Download or read book Optimization of Enhanced Biological Phosphorus Removal in Sequencing Batch Reactors at the Dauphin Borough Wastewater Treatment Plant written by James A. Frazier and published by . This book was released on 1993 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Enhanced Biological Phosphorus Removal in Sequencing Batch Reactor Systems written by Shuh-Ren Jing and published by . This book was released on 1988 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Phosphorus Removal Activated Sludge Process in Warm Climates written by Cao Ye Shi and published by IWA Publishing. This book was released on 2011-03-15 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Special Offer: Cao Ye Shi Author Set - Buy all three books together and save a total £76! Biological Phosphorus Removal Activated Sludge Process in Warm Climates presents the results of detailed research on the Enhanced Biological Phosphorus Removal (EBPR) activated sludge process under warm climate conditions (20oC - 30oC), which is part of the R & D program of Public Utilities Board (PUB) Singapore. The investigations and studies presented in this book are application-oriented, but at the same time the studies aim at an insightful understanding of the EBPR with the knowledge of the latest development in academic field. The focus points are: EBPR performance of laboratory-scale and full-scale activated sludge processes under the site conditions in warm climates The carbon competition and distribution between PAO and GAO (and denitrifiers) in the process The stoichiometry and kinetics of P-release, COD uptake in the anaerobic environment and P-uptake in the aerobic environment under different temperatures and operating conditions PAO and GAO population fractions, shift and dominance studies using FISH and batch tests The inter-relationships between the system performance, process design and the microbial community EBPR for industrial wastewater (high ratio of feed COD/P) treatment under warm climates. Together with the preceding book – Biological Nitrogen Removal Activated Sludge Process in Warm Climates – published by IWA in 2008, this book fills the gap of biological nutrient (nitrogen and phosphorus) removal in warm climates and provides unique experiences and knowledge for Process and design researchers and engineers in wastewater research, students and academic staff in Civil/Sanitation/Environment Departments, as well as Managers, Engineers and Consultants in water companies and water utilities. Visit the IWA WaterWiki to read and share material related to this title: http://www.iwawaterwiki.org/xwiki/bin/view/Articles/SELECTIONOFDOMESTICWASTEWATERTREATMENTSYSTEMSINWARMCLIMATEREGIONS

Download or read book Implementing Enhanced Biological Phosphorous Removal in High Strength Wastewater written by Chang Hoon Ahn and published by . This book was released on 2004 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Enhanced Biological Phosphorus Removal at High Temperature Using Different Carbon Sources Key Microorganisms and Processes written by Rogelio Ernesto Zuniga Montanez and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Municipal wastewater contains a number of constituents that can have detrimental effects if discharged to receiving water bodies. Phosphorus (P) is of specific interest as a limiting nutrient in aquatic ecosystems that can cause eutrophication. In enhanced biological phosphorus removal (EBPR), polyphosphate accumulating organisms (PAOs) store excess P intracellularly. To achieve this accumulation, the organisms are exposed consecutively to anaerobic and either aerobic or anoxic conditions. During the anaerobic phase, PAOs consume and store organic carbon with P release, followed by the aerobic/anoxic phase during which the stored carbon is oxidized and P is taken up and stored as polyphosphate. PAOs are not the only bacteria that can thrive under these cyclic conditions and they face competition from glycogen accumulating organisms (GAOs). The latter have a similar metabolism but do not accumulate P. Most research to date has focused on the use of certain volatile fatty acids (VFAs) as carbon sources and on process conditions at temperatures common in temperate climates. Much remains unknown about the potential of EBPR in tropical regions and the suitability of other carbon substrates to drive the accumulation of phosphate. The purpose of this dissertation is to contribute to the understanding of EBPR at high temperatures and with unconventional carbon sources. Three different studies were designed and conducted with the following aims: (a) to evaluate the long-term EBPR stability and key microbial community in a wastewater treatment plant (WWTP) designed to achieve P removal in Singapore, (b) to study the process efficiency, biochemical transformations and organisms involved in a laboratory-scale EBPR reactor fed by alternating the substrates acetate and glutamate, and (c) to assess the potential of using unconventional carbon sources for EBPR by testing glutamate and glucose as alternating substrates at the laboratory-scale. The research included experiments at the full- and laboratory-scale, all at a mean temperature of 30 °C. Sustained observations in all three studies served to uncover the biochemical and microbial community dynamics. In the full-scale study, I conducted a yearlong evaluation of the EBPR activity at a WWTP that had been retrofitted to facilitate EBPR in Singapore. A mean P removal efficiency of 90 % was observed throughout the sampling period, similar to temperate climate installations and contrary to earlier reports that EBPR was not feasible at high temperatures. The main PAOs present in the reactor were Tetrasphaera, Candidatus Accumulibacter (Accumulibacter) and Dechloromonas, with mean relative abundances of 1.53, 0.43 and 0.69 %, respectively. The PAO community underwent changes during the surveyed period, with a marked transition from a Tetrasphaera-dominated community to a more even one. The link between PAOs and the P released in the anaerobic compartment was supported by a statistically significant correlation between the relative abundance of these organisms and the measured P concentrations. GAOs and PAOs coexisted without compromising the EBPR activity. In one of the laboratory-scale studies, glutamate and acetate were alternated as the carbon source for a reactor operated at 30 °C. Complete and stable P removal was achieved with a predominantly glutamate-containing feed, after modifying operating parameters commonly used in VFA-fed systems to a COD/P ratio of 40:1 mg COD/mg P and a cycle duration of 8 h. Long-term EBPR with a feed dominated by glutamate in a laboratory-scale reactor has not been previously reported. The P and carbon cycling patterns were different for glutamate and acetate. Reduced P release and polyhydroxyalkanoate (PHA) accumulation happened when glutamate was fed, but not with acetate, where glutamate appeared to be stored as an unidentified non-PHA compound or as different compounds. The PAO Accumulibacter and the GAO Candidatus Competibacter (Competibacter) remained the only known EBPR bacteria during the period of good EBPR performance, at similar relative abundances. A canonical correlation analysis revealed that the relative abundance of some non-PAO organisms correlated more strongly with variables that denoted good EBPR activity than did the abundance of any of the known PAOs. In the last study, a laboratory-scale sequencing batch reactor was used to test the EBPR potential of glutamate and glucose as alternating carbon sources in a high temperature process. The recommended influent COD/P ratio and batch duration for VFA-fed systems were unsuccessful. After modifications, COD/P ratios of 20:1 and 40:1 mg COD/ mg P resulted in complete P removal, but only in the short term. The EBPR stoichiometry with these two carbon substrates differed from that of VFA-fed systems. For both, lower P and PHA cycling was observed, and intracellular carbon storage compounds that were not PHA appeared to contribute to P cycling, as shown from carbon balances. A very diverse EBPR community was present in the reactor, including Accumulibacter, Tetrasphaera and Dechloromonas PAOs, and Competibacter, Defluviicoccus, Micropruina and Kineosphaera GAOs. Most of these organisms have not been reported before in laboratory-scale EBPR reactors operated at high temperatures. The work presented in this dissertation expands the understanding of EBPR by showing that the process is possible and stable in full-scale treatment plants at high temperature, with removal efficiencies similar to those observed in temperate climates. In addition, it was shown that unconventional carbon sources, specifically, glutamate and glucose, do participate in EBPR and that complete and stable phosphorus removal can be achieved with glutamate as dominant substrate at high temperature. A core PAO and GAO community was present in the three systems, where the interactions among members were more complex than previously considered, including competition, coexistence and succession events. The results obtained from this work enhance our fundamental knowledge of EBPR as an industrial process, as well as the metabolic diversity, niches and dynamics of PAOs and GAOs. The study outcomes can inform design and operational strategies at full-scale treatment plants. Lastly, the consideration of both high temperatures and unconventional carbon sources for EBPR is expected to aid in the development of more efficient treatment processes.

Download or read book Simultaneous Enhanced Biological Phosphorus Removal and Polyhydroxyalkanoates Recovery written by Rafael Perez-Feito and published by . This book was released on 2001 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies on Biological Phosphorus Removal in a Sequencing Batch Reactor written by Edwin F. Barth and published by . This book was released on 1981 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Study and Mathematical Modeling of Enhanced Biological Phosphorus Removal Based on Aeration Effects written by Parnian Izadi and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced Biological Phosphorus Removal (EBPR), as a promising technology, has been implemented in many wastewater treatment plants (WWTP) worldwide, with high efficiency in phosphorus removal performance. In a well-operated EBPR, lower operational cost, reduced sludge production, and lower environmental impacts are achievable. Yet, with the proven capability of EBPR in efficient phosphorus removal, disturbance and periods of unexplained insufficient phosphorus removal have been detected in real WWTP in different cases due to loss of PAO biomass under presumed favorable conditions for EBPR. These complications may lead to process upset, system failure, and violation of discharge regulations. Disruption in process performance may originate from several external factors such as heavy rainfall, excessive nitrate loading to the anaerobic reactor, excessive aeration of activated sludge, or it may be a result of PAOs competition with other groups of microorganisms such as glycogen accumulating organisms (GAO). Therefore, the key in reaching low P-effluent levels is to optimize the operation and minimize the effect of inefficient factors. This Ph.D. study has focused on aeration as a crucial operational factor in the EBPR process in sequential batch reactor (SBR) systems. EBPR aerobic P-uptake, anaerobic P-release, and carbon storage of phosphorus accumulating organisms (PAOs) are closely related to oxygen mass transfer. The study is oriented to different aspects of aeration, addressing aeration concentration (dissolved oxygen (DO) concentration), aeration duration (aerobic hydraulic retention time (HRT)), and aeration pattern (continuous/intermittent). The performance of EBPR in SBRs under various aeration strategies was investigated for different DO concentrations (0.4-4 mg/L), HRT (120-320 minute), and aeration patterns of continuous and intermittent (25 to 50 minute on/off intermittent aeration/non-aeration intervals). Moreover, this study investigated the effect of reaching micro-aeration with adaptation strategies on EBPR performance. The development of steady and instant-DO reduction in different aeration strategies was studied in batch tests with enriched PAOs at different DO levels. Subsequently, comparative modeling using calibrated BioWin software was implemented for SBRs to predict the nutrient removal performance by changing DO concentration and the aerobic-HRT and understanding the effect of parameters on treatment performance to improve operation and control.

Download or read book Biological Phosphorus Removal from Wastewater by Anaerobic anoxic Or Anaerobic aerobic Sequencing Batch Reactors written by Takahiro Kuba and published by . This book was released on 1992 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simultaneous Enhanced Biological High strength Phosphorus Removal and Nitrite Accumulation in a Lab scale Sequencing Batch Reactor written by Zhihang Yuan and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The enhanced biological phosphorus removal (EBPR) has been widely applied in treating domestic wastewater, while the performance on high-strength P wastewater is less investigated and the feasibility of coupling with short-cut nitrogen removal process remains unknown. This study first achieved the simultaneous high-efficient P removal and stable nitrite accumulation in one sequencing batch reactor for treating the synthetic digested manure wastewater. The average effluent P could be down to 0.8 ± 1.0 mg P/L and the P removal efficiency was 99.5 ± 0.8%. Candidatus Accumulibacter was the dominant polyphosphate accumulating organism with the relative abundance of 14.2-33.1%, while the presence of glycogen accumulating organisms (Defluviicoccus and Candidatus Competibacter) with relatively higher abundance (15.6-40.3%) did not deteriorate the EBPR performance. Moreover, nitrite accumulation happened in the system with the effluent nitrite up to 20.4 ± 6.4 mg N/L and the nitrite accumulation ratio was nearly 100% for 140 days (420 cycles). Nitrosomonas was the dominant ammonia-oxidizing bacteria with relative abundance of 0.3-2.4% while nitrite-oxidizing bacteria were almost undetected (

Download or read book Use of Enhanced Biological Phosphorus Removal for Treating Nutrient Deficient Wastewater written by W. F. Harper Jr and published by IWA Publishing. This book was released on 2004-01-01 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book Optimization of Biological Phosphorus and Ammonia Removal in a Combined Fixed and Suspended Growth Wastewater Treatment System written by and published by . This book was released on 1994 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was conducted to optimize design and operational criteria for enhanced biological phosphorus removal and nitrification of ammonia in the fixed growth reactor-suspended growth reactor (FGR-SGR) process. The research completed the investigation of optimum hydraulic retention times for biological phosphorus removal in both the unaerated and aerated phases of the suspended growth components of the FGR-SGR system, including an assessment of the possibility of reducing suspended growth aeration requirements by using oxidized forms of nitrogen rather than dissolved oxygen for biological phosphorus uptake; investigated the effects on biological phosphorus removal and nitrification of varying the internal recycle flow rates; and investigated the optimum solids retention time, or the optimum operating mixed liquor suspended solids concentration, in the suspended growth component of the system for biological phosphorus removal and nitrification-denitrification.

Download or read book Controlling Biosolids Phosphorus Content in Enhanced Biological Phosphorus Removal Reactors written by Sean K. Chaparro and published by . This book was released on 2002 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Removal of Phosphorus and Nitrogen from Wastewater written by Yanping Mao and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Biological Removal of Phosphorus and Nitrogen From Wastewater: New Insights From Metagenomic and Metatranscriptomic Approaches" by Yanping, Mao, 毛艷萍, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: The study was conducted to reveal the insights of microbial diversity, functional profile and gene expression of microorganisms responsible for enhanced biological phosphorus removal (EBPR) and hydrogen-oxidizing autotrophic denitrification mainly by using metagenomic and metatranscriptomic analysis based on high-throughput sequencing. Two sequencing batch reactors (SBRs) were operated to remove phosphorus (15 mg/L) from synthetic wastewater. The integrated metagenomic and metatranscriptomic approaches were adopted to retrieve a nearly complete draft genome of Candidatus Accumulibacter phosphatis (referred to Accumulibacter) in Clade IB (CAP IB HKU-1) from one of the SBRs treating saline wastewater. The CAP IB HKU-1 draft genome, being different from CAP IIA UW-1, does not possess the phosphotransferase in polyphosphate metabolism and V-ATPase for orthophosphate transport. Additionally, unlike CAP IA UW-2, CAP IB HKU-1 carries the genes for carbon fixation and nitrogen fixation. The metatranscriptomic results revealed that the most significantly up-regulated genes in CAP IB HKU-1 from the anaerobic to the aerobic phase were responsible for assimilatory sulfate reduction, genetic information processing and phosphorous absorption, while the down-regulated genes were involved in N2O reduction, PHA synthesis and acetyl-CoA formation. From another SBR, a draft genome affiliated to Accumulibacter Clade IIC (CAP IIC HKU-2) was reconstructed using two metagenomic sequence data sets. Comparative genomic analysis demonstrated that Accumulibacter of Clades IA, IB, IIA and IIC conserved the genes encoding for enzymes in glycolysis, the TCA cycle, acetate uptake, PHA synthesis and polyP metabolism, but differed in the abilities of nitrate reduction, nitrogen fixation and carbon fixation. The abundances of the Accumulibacter clades in 18 activated sludge (AS) samples from the globally distributed sewage treatment plants (STPs) were quantified by the qPCR-ppk1 assay. Clades IIC and IID were found to be dominant among the five Accumulibacter clades in 11 AS samples. And two novel Accumulibacter Clades IIH and II-I were identified. The results indicated that the wastewater characteristics could be more important to determine the proliferation of Accumulibacter clades in STP AS systems rather than the geographic location. Geographical distribution of putative polyphosphate accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) among 14 globally located STPs and their monthly microbial variation in AS of Sha-Tin STP over five years were studied by using 16S rRNA gene pyrosequencing. The structure of EBPR-related microbial community should be the result of interaction of multiple operational variables and wastewater characteristics. Thauera-dominated (with relative abundances of 47% - 62%) microbial communities carrying out hydrogenotrophic denitrification were successfully enriched from various seed sludges and characterized by 16S rRNA gene Illumina high-throughput sequencing. Nitrogen removal rates of the enriched culture were comparable to that of the model organism Paracoccus denitrificans. A genome binning pipeline was proposed to retrieve the dominant genome from an enriched hydrogenotrophic denitrifying consortium using metagenomic sequence data. A draft genome (Thauera R4) affiliated with a novel Thauera

Download or read book Investigation of Biochemical Transformations in the Enhanced Biological Phosphorus Removal Process in Laboratory scale Reactors and a Full scale Wastewater Treatment Plant written by Jens Kruse and published by . This book was released on 2007 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Enhanced Biological Phosphorus Removal Using a Sequencing Batch RBC written by Robert Simm and published by National Library of Canada. This book was released on 1988 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling Biological Phosphorus Removal in Activated Sludge Systems written by Damir Brdanovic and published by CRC Press. This book was released on 2021-10-01 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text looks at different effects on the process of biological phosphorus removal. Topics include: biological phosphorus removal processes; process and molecular ecological studies; and the effect of potassium limitation on biological phosphorus removal.