the quality of the respective source water. The Japan Water Research Center has been collecting a large amount of water quality data from drinking-water utilities across Japan, categorising and analysing these data, and evaluating the suitability of water purification processes. Multivariate analyses such as hierarchical cluster analysis and principal component analysis were performed to investigate the relationships between the quality of source water used for water supply and various factors that affect the purification process. Based on these results, water sources throughout Japan were clearly categorised into four groups, and suitable water purification systems were identified for the different water quality groups. The results can serve as an important reference for water utilities during future facility renewal projects.
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Allen, Robert D., Yong-Hye Na, Ratnam Sooriyakumaran, Masaki Fujiwara e Kazuhiro Yamanaka. "Leveraging Resist Chemistry Research for Water Purification Membrane Technology". Journal of Photopolymer Science and Technology 23, n. 5 (2010): 741–47. http://dx.doi.org/10.2494/photopolymer.23.741.

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9

Chuikov, A. S., E. V. Sorokina, A. N. Volkov, U. V. Vedmetsky e D. V. Shabanov. "Technology of primary water purification". IOP Conference Series: Earth and Environmental Science 1010, n. 1 (1 aprile 2022): 012091. http://dx.doi.org/10.1088/1755-1315/1010/1/012091.

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Abstract The polluted wastewater treatment is one of the main issues in agro-industrial complex. This article is devoted to the primary water purification research for its further treatment with ferrate technology. The technology implies the wastewater treatment from household and industrial waste resulting from agricultural enterprises. The ferrate technology provides a high efficiency of pretreated water purification, in comparison with other existing methods. The article substantiates such an advantage accordingly. The waste generated as a result of wastewater treatment is non-toxic and disposal. The article proposes a new method of preliminary water purification based on its treatment between a galvanic couple in the presence of the calcium hydroxide. This method can be used at water treatment plants and at enterprises carrying out industrial activities in agriculture. The method is applicable only after mechanical filtration at the stage of primary water treatment. The proposed method provides water treatment from a wide range of various origins contaminants. The article also describes an experimental equipment specially designed for the proposed method’s implementation and further research. The equipment provides continuous water treatment consuming electricity, quicklime and compressed air. To maintain the lime particles in suspension condition the airflow is supplied through an aerator. The article applies the turbidimetric analysis method to conduct an in-depth analysis of the water treatment processes and determine the relative reagent concentration in the working area. The article also proves the absence of interface formation between water and milk of lime when subjected to air flow.
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Gou, Xiao Li, e Xuan Jun Wang. "The Combined Processing Technology Research of the Naturally Purification and Artificial Wetland to Dimethyl Hydrazine Waste Water". Advanced Materials Research 518-523 (maggio 2012): 2881–85. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.2881.

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In accordance with the shortcoming of naturally purification processing to liquid propellant dimethyl hydrazine waste water, the paper is putting forward the combined processing technology of naturally purification and artificial wetland. Designed process flow of the combined processing technology, and the naturally purification and artificial wetland dealing with the structure of pond, and to his processing dimethyl hydrazine the effect to imitate waste water has been in progress research. The result indicates: the technology can effective remove dimethyl hydrazine and his degradation product in the waste water, and the back waste water of processing achieves the placing in proper order quota.
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Più fonti

Tesi sul tema "Water purification research"

1

McGinley, Susan. "Borrowing from Mother Nature: Water Purification and Reuse in Tucson". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/622314.

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2

Heiner, George Benjamin. "Chlordane contamination in the Chattahoochee River : assessment of existing data and outline for future research". Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/20730.

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3

Yang, Linda, e Robert Liao. "Water Purification : Research on the Energy Supply of Air Gap Membrane Distillation for Access to Clean Water". Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-282905.

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Abstract (sommario):
Water stress is an ongoing problem in many places in the world, while the demand for clean and safe freshwater is growing due to the increasing population. In many developing countries, water supplies often are contaminated with arsenic, fluoride, etc. Therefore, it is important to realize that water scarcity and contamination issues concern only one sector but many. HVR Water Purification AB is developing a water purification prototype – ELIXIR 500 - using the air gap membrane technology and is implemented in Odisha, India, aiming to supply with 200 litre water daily. This thesis aims to estimate future energy sources to supply this prototype and explore the possibilities of using only renewable energy resources from technical, economic, and environmental perspectives. These are achieved by firstly identifying the energy possibilities in Odisha, India, and then calculating the feasibility of each solution chosen and finally analyzing the results. Among the energy sources, which are power grid, wind and solar power, diesel generator and solar-diesel hybrid system. It is found that the energy source to the prototype supplied by the power grid is 0.057 USD per litre water, which is the cheapest option. However, it is not feasible due to the lack of electrification from the local network. Meanwhile, the solar-diesel hybridized energy system is the most economical option if renewable energy sources are integrated with 0.11 USD per litre water.
Vattenstress ett pågående problem på många ställen i världen medan efterfrågan på rent och säkert dricksvatten växer på grund av den ökande befolkningen. I många utvecklingsländer är vattenförsörjningen ofta förorenade med arsenik, fluor osv. Det är därför viktigt att inse att vattenbrist och föroreningar inte bara rör en sektor utan många. HVR Water Purification AB utvecklade en prototyp för vattenrening - ELIXIR 500 - med hjälp av luftspaltmembrantekniken (eng: air gap membrane distillation och implementeras redan i Odisha, Indien, med målet att förse 200 liter rent vatten dagligt. Denna avhandling syftar till att uppskatta de framtida energikällorna för att tillhandahålla denna prototyp och utforska möjligheterna att endast använda förnybara energikällor ur tekniska, ekonomiska och miljömässiga perspektiv. Dessa uppnås genom att först identifiera de olika energimöjligheter i Odisha, Indien, följt av beräkningar om utförbarhet för varje vald lösning och slutligen en analys av resultaten. Bland energikällorna elnät, vind, sol, diesel generator och sol-diesel hybrid system har visat sig att energikällan till prototypen som levereras av elnätet som kostar 0.057 USD per liter vatten som det billigaste alternativet, men det är inte möjligt på grund av bristen på elektrifiering från det lokala elnätet. Å andra sidan är det hybridiserade energiskombinationen med solkrafts och diesel det billigaste alternativet om förnybara energikällor ska integreras, resultatet visade att vara 0.11 USD per liter vatten.
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Okalebo, Susan, University of Western Sydney, of Science Technology and Environment College e School of Engineering and Industrial Design. "Development and trial of a low-cost aerobic greywater treatment system". THESIS_CSTE_EID_Okalebo_S.xml, 2004. http://handle.uws.edu.au:8081/1959.7/814.

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This study was undertaken to examine the feasibilty of a low-cost aerobic system to treat greywater for reuse.Its purpose was to provide a system that would be easy to maintain, flexible and be affordable for households and small communities in developing countries. This thesis outlines and evaluates the key biological and chemical hazards associated with greywater reuse. It discusses the performance of a variety of wastewater treatment options in use. It presents details of the components of the greywater system,namely, an aerobic grease trap and slow sand filter. Reference is made to the evaporation and treatment bed and ultraviolet disinfection components, but these are not examined. The incorporation of vermitechnology in the preliminary stages of the system for reduction of organics in greywater is reviewed. This study takes the traditional approach to water quality assessment with the measurement of physical, chemical and biological indicators. Assessment of the system involved examining the input characteristics of the greywater, monitoring the vermiculture system and sampling the liquid discharge from the aerobic grease trap and slow sand filter for analysis of the quality indicators. The results obtained under the framework of this study have provided recommendations for further use of the aerobic grease trap and slow sand filter, while propsing an approach for an appropriate long-term monitoring program.
Master of Engineering (Hons)
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5

Shriner, Katherine Ann. "Strategies for reducing the mutagen content of chlorinated aqueous media". Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/50093.

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In anticipation of government mandates regulating the quantity of the toxic mutagen, 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone, which can be released into potable waters or from industrial facilities, technologies for monitoring the concentration, reducing the quantity, and inhibiting the formation of this compound were investigated. Adsorption of the chlorinated hydroxyfuranone from laboratory systems (pH 7.2, 22°) utilizing the non-polar, polymeric resin, Amberlite XAD-4, was successful. As these system conditions are comparable to those present in drinking water treatment facilities, application of this resin to such systems should be investigated. However, typical concentrations of the chlorinated mutagen released from such facilities are some 100 times less then those employed in laboratory experiments. As such, highly sensitive analytical technology, such as fluorescent spectroscopy, would be required for direct detection of the mutagen in these aqueous systems. Since development of a fluorescent adduct of the mutagen, through either Schiff's base or halogen replacement reactions, failed, application of the adsorption methodology was not investigated. Approaching the problem in a different manner lead to ° investigations aimed at reducing the formation of the mutagenic compound. Since the mutagen is formed upon chlorination of waters containing lignin derived materials, lignification in intact growing plants, and the effects of modified substrates on this process, were investigated. All modified substrates tested increased the uptake of a C¹⁴ labelled lignin precursor into the lignin containing fraction of a living poplar stem. Research continues in this area to determine through what mechanism these compounds are affecting lignification.
Master of Science
incomplete_metadata
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6

Ranmuthugala, Geethanjali Piyawadani. "Disinfection by-products in drinking water and genotoxic changes in urinary bladder epithelial cells". View thesis entry in Australian Digital Theses Program, 2001. http://thesis.anu.edu.au/public/adt-ANU20011207.110344/index.html.

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7

Okalebo, Susan. "Development and trial of a low-cost aerobic greywater treatment system". Thesis, View thesis, 2004. http://handle.uws.edu.au:8081/1959.7/814.

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Abstract (sommario):
This study was undertaken to examine the feasibilty of a low-cost aerobic system to treat greywater for reuse.Its purpose was to provide a system that would be easy to maintain, flexible and be affordable for households and small communities in developing countries. This thesis outlines and evaluates the key biological and chemical hazards associated with greywater reuse. It discusses the performance of a variety of wastewater treatment options in use. It presents details of the components of the greywater system,namely, an aerobic grease trap and slow sand filter. Reference is made to the evaporation and treatment bed and ultraviolet disinfection components, but these are not examined. The incorporation of vermitechnology in the preliminary stages of the system for reduction of organics in greywater is reviewed. This study takes the traditional approach to water quality assessment with the measurement of physical, chemical and biological indicators. Assessment of the system involved examining the input characteristics of the greywater, monitoring the vermiculture system and sampling the liquid discharge from the aerobic grease trap and slow sand filter for analysis of the quality indicators. The results obtained under the framework of this study have provided recommendations for further use of the aerobic grease trap and slow sand filter, while propsing an approach for an appropriate long-term monitoring program.
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8

Manipura, Walappuly Mudiyanselage Janakasiri Aruna Shantha Bandara. "Bioprocess development for removal of nitrogenous compounds from precious metal refinery wastewater". Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1007341.

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Removal of nitrogenous compounds from precious metal refinery (PMR) wastewater is important in terms of avoiding eutrophication (environmental protection), metal recovery (increased overall process efficiency and value recovery) and reuse of treated water (maximum use of natural resources). Extreme pH conditions (4 to 13 depending on the wastewater stream), high chemical oxygen demand (> 10,000 mg/I), numerous metals and high concentrations of those metals (> 20 mg/l of platinum group metals) in the wastewater are the main challenges for biological removal of nitrogenous compounds from PMR wastewater. Nitrogenous compounds such as NH₄⁺-N and N0₃-N are strong metal ligands, which make it difficult to recover metals from the wastewater. Therefore, a bioprocess was developed for removal of nitrogenous compounds from carefully simulated PMR wastewater. A preliminary investigation of metal wastewater was carried out to determine its composition and physico-chemical properties, the ability to nitrify and denitrify under different pH conditions and denitrification with different carbon Source compounds and amounts. Even at pH 4, nitrification could be carried out. A suitable hydraulic retention time was found to be 72 hours. There was no significant difference between sodium acetate and sodium lactate as carbon sources for denitrification. Based on these results, a reactor comparison study was carried out using simulated PMR wastewater in three types of reactors: continuously stirred tank reactor (CSTR), packed-bed reactor (PBR) and airlift suspension reactor (ALSR). These reactors were fed with 30 mg/l of Rh bound in an NH₄⁺ based compound (Claus salt: pentaaminechlororhodium (III) dichloride). Total nitrogen removal efficiencies of > 68 % , > 79 % and > 45 % were obtained in the CSTR, PBR and ALSR, respectively. Serially connected CSTR-PBR and PBR-CSTR reactor configurations were then studied to determine the best configuration for maximum removal of nitrogenous compounds from the wastewater. The PBR-CSTR configuration gave consistent biomass retention and automatic pH control in the CSTR. Ammonium removal efficiencies > 95 % were achieved in both reactors. As poor nitrate removal was observed a toxicity study was carried out using respirometry and the half saturation inhibition coefficients for Pt, Pd, Rh and Ru were found to be 15.81, 25.00, 33.34 and 39.25 mg/l, respectively. A mathematical model was developed to describe the nitrogen removal in PMR wastewater using activated sludge model number 1 (ASMl), two step nitrification and metal toxicity. An operational protocol was developed based on the literature review, experimental work and simulation results. The optimum reactor configuration under the set conditions (20 mg/I of Rh and < 100 mg/I of NH₄⁺-N) was found to be PBR-CSTR-PBR process, which achieved overall NH₄⁺-N and N0₃⁻-N removal efficiencies of > 90 % and 95 %, respectively. Finally, a rudimentary microbial characterisation was carried out on subsamples from the CSTR and PBRsecondary. It was found that the CSTR biomass consisted of both rods and cocci while PBRsecondary consisted of rods only. Based on these experimental works, further research needs and recommendations were made for optimisation of the developed bioprocess for removal of nitrogenous compounds from PMR wastewater.
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Shih, Po-Kang, e 石栢岡. "Research of Water Purification on Oyster Shell Contact Bed". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/33941993514686700197.

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博士
國立臺灣大學
生物環境系統工程學研究所
104
The purpose of this study is to utilize wasted oyster shells as the media of the contact bed to purify domestic wastewater on Erchong Floodway, Taipei County. There are three horizontal flow tanks in this system, horizontal flow and aerated oyster shell tank (HAOS), horizontal flow oyster shell tank (HOS), and horizontal flow gravel tank (HG), respectively. In the experiment site, use NaCl as the tracer to perform pulse tracer tests to discuss residence time distribution of the oyster shell constructed wetland and dispersion effects of solute transport by using longitudinal dispersion theory. Besides, I set an experimental tank beside the laboratory in the Department of Bioenvironmental System Engineering in NTU. The experimental tank was set to find the water purification efficiency and the dispersion effect in different water flow condition in the oyster shell. In the results of the horizontal flow and aerated oyster shell tank (HAOS), the average mass removal of BOD5, SS, NH4-N, NO3-N, PO4-P, and TP were 18.78, 58.95, 11.74, -1.19, 0.50, and 0.87 g/m2/day. The BOD5 first-order reaction reducing rate constant in 20°C was 2.20/day. Consequently, using oyster shells as the material of the subsurface flow, constructed wetland had better water purification efficiency than using gravels. In this system, part of the BOD5 was removed because of the removal of SS, and there was better blocking effect when using oyster shells as the materials than gravels. Aeration can effectively remove ammonia nitrogen, but the main purpose was to strengthen the nitrification in the water, so that ammonia nitrogen was converted into nitrate nitrogen. Oyster shells as the material still had better removal effect of nitrogen than gravels. The results reveal that hydraulic retention time will be underestimated by using nominal retention time. Mean hydraulic retention time is about 2.68~2.75 nominal retention time in 7.8 meter length wetland. This underestimation will cause errors of the efficiency of water purification. By tracer tests, the mean dispersion coefficient of oyster shell wetlands is 0.014~0.016 m2/min. The study also points out that the dispersion coefficient can be seen as a constant in such low velocity surroundings. The relationship between flow rate and HRT of the oyster shell tank can be found by using tracer test. The average HRT was 195.4 min (Q=2.0 LPM) ~125.6 min (Q=4.0 LPM). Using oyster shells as the material, when the distance was 2.0m, and the flow rate was 2.0~4.0 LPM, the dispersion coefficient and the dispersion number was about 0.002~0.008 m2/min and 0.09~0.27, respectively. Compare the normal plug flow model and the plug flow modified by dispersion. If we ignore the dispersion effect, the treatment efficiency will be overestimated. In this study, to consider the effects of dispersion. As average HRT was 125.6 min (Q=4.0 LPM), the treatment efficiency of plug flow modified by dispersion was 89.7% of the normal plug flow model without dispersion coefficient. In the beginning of the experiment, biofilm grew fast, about 36 days to reach the maximum. In the initial of the growth, the specific growth rate was 2.95/day, then the biomass reduced and oscillated. The average removal rate of BOD5 and NH4-N in the tank were 65.97% and 22.98%. They were related to the growth of biofilm and the maximum removal occurred in 36 days. The average removal rate of PO4-P in the tank was 17.74%. Phosphate was mainly adsorbed by oyster shell in the initial of the experiment.
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LIN, YU-CHENG, e 林昱成. "The Research on the Change of Design Thinking in Prototyping - A Conceptual Design of Water Purification Device". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3kszur.

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Abstract (sommario):
碩士
國立雲林科技大學
工業設計系
106
In the product design process, industrial designers usually visualize the creating concept through using Prototype. Prototyping is the initial process of product development, the important device to context, which plays an important role not only in the conceptual stage but also in the whole design process. Prototype makes designers understand the existing user experience and collection, exploring, evaluating ideas and expressing to the public, which is helpful for the purpose of learning, analyzing, modifying, testing and reviewing. Demonstrability of Prototype can display the professionalism, in fact under non-professional clients de point of view given, allow design team, users and client to have the same point of discussion, this will become some collaboration between different departments/ teams, this can help solve underlying problems, which will help the teams’ formation (“backbone”). When building the model, industrial designers can gain more in-depth design knowledge/ experience, can straight bring the designer into the real problem field. Generally, the design thinking process can be separated into three stages. The first stage is defining the problem, the second stage is ideas development, the final stage is testing and evaluating results. The defining problem can mainly through collecting to build foundational background and understand the needs of users. In this stage, involving in the prototype can explore the background effectively. The first-hand experience provides feedback to the designers directly, it can help to clarify the details of the problem. In the making prototype process of the idea development stage, looking into details can help generate design ideas effectively, the experience of the interaction with operating prototype and environment can inspire the industrial designers to figure out more possible action programs. The final stage, test functions, and express concept through the prior defined prototype. To conclude, the earlier to apply prototype into the design thinking process, the better will be for the creativity. Prototype produces different efforts and helps in the different stages. Therefore, this study strengthens the design thinking in the making prototype stage, discuss the influence on the design process, and discover and review by using case study and implementing action research in a prototype of water purification. To compare the difference from other design processes through applying practical verification in the making prototype process, inducing and analyzing the advantage. The study uses practical verification to record the change process to emphasize the importance of making prototype. Expecting the findings of this study can remind the industrial designers of the importance to make the prototype, also making prototype can improve the design quality and benefits of the developing project.
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Più fonti

Libri sul tema "Water purification research"

1

Federation, Water Environment. Water environment research: A research publication of the Water Environment Federation. Alexandria, VA: Water Environment Federation, 1992.

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B, Tennefy Albert, a cura di. Pesticide research trends. New York: Nova Science Publishers, 2008.

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Frey, Michelle M. Critical evaluation of Cryptosporidium research and research needs. Denver, CO: AWWA Research Foundation, 1998.

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4

United States. Environmental Protection Agency. Office of Research and Development. Drinking water treatment for small communities: A focus on EPA's research. Washington, DC: U.S. Environmental Protection Agency, Office of Research and Development, 1994.

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5

Fenton, Bruce A. The Canadian water resources equipment industry: Opportunities for research and manufacturing. [Ottawa]: Science Council of Canada, 1989.

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6

Symposium on Water Pollution Research (23rd 1988 Burlington, Ont.). Abstracts Twenty-Third Canadian Symposium on Water Pollution Research: Thursday, February 18, 1988, Canada Centre for Inland Waters, Burlington, Ontario. [Ottawa, Ont.]: Environment Canada, Conservation and Protection, Technology Development & Technical Services Branch, Environmental Protection, 1988.

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Federation, Water Pollution Control. Research journal of the Water Pollution Control Federation. Alexandria, Va: Water Pollution Control Federation, 1989.

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8

Jahn, Samia al Azharia. Proper use of African natural coagulants for rural water supplies: Research in the Sudan and a guide for new projects. Eschborn: Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) GmbH, 1986.

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9

Tallman, Daniel N. MgO filtration research. Pittsburgh, Pa: U.S. Dept. of the Interior, Bureau of Mines, 1987.

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Symposium on Water Pollution Research (26th 1991 Burlington, Ont.). Twenty-Sixth Canadian Symposium on Water Pollution Research: February 13-14, 1991, Canada Centre for Inland Waters, Burlington, Ontario : abstracts. [Ottawa, Ont.?: Environment Canada?, 1991.

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Capitoli di libri sul tema "Water purification research"

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Laha, A., D. Biswas e S. Basak. "Nanotechnology Explored for Water Purification". In Advanced Research in Nanosciences for Water Technology, 181–93. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02381-2_8.

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Vunain, Ephraim, e Reinout Meijboom. "Mesoporous Materials as Potential Absorbents for Water Purification". In Application of Nanotechnology in Water Research, 269–84. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118939314.ch10.

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Singh, Ashutosh, Akihil Ranjan, Nikhil, Manish Kumar Singh, Veda S. Nagaraja e S. Raghunandan. "IoT-Based Water Quality Analysis and Purification System". In Emerging Research in Computing, Information, Communication and Applications, 523–42. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1338-8_44.

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Rafique, Muhammad, Muhammad Bilal Tahir e Iqra Sadaf. "Nanotechnology: An Innovative Way for Wastewater Treatment and Purification". In Advanced Research in Nanosciences for Water Technology, 95–131. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02381-2_5.

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Attri, Pankaj, Bharti Arora, Rohit Bhatia, P. Venkatesu e Eun Ha Choi. "Plasma Technology: A New Remediation for Water Purification with or without Nanoparticles". In Application of Nanotechnology in Water Research, 63–77. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118939314.ch4.

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Mhlanga, Sabelo Dalton, e Edward Ndumiso Nxumalo. "Advances in Nanotechnologies for Point-of-Use and Point-of-Entry Water Purification". In Application of Nanotechnology in Water Research, 229–67. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118939314.ch9.

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Chen, K. "Water quality index of various Kuwaiti seas, and methods of purification". In Advances in Energy and Environment Research, 219–26. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315212876-43.

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Bebikhov, Yuriy, e Alexander Semenov. "Research on Purification of Natural Water to Drinking Quality by Electrocoagulation". In Lecture Notes in Networks and Systems, 1491–99. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-11051-1_153.

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Mlynarski, Amy L., e Jason J. Keleher. "Development of a Student-Centered Environmental Design Competition Focusing on Water Desalination and Purification". In Environmental Research Literacy: Classroom, Laboratory, and Beyond, 1–17. Washington, DC: American Chemical Society, 2020. http://dx.doi.org/10.1021/bk-2020-1351.ch001.

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Masuda, Yosuke, Takashi Oka, Erika Yoshinari, Takaaki Nishida e Tadashi Ikeda. "Analysis of the Description of the Multifunctionality of Farmland in the Administrative Plans of Local Municipalities". In Ecological Research Monographs, 487–501. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6791-6_29.

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AbstractFarmland has various beneficial functions, such as flood control, water purification, and habitat provision, in addition to food production. These functions are highly compatible with green infrastructure, and the use of farmland as green infrastructure has been discussed in recent years. In order to utilize these functions of farmland, it is preferable to include their usefulness and utilization measures in administrative plans and link them to actual projects. In this research, we collected eight types of administrative plans from local governments across Japan that could be related to the multifunctionality of farmland and reviewed the extent to which they contain descriptions of the multifunctionality of farmland as basic information for promoting the utilization of the multifunctionality of farmland. As a result, we discovered that farmland’s multifunctionality was incorporated into the plans of many municipalities. Municipalities with a certain population size and a high financial strength index, in particular, tended to mention the multifunctional role of farmland in their plans more frequently. In addition, we found that some of the functions were mentioned less frequently in the plans. While descriptions of “conservation of natural environment” and “landscape/culture formation and recreation” were common in many plans, descriptions of “disaster mitigation and response” and “water and food supply” in times of disaster were less common. Finally, we drew some recommendations that can be used as a reference for future planning and project promotion, including dissemination of knowledge and information of farmland’s multifunctionality to government and citizens.
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Atti di convegni sul tema "Water purification research"

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Abhishek, S., Amit Suresh Kumar, E. Anjana, M. Rahul e S. Jisma. "Water Purification Using Solar Thermal and Solar PV". In 2018 International Conference on Emerging Trends and Innovations In Engineering And Technological Research (ICETIETR). IEEE, 2018. http://dx.doi.org/10.1109/icetietr.2018.8529132.

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Xiao Jinyi, Xing Yi, Qiao Geng e Qi Feng. "Research on effects of photovoltaic powered water purification device on chemical features of water". In 2011 International Conference on Electric Technology and Civil Engineering (ICETCE). IEEE, 2011. http://dx.doi.org/10.1109/icetce.2011.5774453.

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Wang, Ying, e Xiazhen Shao. "Purification of water hyacinth in the urban river's simulation test research". In 2011 International Conference on Electrical and Control Engineering (ICECE). IEEE, 2011. http://dx.doi.org/10.1109/iceceng.2011.6058381.

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Liu, Lu ying, Yaqian Yao, Fuchun Lai, Jiadong Liu, Wenke Ge e Yanming Yao. "Suspended sediment simulation and water purification scheme research of turbid archipelago". In OCEANS 2016 - Shanghai. IEEE, 2016. http://dx.doi.org/10.1109/oceansap.2016.7485421.

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Rodríguez-Méndez, B. G., R. López-Callejas, R. Peña-Eguiluz, A. Mercado-Cabrera, R. Valencia-A., S. R. Barocio, O. G. Godoy-Cabrera, A. de la Piedad-Beneitez, J. S. Benítez-Read e J. O. Pacheco-Sotelo. "A Simulation of Pre-Arcing Plasma Discharge Processes in Water Purification". In PLASMA AND FUSION SCIENCE: 16th IAEA Technical Meeting on Research using Small Fusion Devices; XI Latin American Workshop on Plasma Physics. AIP, 2006. http://dx.doi.org/10.1063/1.2405946.

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Fang, Zhang, Chang-lai Xiao, Zhe Ma e Shuang Huang. "Experimental Research on Purification Capability of Different Media to the Water of Yitong River". In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517986.

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Rihong Liao, Yingjie Shen, Nan Zhan, Cao Liu e Yunfang Huang. "Research on the water purification for reclaimed water resource supply-type lakes by the method of recirculation filtration". In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965502.

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Zhang, Min, Fu-Yi Cui e Dong-Mei Liu. "The Research on Removing Cyclops of Zooplankton in Raw Water by Purification Process Combined with Pre-Oxidations". In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2009). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5163660.

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Sisri, Eliya Mei, e Hertien Koosbandiah Surtikanti. "Utilization of eco enzyme (EE) for polluted pond water purification: Development of mini research-based practical materials". In PROCEEDING OF INTERNATIONAL CONFERENCE ON FRONTIERS OF SCIENCE AND TECHNOLOGY 2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0105100.

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Boyle, Paul M., e Brent C. Houchens. "Hands-On Water Purification Experiments Using the Adaptive WaTER Laboratory for Undergraduate Education and K-12 Outreach". In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55108.

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A bench-top educational system, the Adaptive Water Treatment for Education and Research (WaTER) Laboratory, has been developed as part of a year-long capstone design project. The Adaptive WaTER Lab teaches students about the effectiveness of various water purification techniques. Stackable housings employ six different filtration and purification methods including: sediment filtration, carbon filtration, chemical disinfection, reverse osmosis, forward osmosis, and ultraviolet light disinfection. Filtration pressure is supplied by a hand or foot pump, and two rechargeable batteries are required for the UV sterilization unit. The advantages and limitations of each technique are investigated, with learning performance criteria measured by knowledge of: material costs, contaminant removal or neutralization capabilities (from large sediment to bacteria and viruses to chemicals), robustness and longevity, and power requirements and efficiencies. Finally, suitable combinations of treatment techniques are studied for specific contamination issues, with the ultimate goal of producing potable water. The importance of sustainable water use is also discussed. Background information and suggested experiments are introduced through accompanying educational packets. This system has had a successful impact on undergraduate education. The metrics of success include a published journal article, an awarded EPA P3 educational grant and a pending patent for the undergraduates involved in the development of the Lab. Other undergraduates are currently involved in a design for manufacturability study. Finally, the Lab has served as a demonstration tool in a new interdisciplinary engineering course “Integrated Approaches to Sustainable Development.” The Adaptive WaTER Lab has also been used in hands-on outreach to over 300 underrepresented K-12 students in the Houston area. Two high school students borrowed the original prototype of the Lab to use in an Earth Day demonstration, and one student recently worked on an individual project using the Lab. Because the Lab is portable and requires only human and solar power (to recharge the batteries via a solar backpack), it is also ideal for educational efforts in developing nations. Labs are currently being produced for outreach and donation via three international projects to install water purification systems and/or educational Labs in schools and clinics in Mexico, Lesotho and Swaziland, in collaboration with the Beyond Traditional Borders and Rice 360 health initiatives.
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Rapporti di organizzazioni sul tema "Water purification research"

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Husson, Scott M., Viatcheslav Freger e Moshe Herzberg. Antimicrobial and fouling-resistant membranes for treatment of agricultural and municipal wastewater. United States Department of Agriculture, gennaio 2013. http://dx.doi.org/10.32747/2013.7598151.bard.

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This research project introduced a novel membrane coating strategy to combat biofouling, which is a major problem for the membrane-based treatment of agricultural and municipal wastewaters. The novelty of the strategy is that the membrane coatings have the unique ability to switch reversibly between passive (antifouling) and active (antimicrobial) fouling control mechanisms. This dual-mode approach differs fundamentally from other coating strategies that rely solely on one mode of fouling control. The research project had two complementary objectives: (1) preparation, characterization, and testing of dual-mode polymer nanolayers on planar surfaces and (2) evaluation of these nanolayers as membrane modifiers. The first objective was designed to provide a fundamental understanding of how polymer nanolayer chemistry and structure affect bacterial deposition and to demonstrate the reversibility of chemical switching. The second objective, which focused on membrane development, characterization, and testing, was designed to demonstrate methods for the production of water treatment membranes that couple passive and active biofouling control mechanisms. Both objectives were attained through synergistic collaboration among the three research groups. Using planar silicon and glass surfaces, we demonstrated using infrared spectroscopy that this new polymer coating can switch reversibly between the anti-fouling, zwitterion mode and an anti-microbial, quaternary amine mode. We showed that switching could be done more than 50 times without loss of activity and that the kinetics for switching from a low fouling zwitterion surface to an antimicrobial quaternary amine surface is practical for use. While a low pH was required for switching in the original polymer, we illustrated that by slightly altering the chemistry, it is possible to adjust the pH at which the switching occurs. A method was developed for applying the new zwitterionic surface chemistry onto polyethersulfone (PES) ultrafiltration membranes. Bacteria deposition studies showed that the new chemistry performed better than other common anti-fouling chemistries. Biofilm studies showed that PESultrafiltration membranes coated with the new chemistry accumulated half the biomass volume as unmodified membranes. Biofilm studies also showed that PES membranes coated with the new chemistry in the anti-microbial mode attained higher biofilm mortality than PES membranes coated with a common, non-switchablezwitterionic polymer. Results from our research are expected to improve membrane performance for the purification of wastewaters prior to use in irrigation. Since reduction in flux due to biofouling is one of the largest costs associated with membrane processes in water treatment, using dual-mode nanolayer coatings that switch between passive and active control of biofouling and enable detachment of attached biofoulants would have significant economic and societal impacts. Specifically, this research program developed and tested advanced ultrafiltration membranes for the treatment of wastewaters. Such membranes could find use in membrane bioreactors treating municipal wastewater, a slightly upgraded version of what presently is used in Israel for irrigation. They also may find use for pretreatment of agricultural wastewaters, e.g., rendering facility wastewater, prior to reverse osmosis for desalination. The need to desalinate such impaired waters water for unlimited agricultural use is likely in the near future.
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Koven, William, Gordon Grau, Benny Ron e Tetsuya Hirano. Improving fry quality, survival and growth in commercially farmed fish by dietary stimulation of thyroid hormone production in premetamorphosing larvae. United States Department of Agriculture, 2004. http://dx.doi.org/10.32747/2004.7695856.bard.

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There is a direct correlation between successful metamorphosis from larvae to post-larvae and the quality of the resultant juveniles or fry. Juvenile quality, in turn, is a major factor influencing fish production level and market price. However, following the profound morphological and physiological changes occurring during metamorphosis, the emerging juveniles in some species characteristically demonstrate heterotrophic growth, poor pigmentation, cannibalism and generally poor survival. The white grouper (Epinephelus aeneus) in Israel and the Pacific threadfin (Polydactylussexfilis) in Hawaii are two promising candidates for mariculture that have high market value but a natural fishery that has sharply declined in recent years. Unfortunately, their potential for culture is severely hampered by variable metamorphic success limiting their production. The main objective was to compare the efficacy and economic viability of dietary or environmental iodine on metamorphic success and juvenile quality in the white grouper and the pink snapper which would lead to improved commercial rearing protocols and increased production of these species both in Israel and the US. The Hawaii Institute of Marine Biology encountered problems with the availability of pink snapper brood stock and larvae and changed to Pacific threadfin or moi which is rapidly becoming a premier aquaculture species in Hawaii and throughout the Indo-Pacific. The white grouper brood stock at the National Center for Mariculture was lost as a result of a viral outbreak following the sudden breakdown of the ozone purification system. In addition, the NCM suffered a devastating fire in the fall of 2007 that completely destroyed the hatchery and laboratory facilities although the BARD project samples were saved. Nevertheless, by studying alternate species a number of valuable findings and conclusions that can contribute to improved metamorphosis in commercially valuable marine species resulted from this collaborative effort. The Israeli group found that exposing white grouper larvae to external TH levels synchronized and increased the rate of metamorphosis. This suggested that sub-optimal synthesis of TH may be a major factor causing size heterogeneity in the larval population and high mortality through cannibalism by their larger more metamorphosed cohorts. Two protocols were developed to enrich the larvae with higher levels of the TH precursor, iodine; feeding iodine enriched Artemia or increasing the level of seawater iodine the larvae are exposed to. Results of accumulated iodine in gilthead seabream larvae indicated that the absorption of iodine from the water is markedly more efficient than feeding iodine enriched Artemia nauplii. Samples for TH, which will be analyzed shortly, will be able to determine if another dietary factor is lacking to effectively utilize surplus tissue iodine for TH synthesis. Moreover, these samples will also clarify which approach to enriching larvae with iodine, through the live food or exposure to iodine enriched seawater is the most efficient and cost effective. The American group found that moi larvae reared in ocean water, which possessed substantially higher iodine levels than those found in seawater well water, grew significantly larger, and showed increased survival compared with well water reared larvae. Larvae reared in ocean water also progressed more rapidly through developmental stages than those in low-iodine well seawater. In collaboration with Israeli counterparts, a highly specific and precise radioimmunoassay procedure for thyroid hormones and cortisol was developed. Taken altogether, the combined Hawaiian and Israeli collaborative research suggests that for teleost species of commercial value, adequate levels of environmental iodine are more determinate in metamorphosis than iodine levels in the live zooplankton food provided to the larvae. Insuring sufficiently high enough iodine in the ambient seawater offers a much more economical solution to improved metamorphosis than enriching the live food with costly liposomes incorporating iodine rich oils.
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