A Comparison Ot Two Activated Sludge Models For Application At The Rya Waste Water Treatment Plant In G Teborg Sweden
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A Comparison Ot Two Activated Sludge Models For Application At The Rya Waste Water Treatment Plant In G Teborg Sweden
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Author : Doug Welch
language : en
Publisher:
Release Date : 1994
A Comparison Ot Two Activated Sludge Models For Application At The Rya Waste Water Treatment Plant In G Teborg Sweden written by Doug Welch and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
A Comparison Of Two Activated Sludge Models For Application At The Rya Waste Water Treatmant Plant In G Teborg Sweden
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Author : D. Welch
language : en
Publisher:
Release Date : 1994
A Comparison Of Two Activated Sludge Models For Application At The Rya Waste Water Treatmant Plant In G Teborg Sweden written by D. Welch and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Sludge Treatment And Disposal
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Author : Environmental Research Information Center. Technology Transfer
language : en
Publisher:
Release Date : 1978
Sludge Treatment And Disposal written by Environmental Research Information Center. Technology Transfer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Sewage disposal categories.
"Supplemental information for presentation by Joseph B. Farrell at technology transfer design seminar 'Sludge Treatment and Disposal, ' March 30-31, 1978, Philadelphia, Pennsylvania." Cf. V. 1, p. iii
Use Of Enhanced Biological Phosphorus Removal For Treating Nutrient Deficient Wastewater
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Author : W. F. Harper Jr
language : en
Publisher: IWA Publishing
Release Date : 2004-01-01
Use Of Enhanced Biological Phosphorus Removal For Treating Nutrient Deficient Wastewater written by W. F. Harper Jr and has been published by IWA Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-01-01 with Science categories.
Anaerobic/aerobic (AnA) and completely aerobic (CA) laboratory-scale sequencing batch reactors operating on an acetate- and casamino acids-based synthetic wastewater were used to investigate the suitability of the AnA process for treating nutrient?deficient wastewaters in plants that have stringent effluent nutrient requirements. Of particular interest is the case where phosphorus (P)-deficient wastewaters with highly variable influent COD loading are being treated to meet both effluent TSS and P limits. At a 4 d mean cell residence time, AnA activated sludge had an approx. 20% lower P requirement than CA activated sludge. The difference between the end-of-aerobic cycle polyhydroxyalkanoate and carbohydrate contents of the sludges indicated that the AnAsludge used more influent carbon than the CA sludge for synthesis of non-P-containing storage products. The nitrogen requirements of AnA sludge were similar to those of the CA sludge. The AnA and CA SBRs were subjected to three different transient influent COD loading patterns that simulated (#1) daily COD Loading fluctuations, (#2) low weekend COD loading, and (#3) extended low COD loading periods. During the Loading Pattern #1 experiment, the average effluent soluble P concentrations for the AnA and CA SBRs were 0.4 and 1.0 mgP/L respectively, and complete removal of influent acetate was observed. During the Loading Pattern #2 experiment, the average effluent soluble P concentrations for the AnA and CA SBRs were 0.3 and 0.9 mgP/L respectively, but effluent acetate was detected during the first high COD loading cycle following the low weekend COD loading period. During the Loading Pattern #3 experiment, the VSS content of both reactors dropped sharply, effluent acetate breakthrough occurred, and effluent P concentrations exceeding 1 mgP/L were detected in both the AnA and CA SBRs. Based on these findings, the AnA process has potential as a technologically and economically superior alternative for wastewater treatment plants treating P-deficient wastewasters to meet stringent effluent TSS and P limits. This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
Activated Sludge
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Author : Paul Bishop
language : en
Publisher: CRC Press
Release Date : 1995-12-01
Activated Sludge written by Paul Bishop and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995-12-01 with Technology & Engineering categories.
Sludge Dewatering
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Author : Water Pollution Control Federation. Subcommittee on Sludge Dewatering
language : en
Publisher:
Release Date : 1969
Sludge Dewatering written by Water Pollution Control Federation. Subcommittee on Sludge Dewatering and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Sewage disposal categories.
Replacement Of Activated Sludge Secondary Clarifiers By Dynamic Straining
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Author : Michael Joyce
language : en
Publisher:
Release Date : 1975
Replacement Of Activated Sludge Secondary Clarifiers By Dynamic Straining written by Michael Joyce and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Sewage categories.
The Activated Sludge Method Of Sewage Treatment
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Author : Floyd William Mohlman
language : en
Publisher:
Release Date : 1916
The Activated Sludge Method Of Sewage Treatment written by Floyd William Mohlman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1916 with Sewage categories.
The Effects Of Temperature And Solids Retention Time On Activated Sludge Treatment Performance
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Author :
language : en
Publisher:
Release Date : 2003
The Effects Of Temperature And Solids Retention Time On Activated Sludge Treatment Performance written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
A bench-scale treatment system with external clarifier was used to determine the effects of solids retention time (SRT) and temperature on treatment performance while simulating the full scale activated sludge process. Four bench-scale reactors, operating at SRTs of 20, 10, 5 and 2 days, were fed settled municipal wastewater collected after primary clarification from the Kuwahee wastewater treatment plant in Knoxville, TN. Three operational temperatures were investigated during this study, 22°C, 12°C and 7°C. The order and duration of operation at each temperature was first 22°C for 61 days, next 7°C for 47 days and lastly 12°C for 105 days. Experimental results indicate that carbon treatment performance improved, on average with increasing SRT; however, carbon treatment performance was not effected by operational temperatures studied to the same extent. On average, carbon oxidation improved with increasing SRT at each operational temperature; however, carbon oxidation was more efficient at 12°C than 22°C. CODT treatment performance at 7°C was poor irrespective of SRT. The difference in performance between 22°C and 12°C was attributed to acclimation of biomass from startup at 22°C to operation at 12°C beginning at 108 days. Sludge volume index (SVI) and effluent suspended solids (ESS) values also indicated that SRT had a greater impact on biosolids settling than did temperature. During this study, nitrification was observed to be viable at 22°C and 12°C despite reported sensitivity of lower SRTs (2 and 5 days) to process changes and low operational temperature. According to these observations, higher SRTs would be recommended for full-scale treatment especially during wintertime or sub-optimum temperatures. Nitrification at 7°C was observed to be almost nonexistent for all SRTs studied during this research. Based on the data presented in this study, an SRT of 5 days and a process temperature of 12°C are necessary to achieve effective carbon treatment, biosolids settling, and nitrification. A comparison of the full and bench scale (5-day SRT) systems, based on the operational and environmental parameters considered in this study revealed inadequacies of the bench scale system in simulating the full scale facility. Carbon treatment performance as well as MLSS levels, differed in the two systems. The full scale facility consistently discharged significantly lower carbon levels than did the bench scale system. Additionally MLSS levels were significantly higher in the full scale facility. Nitrification performance was better in the bench scale system at temperatures above 12°C but were significantly poorer at 7°C.
Evaluation Of Processes To Reduce Activated Sludge Solids Generation And Disposal
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Author : Julian Sandino
language : en
Publisher: Iwa Pub
Release Date : 2010
Evaluation Of Processes To Reduce Activated Sludge Solids Generation And Disposal written by Julian Sandino and has been published by Iwa Pub this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Science categories.
This project will deal with a number of aspects of WAS-only-reduction technologies for both industrial and municipal wastewater treatment applications. The objectives of this project include the following: 1. Developing an evaluation methodology that can be used to independently assess the effectiveness of WAS-reduction technologies 2. Demonstrating the previously listed methodology with at least one WAS-reduction technology This study includes not only the primary goals of establishing the degree of WAS reduction and corresponding capital and operation and maintenance (O&M) costs, but also such details as impacts on dewaterability (e.g., changes in polymer requirements, and maximum solids content achievable), changes in volatile solids reduction and corresponding biogas production in anaerobic digestion, possible odor issues in terms of in-plant processing requirements or ultimate product quality for disposal that result from these processes, and the change in characteristics of the recycle streams back to the main process (such as increased nutrient return, increased total suspended solids [TSS] return, phosphorus removal, etc.). In addition to the more technical parameters, the adopted approach also considers evaluations of operability, reliability, and maintainability on each of the leading processes. Some of these effects were determined by laboratory testing and plant data evaluation. Others were investigated through comprehensive modeling using standard industry models such as ASM 2d for liquid-stream biological treatment and the ADM1 model for anaerobic digestion. A key objective of this work is an impartial validation of these technologies and the development of a methodology for assessment of additional technologies that currently do not exist, but could be developed in the future. This requires not only real world operating data, but also a degree of understanding of the fundamental mechanism behind the process. As such, a critical part of this project involves the discussion of the potential underlying mechanisms for each of the validated technologies.