Download or read book Direct Identification and Enumeration of Sulfate Reducing Bacterial Populations in Constructed Wetlands Treating Coal Acid Mine Drainage written by Margaret M. Williams and published by . This book was released on 1996 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulfate Reduction in Five Constructed Wetlands Receiving Acid Mine Drainage written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Constructed wetlands have been shown to be effective in treating various types of wastewater. One type, Acid Mine Drainage (AMD), is characterized by high acidity, heavy metals, and sulfate. Five Constructed Wetlands, Friar Tuck, Tecumseh, and Midwestern in southwestern Indiana, and Simco and Wills Creek wetland in Ohio, were studied to determine their treatment efficiencies for sulfate and metal removal. Sulfate Reduction by microorganisms in constructed wetlands can remove sulfate and dissolved metals, and can generate alkalinity. Approximately 100 water samples and 50 soil samples were taken during the winter and summer seasons at the five wetlands and analyzed for sulfate and metal concentrations, sulfur isotope values, pH, Eh, and conductivity. Resulting data indicates that sulfate reduction is occurring at all five wetlands, but varies in degrees of treatment effectiveness. The Friar Tuck wetland shows minimal evidence of sulfate reduction, with dilution being the main remediation mechanism. A small volume of AMD is being overwhelmed by numerous freshwater inputs resulting in a significant improvement in water chemistry due to this dilution. The Tecumseh wetland shows little change in influent/effluent sulfate and sulfide values suggesting that treatment of the influent wastewater by sulfate reduction was ineffective for both sampling seasons. The Midwestern wetland for the summer season shows a significant increase in water sample d 34 S, from -5.03 permil to +0.27 permil with a corresponding drop in sulfate concentrations from 1740 ppm to 831 ppm, demonstrating successful sulfate reduction and wastewater treatment. However, the winter season sampling showed no change in d 34 S, indicating only minor sulfate reduction, but sulfate concentrations still fell from 1740 ppm to 831 ppm, indicating an additional sulfate removal process. The Wills Creek wetland shows little change in influent/effluent sulfate concentrations and sulfur isotope values suggesting that sulfate reduction is inactive for both sampling seasons. The Simco wetland was flooded due to beaver constructed damns during our winter sampling and accurate data were not obtained. Summer water sample data show a significant increase in d 34 S, from -3.58 at the influent to +6.26 at the effluent and a corresponding decrease in sulfate concentrations from 640 ppm to 290 ppm, demonstrating successful sulfate reduction trends.
Download or read book The Role of Dissimilatory Sulfate Reduction in Wetlands Constructed for Acid Coal Mine Drainage amd Treatment written by Frank J. Taddeo and published by . This book was released on 1991 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbiological Treatment of Acid Mine Drainage Waters written by Louis B. Whitesell and published by . This book was released on 1971 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the study was to determine if the abilities of certain bacteria to oxidize ferrous iron or to convert sulfate to hydrogen sulfide could be applied to the neutralization and subsequent removal of iron from difficult-to-treat mine drainage waters. If one or both of these concepts could be successfully utilized, the expense of adequately treating these types of problem waters might be significantly reduced. Laboratory studies demonstrated that both pure cultures and fresh field cultures of acidophilic iron bacteria could readily oxidize ferrous iron in both synthetic and natural acid mine drainage waters. Approximate requirements of oxygen, carbon dioxide, nitrogen and phosphorus by the iron bacteria were established. Limestone neutralizations of partially oxidized acid mine waters were conducted. Although sulfate-reducing bacteria were isolated, attempts to grow the cultures or produce hydrogen sulfide at pH values below 5.5 were unsuccessful.
Download or read book Studies on Sulfate Reducing Bacteria SRB for Treatment of Acid Mine Drainage written by Wei Yang and published by . This book was released on 1998 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbial Ecology of Sulfate reducing Bacteria in an Acid Mine Drainage impacted Watershed and Bioremediation Treatment System written by Nathan T. Smith and published by . This book was released on 2005 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Sulfate Reduction Under Low Metal and Anaerobic Conditions by Sulfate reducing Bacteria in a Treatment Wetland System Treating a High Sulfate Concentrated Creek in an Urban Environment written by Keith White and published by . This book was released on 2012 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an increase in urbanization, many ephemeral water ways are becoming perennial as a result of excess water runoff from impervious surfaces. The Cities of Reno and Sparks in Nevada have monitored watersheds draining to the Truckee River, a river with established total maximum daily loads (TMDLs), and identified one such water way (Chalk Creek) as a source of elevated total dissolved solids (TDS), total nitrogen, and total phosphorous to the Truckee River. The Nevada Division of Environmental Protection's (NDEP) 2006 303d list of impaired water bodies has listed Chalk Creek for sulfate, orthophosphate, TDS, and selenium. Chalk Creek by itself is not a major contributor of TDS to the Truckee River, but control of TDS in the creek and elsewhere would have positive implications throughout the watershed. A watershed characterization study by JBR Environmental Consulting, Inc. determined that sulfate was the major component of the TDS in Chalk Creek. A treatment wetland was constructed to reduce the levels of sulfate in the water and thereby reduce the levels of TDS. Sulfate levels and other water quality parameters were analyzed over a 49 week period. The purpose of this study was to analyze the reduction of sulfate in the wetland. At the time of this study, most literature involved sulfate reduction and subsequent sulfide removal by metal chelation in mining operations. Since the project area is low in metals, sulfide precipitation was not expected. The results of this study showed no significant change in sulfate levels or TDS levels over the study period.
Download or read book Successive Alkalinity producing Systems SAPS for the Treatment of Acidic Mine Drainage written by Douglas A. Kepler and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constructed wetland treatment system effectiveness has been limited by the alkalinity-producing, or acidity-neutralizing, capabilities of the systems. Anoxic limestone drains (ALD's) have allowed for the treatment of approximately 300 mg/L net acidic mine drainage, but current design guidance precludes using successive ALD's to generate alkalinity in excess of 300 mg/L because of concerns with dissolved oxygen. "Compost" wetlands designed to promote bacterially mediated sulfate reduction are suggested as a means of generating alkalinity required in excess of that produced by ALD's. Compost wetlands create two basic needs of sulfate reducing bacteria; anoxic conditions resulting from the inherent oxygen demand of the organic substrate and quasi-circumneutral pH values resulting from the dissolution of the carbonate fraction of the compost. However, sulfate reduction treatment area needs are generally in excess of area availability and/or cost effectiveness. Second generation alkalinity-producing systems demonstrate that a combination of existing treatment mechanisms has the potential to overcome current design concerns and effectively treat acidic waters ad infinitum. Successive alkalinity-producing systems (SAPS) combine ALD technology with sulfate reduction mechanisms. SAPS promote vertical flow through rich organic wetland substrates into limestone beds beneath the organic compost, discharging the pore waters. SAPS allow for conservative wetland treatment sizing calculations to be made as a rate function based on pH and alkalinity values and associated contaminant loadings. SAPS potentially decrease treatment area requirements and have the further potential to general alkalinity in excess of acidity regardless of acidity concentrations.
Download or read book Role of Sulfate reducing Bacteria in the Attenuation of Acid Mine Drainage Through Sulfate and Iron Reduction written by Caryl Ann Becerra and published by . This book was released on 2010 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulfur Mineralization in a Wetland Constructed to Treat Acid Mine Drainage written by Leslie S. Laudon and published by . This book was released on 1988 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Rational Approach in Sizing Constructed Wetlands to Treat Acid Mine Drainage written by Barbara Jean Hawkins-Bowman and published by . This book was released on 1995 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Sulfate reducing Bacteria in Sulfide Mineral Diagenesis written by William G. Stanley and published by . This book was released on 2001 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biogeochemical Processes Occurring Within Constructed Wetlands for Treatment of Acid Mine Drainage written by Melinda N. Wallace and published by . This book was released on 1996 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Use of Sulfate reducing Bacteria for In situ Bioremediation in Treatment of Acid Mine Drainage written by James C. Patula and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Appraisal of Neutralization Processes to Treat Coal Mine Drainage written by Harold L. Lovell and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbiological Treatment of Acid Mine Drainage Waters written by Continental Oil Company. Research and Development Department and published by . This book was released on 1971 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Treatment Wetlands written by Robert H. Kadlec and published by CRC Press. This book was released on 2008-07-22 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely revised and updated, Treatment Wetlands, Second Edition is still the most comprehensive resource available for the planning, design, and operation of wetland treatment systems. The book addresses the design, construction, and operation of wetlands for water pollution control. It presents the best current procedures for sizing these syste
