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The Effect Of Sand Size In The Efficiency Of Intermittent Sand Filters
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Book Synopsis The Effect of Sand Size in the Efficiency of Intermittent Sand Filters by : Robert Feaster Coleman
Download or read book The Effect of Sand Size in the Efficiency of Intermittent Sand Filters written by Robert Feaster Coleman and published by . This book was released on 1942 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Intermittent Sand Filters by : Mohd. Asri Md. Nor
Download or read book Performance of Intermittent Sand Filters written by Mohd. Asri Md. Nor and published by . This book was released on 1991 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology Assessment of Intermittent Sand Filters by : Damann L. Anderson
Download or read book Technology Assessment of Intermittent Sand Filters written by Damann L. Anderson and published by . This book was released on 1985 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effectiveness of Varying Effective Size Filter Sand and Hydraulic Loading Rates on Intermittent Sand Filters by : Basil Tupyi
Download or read book Effectiveness of Varying Effective Size Filter Sand and Hydraulic Loading Rates on Intermittent Sand Filters written by Basil Tupyi and published by . This book was released on 1977 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling the Performance of the Intermittent Sand Filter by : Peter A. Cowan
Download or read book Modeling the Performance of the Intermittent Sand Filter written by Peter A. Cowan and published by . This book was released on 1979 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design, Set-up, and Operation of a Pilot Scale Intermittent Sand Filter -septic Tank System to Evaluate the Effects of Sand Depth and Infiltration Rate on Filter Treatment Efficiency by : James Albert Peeples
Download or read book Design, Set-up, and Operation of a Pilot Scale Intermittent Sand Filter -septic Tank System to Evaluate the Effects of Sand Depth and Infiltration Rate on Filter Treatment Efficiency written by James Albert Peeples and published by . This book was released on 1991 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EPA-600/2 written by and published by . This book was released on 1979 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effective Grain Size and Uniformity Coefficient's Role in Performance of Intermittent Sand Filters by : Thomas M. Allen
Download or read book Effective Grain Size and Uniformity Coefficient's Role in Performance of Intermittent Sand Filters written by Thomas M. Allen and published by . This book was released on 1971 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intermittent Sand Filtration to Upgrade Existing Wastewater Treatment Facilities by : Gary R. Marshall
Download or read book Intermittent Sand Filtration to Upgrade Existing Wastewater Treatment Facilities written by Gary R. Marshall and published by . This book was released on 1974 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intermittent Slow Sand Filters by : Magdalena Pachocka
Download or read book Intermittent Slow Sand Filters written by Magdalena Pachocka and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: As many as 500,000 people in developing countries rely on an intermittent slow sand filter, called the BioSand filter to provide safe drinking water. However, it has been shown that BioSand filters do not remove all of the pathogens. The mechanisms of water purification in slow sand filtration have not been clearly understood until this day. In order to successfully influence intermittent slow sand filters performance we need to have a full understanding of removal processes that govern their efficiency. In the first part of this study pathogen removal mechanisms in intermittent slow sand filtration were investigated. In the second part of this study the effect on pathogen removal of a zero-valent iron-sand mixed layer, placed at the bottom of an intermittent slow sand filter was investigated. A series of experiments was performed on sand columns ripened with creek water. It was shown that the majority of E.coli was removed during filtration through the schmutzdecke, while the residence time in the biologically active layer did not have a significant effect on its removal. Quite to the contrary, the majority of MS-2 virus was removed with the residence time in the biologically active layer while the filtration through the schmutzdecke did not have significant affect on its removal. Clearly, two different mechanisms govern bacteria and virus removal in intermittent slow sand filtration. The EDX analysis of the schmutzdecke material revealed that it was primarily composed of O, C, Si, Al, Fe, Ca, and Mn. The zeta potential analysis showed that the schmutzdecke was neutral in charge and was composed of positively, neutrally and negatively charged particles. It was determined that a flocculation process was not a likely mechanism of either E.coli or MS-2 removal in intermittent slow sand filtration. The disturbance of the schmutzdecke had a significant impact on E.coli removal but only a slight effect on MS-2 removal. The intricate internal structure of the schmutzdecke might affect bacteria removal by an increase in rate of collisions. The disturbance of the schmutzdecke may cause the water to bypass the treatment in the schmutzdecke "network" of polymeric strands. It was concluded that an additional treatment step is needed in order to efficiently remove viruses; that the residence time in the schmutzdecke affects the quality of the effluent.; that the disturbance of the schmutzdecke might lead to a significant compromise in water quality and thus should be avoided; and that the addition of Al or Fe into the filter influent might benefit the pathogen removal efficiency. In the second part of the study an intermittent slow sand filter was amended with a zero-valent iron-sand mixture at the bottom of the column in order to improve its performance, especially virus removal. In the first challenge experiment the ZVI amended filter removed 100% of both E.coli and MS-2. Although, in the second challenge experiment the zero-valent iron-sand layer caused a decrease in E.coli/MS-2 concentration for unknown reasons, both E.coli and MS-2, exhibited breakthrough in the effluent. The ZVI powder can be obtained by sieving iron filings which are a waste byproduct of iron industry. Therefore, it is readily available to communities in developing countries. It was shown that use of ZVI in an intermittent slow sand filter can greatly improve its safety. However, the mechanisms responsible for this benefit and limitations of ZVI are not yet explained and deserve to be investigated.
Book Synopsis Performance and Upgrading of Wastewater Stabilization Ponds by : E. Joe Middlebrooks
Download or read book Performance and Upgrading of Wastewater Stabilization Ponds written by E. Joe Middlebrooks and published by . This book was released on 1978 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Separation of Algal Cells from Wastewater Lagoon Effluents by : U.S. Environmental Protection Agency
Download or read book Separation of Algal Cells from Wastewater Lagoon Effluents written by U.S. Environmental Protection Agency and published by BiblioGov. This book was released on 2013-11 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics to use to solve these issues. This collection of publications ranges from historic documents to reports released in the new millennium, and features works like: Bicycle for a Better Environment, Health Effects of Increasing Sulfur Oxides Emissions Draft, and Women and Environmental Health.
Book Synopsis A Regression Model to Predict the Performance of the Intermittent Sand Filter by : Peter A. Cowan
Download or read book A Regression Model to Predict the Performance of the Intermittent Sand Filter written by Peter A. Cowan and published by . This book was released on 1979 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Pilot-scale Intermittent Sand Filters Loaded with Oxidation Pond Effluent by : Gary Leroy Huffman
Download or read book Performance of Pilot-scale Intermittent Sand Filters Loaded with Oxidation Pond Effluent written by Gary Leroy Huffman and published by . This book was released on 1979 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intermittent Sand Filter Systems by : Washington (State). Office of Shellfish and Water Protection
Download or read book Intermittent Sand Filter Systems written by Washington (State). Office of Shellfish and Water Protection and published by . This book was released on 2007 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Sand Size on Biofilm Volume and Surface Area in Fluidized Sand Filters Using Three Dimensional Image Analysis by : Teresa Kieun Nam
Download or read book Effects of Sand Size on Biofilm Volume and Surface Area in Fluidized Sand Filters Using Three Dimensional Image Analysis written by Teresa Kieun Nam and published by . This book was released on 1998 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Progress in Slow Sand and Alternative Biofiltration Processes by : Rolf Gimbel
Download or read book Recent Progress in Slow Sand and Alternative Biofiltration Processes written by Rolf Gimbel and published by IWA Publishing. This book was released on 2006-03-31 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Slow sand filtration is typically cited as being the first "engineered" process in drinking-water treatment. Proven modifications to the conventional slow sand filtration process, the awareness of induced biological activity in riverbank filtration systems, and the growth of oxidant-induced biological removals in more rapid-rate filters (e.g. biological activated carbon) demonstrate the renaissance of biofiltration as a treatment process that remains viable for both small, rural communities and major cities. Biofiltration is expected to become even more common in the future as efforts intensify to decrease the presence of disease-causing microorganisms and disinfection by-products in drinking water, to minimize microbial regrowth potential in distribution systems, and where operator skill levels are emphasized. Recent Progress in Slow Sand and Alternative Biofiltration Processes provides a state-of-the-art assessment on a variety of biofiltration systems from studies conducted around the world. The authors collectively represent a perspective from 23 countries and include academics, biofiltration system users, designers, and manufacturers. It provides an up-to-date perspective on the physical, chemical, biological, and operational factors affecting the performance of slow sand filtration (SSF), riverbank filtration (RBF), soil-aquifer treatment (SAT), and biological activated carbon (BAC) processes. The main themes are: comparable overviews of biofiltration systems; slow sand filtration process behavior, treatment performance and process developments; and alternative biofiltration process behaviors, treatment performances, and process developments.