Download or read book Biological Nutrient Removal for High Strength Wastewater Using Combined Anaerobic Ponds and Sequencing Batch Reactor written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanism and Design of Sequencing Batch Reactors for Nutrient Removal written by Derin Orhon and published by IWA Publishing. This book was released on 2005-05-31 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sequencing batch reactor (SBR) is perhaps the most promising and viable of the proposed activated sludge modifications today for the removal of organic carbon and nutrients. In a relatively short period, it has become increasingly popular for the treatment of domestic and industrial wastewaters, as an effective biological treatment system due to its simplicity and flexibility of operation. Mechanism and Design of Sequencing Batch Reactors for Nutrient Removal has been prepared with the main objective to provide a unified design approach for SBR systems, primarily based on relevant process stoichiometry. Specific emphasis has been placed upon the fact that such a unified design approach is also by nature the determining factor for the selection of the most appropriate cyclic operation scheme, the sequence of necessary phases and filling patterns for the particular application. The proposed basis for design is developed and presented in a stepwise approach to cover both organic carbon and nutrient removal, domestic and industrial wastewaters, strong and specific wastes. The merits of model simulation as an integral complement of process design, along with performance evaluation of SBR models are also emphasized. Scientific and Technical Report No. 19

Download or read book Nutrient Removal in Anaerobic Sequencing Batch Reactor Combined with Anaerobic aerobic Sequencing Batch Reactor for Piggery Wastewater Treatment written by Wimalin Klaewtanong and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Nutrient Removal from Industrial Wastewater Using a Sequencing Batch Reactor written by Siphesihle Mangena Khumalo and published by . This book was released on 2018 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nutrient Removal in Anaerobic Sequencing Bactch sic Reactor Combined with Anaerobic Aerobic Sequencing Batch Reactor for Piggery Wastewater Treatment written by Wimalin Klaewtanong and published by . This book was released on 2003 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Nitrogen Removal from Wastewater in a Sequencing Batch Reactor written by Joann Silverstein and published by . This book was released on 1980 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Upgrading the Existing Anaerobic Filter in the Biological Nutrient Removal of Slaughterhouse Wastewater Using an Additional Anaerobic Sequencing Batch Reactor AnA2 O2 SBR written by Sompong Boonfruang and published by . This book was released on 2003 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterizing Mechanisms of Simultaneous Biological Nutrient Removal During Wastewater Treatment written by P. F. Strom and published by IWA Publishing. This book was released on 2004-01-01 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simultaneous biological nutrient removal (SBNR) is the removal of nitrogen and/or phosphorus in excess of that required for biomass synthesis in biological wastewater treatment systems where there are no defined anaerobic and/or anoxic zones. The hypothesis is that one or more of three mechanisms is responsible within individual systems: variations in the bioreactor macroenvironment created by the mixing pattern, gradients within the floc microenvironment, and/or novel microorganism activity. Understanding of the mechanisms of SBNR can be expected to lead to improved efficiency and reliability in its application. Preliminary work documented SBNR in 7 full-scale OrbalTM closed loop bioreactors. A batch assay demonstrated that novel microorganism activity was of little importance in SBNR at the three plants tested. While the floc microenvironment likely plays an important role in nitrogen removal in such plants, it cannot explain phosphorus removal. A computational fluid dynamics (CFD) model was developed to elucidate the role of the bioreactor macroenvironment in SBNR. This is the first reported application of CFD to activated sludge biological wastewater treatment. Although the software and computational requirements limited model complexity, it still simulated the creation of dissolved oxygen gradients within the system, demonstrating that the anaerobic zones required for SBNR could occur.

Download or read book Factors Affecting Wastewater Biological Nutrient Removal in a Sequencing Batch Reactor SBR written by Shannon Irvin and published by . This book was released on 2005 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Combining Domestic Wastewater with Fruit Canning Industrial Wastewater for Nutrient Removal in Shorten Operating Cycle of an Anaerobic Sequencing Batch Reactor AnA2 O2SBR written by Anuchid Zummapetcharat and published by . This book was released on 2004 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Nutrient Removal in Bench scale Membrane Bioreactor and Full scale Sequencing Batch Reactor Under Various Configurations and Conditions written by Cagatayhan Bekir Ersu and published by . This book was released on 2006 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological nutrient removal was studied and modeled for a submerged bench-scale membrane bioreactor (MBR). Of the five configurations studied, the configuration with mixed liquor recirculation to the anaerobic compartment and permeate recirculation to the anoxic compartment gave the best results with 92.3 % sCOD, 75.6% TN, 62.4% TP removal, and almost complete nitrification (97.7%) at 25 days SRT and 2 hrs anaerobic, 2 hrs anoxic and 8 hrs oxic HRTs. When recirculation rates were varied within the same configuration, the highest TP removal was 88.1% with 300%/100% (mixed liquor/permeate) recirculation while the highest TN removal (90.3%) was with 200%/300% recirculation. TN and TP concentrations as low as 4.2 ± 0.1 mg/L and 1.4 ± 0.2 mg/L were obtained, respectively. The Biowin® AS/AD model, calibrated against a set of experimental data, predicted the effluent TN, TP and NO3− -N concentrations of MBR for varying recirculation configurations. Varying the SRT in the MBR impacted nutrient removal with 77.9% TN and 70.3% TP removal for 25 days SRT, 80.6% TN and 75.5% TP removal for 50 days SRT, and 84.8% TN and 61.5% TP removal for 75 days SRT. Biowin® modeling showed that the anoxic heterotrophic yield, oxic endogenous decay rate, anoxic hydrolysis factor, anaerobic hydrolysis factor, and fermentation rate increased proportionally with SRT. The estimated microbial kinetic parameters from Biowin® modeling for various SRTs predicted the experimental effluent quality at an SRT of 35 days. Incorporation of anaerobic, anoxic, and oxic sequences with intermittent aeration into the cycles of a full-scale sequencing batch reactor system (SBR) resulted in improvement in biological nutrient removal for the treatment of municipal wastewater and wastewater from a salad dressing plant. The two modified SBR schemes tested provided excellent sCOD removal (93 - 98%), TN removal (84 -90%) and TP removal (86 - 88%) in comparison to the regular SBR scheme which gave 55% TN removal and 45% TP removal. Winter temperatures impacted TN and TP removal negatively but did not impact sCOD and NH3-N removal.

Download or read book Nutrient Removal from Wastewaters written by Nigel J. Horan and published by CRC Press. This book was released on 1994-10-06 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics in the book include: novel processes, removal of ammonia and nitrogen, retrofitting/upgrading treatment plants for nutrient removal, and operating experiences at full-scale plants. Nutrient removal from wastewaters is a critical topic in every region. Problems can arise from domestic sewage, industrial wastewater, or rainwater runoff.

Download or read book Biological Nutrient Removal Using Sequencing Batch Bioreactor written by Muhamad Yasin Ismail and published by . This book was released on 2009 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to control the eutrophication problems, the removal of phosphorus has been increasingly important. The biological phosphorus removal using sequencing batch reactor (SBR) was investigated using simulated municipal wastewater. Experiments were carried out in eight sequencing batch reactors (SBRs) at hydraulic retention time (HRT) of 5 d. The experiment is operated at loading rates (LR) of 5.0, 4.5, 4.0, 3.5 and 3.0 mg/L.d. The mixed cultured growth is increased with the increasing of LR according to the suspended solids readings. The graph of the suspended solid concentration, the phosphorus removal and the chemical oxygen demand (COD) removal is almost same which is increasing by time and loading rate. The higher the loading rate, the higher the value of suspended solid, phosphorus removal and COD removal. LR 5 mg/L.d shows the highest suspended solid (SS) concentration with average value of 846.24 mg/L. The highest value of phosphorus removal is at loading rate 5.0 mg/L.d with average removal of 57.38%. The COD removal is also highest at loading rate 5.0 mg/L.d with average removal of 64.33%. The removal was influenced by the biofilm growth according to the suspended solid readings. The highest SS reading give the highest removal for both phosphorus and COD. According to the Design Expert plotted, the highest phosphorus removal can be achieved at LR 5.0 mg/L with 56.89% removal. Same result in Design Expert for COD removal which give the highest removal of 61.69% at LR 5.0 mg/L.d. As for the SS concentration, the Design Expert determine that the optimum value of SS is at LR 5.0 mg/L.d with the value of 840.92 mg/L.

Download or read book Biological Nutrient Removal BNR Operation in Wastewater Treatment Plants written by Water Environment Federation and published by McGraw Hill Professional. This book was released on 2005-11-15 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: BNR is a fast-growing method of removing biological pollutants (bacteria, etc.) from wastewater. Experts from both the Water Environment Federation and the American Society of Civil Engineers have collaborated on this definitive work which is intended to be a practical manual for plant managers and operators who needed current information on BNR.

Download or read book Biological Nutrient Removal from Municipal and Industrial Wastewater Using a Twin Circulating Fluidized Bed Bioreactor written by Mehran Andalib and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological nutrient removal (BNR) refers to removal of carbon (C), nitrogen (N) and phosphorus (P) from wastewater (WW) by the aid of various microorganisms. Because of the public concern for the environment C, N and P effluent standards have become stricter. Different BNR processes such as suspended growth and attached growth have been studied during the last three decades in order to meet the increasingly stringent discharge standards. In this work, two novel processes called Twin Fluidized Bed Bioreactor (TFBBR) and Twin Circulating Fluidized Bed Bioreactor (TCFBBR) were developed and tested for BNR from municipal WW. Both TFBBR and TCFBBR comprise of an anoxic column and an aerobic column with particle recirculation between the two reactors achieved mechanically (TFBBR) and hydraulically (TCFBBR). Moreover, a newly developed system called Anaerobic Fluidized-Circulating Fluidized Bed Bioreactor (AF-CFBBR) was developed and tested to accomplish BNR from high strength industrial WW. AF-CFBBR comprises of an anaerobic, an anoxic and an aerobic columns. In all three aforementioned systems, fine carrier media are employed for biofilm attachment. After the development of biofilm, the particles are called biofilm-coated particles. TFBBR and TCFBBR were operated at organic, nitrogen and phosphorus loading rates (OLR, NLR and PLR) of up to 2.8 kg COD/m3×d and 4.5 kg COD/m3×d, 0.3 kg N/m3×d and 0.5 kg N/m3×d and 0.041 kg P/m3×d respectively to study the performance of the system with respect to biological nutrient removal. The nitrification rates based on biofilm surface area in TFBBR and TCFBBR were 0.91 g N/m2×d and 1.26 g N/m2×d respectively and the denitrification rates based on biofilm surface area in TFBBR and TCFBBR were 0.65 g N/m2×d and 1.32 g N/m2×d respectively. Both systems removed>96% organic matter, 84%-88% nitrogen and 12%-50% phosphorus at overall hydraulic retention time of (HRT) 2h. TFBBR and TCFBBR achieved long SRTs of 72-108 d and 37-40 d respectively, which rationalized the very low observed yield of 0.06-0.07 g VSS/g COD and 0.09-0.1 g VSS/g COD. The AF-CFBBR demonstrated 99.7% COD removal, 84% nitrogen removal, with a very low sludge yield of 0.017 g VSS/g COD while treating a wastewater containing 10700 mg COD/L and 250-300 mg NH3-N/L. The system was operated at an organic loading rate (OLR) of 35 kg COD/m3·d based on the AF volume and 1.1 kg N/m3·d based on the CFBBR at an overall HRT of less than 12 h in the AF-CFBBR. The nitrification, denitrification and organic removal rates based on aerobic, anoxic and anaerobic biofilm surface area in AF-CFBBR respectively were 2.6 g N/m2×d, 9.03 g N/m2×d and 12.1 g COD/m2×d. Additionally, the inhibitory effect of nitrate on methanogenic activities in a high rate anaerobic fluidized bed with organic loading rate of above 35 kg COD/m3·d was studied in order to evaluate the feasibility of simultaneous denitrification and methanogenic activities (SDM) in a high rate anaerobic system. Terminal settling velocity and bed expansion of biofilm-coated particles as the two main hydrodynamic criteria in a fluidized bed, were studied. Archimedes was superior to Reynolds number for drag coefficient and bed expansion definitions. A new equation for determining drag force on fluidized bed bio-film coated particle (Fd) as an explicit function of terminal settling velocity was generated based on Archimedes numbers (Ar) of the biofilm coated particle. The proposed equation adequately predicted the terminal settling velocity of other literature data with an accuracy of>90%. A new equation based on Archimedes number was proposed to calculate bed expansion index of biofilm-coated particles, which predicted the existing experimental data with less standard error than all other literature equations that related bed expansion to Reynolds number. A two-phase and three-phase predictive fluidization model based on the characteristics of a system such as media type and size, flow rates, and reactor cross sectional area was proposed to calculate bed expansion, solid, liquid and gas hold up, specific surface area of the biofilm particles. The model was subsequently linked to 1d AQUIFAS APP software (Aquaregen) to model two and three phase fluidized bed bioreactors. The model was validated for biological nutrient removal using the experimental data from a Twin Circulating Fluidized Bed Bioreactors (TCFBBR) treating synthetic and municipal wastewater. Two-sided t-tests showed that there were no statistically significant difference between the experimental and the modeled TCOD, SCOD, NH3-N, NOx-N.

Download or read book Biological Nutrients Removal in the Anaerobic Anoxic Oxic Wastewater Treatment Process written by Changyong Wu and published by Nova Science Publishers. This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Anaerobic-anoxic-oxic (A2/O) is one of the most widely used processes in municipal wastewater treatment plants for simultaneous biological nitrogen and phosphorus removal. The A2/O process has many advantages, such as simple configuration and short hydraulic retention time (HRT), etc. In addition, it is easy to operate. Therefore, A2/O will be continuously chosen as the main option in all kinds of newly designed and built wastewater treatment plants. Though the A2/O process has been used widely, it has some inherent contradictions which are difficult to overcome. For example, the contradiction between substrate competition and SRT makes the high nitrogen and phosphorus removal unable to be achieved simultaneously. As a result, the removal efficiency of the system cannot be further improved. In the past 10 years in China, the wastewater quality very obviously changed with the improvement of living conditions. At present, municipal wastewater with a low C/N ratio is rather common in most countries in the world. The lack of a carbon source will make the inherent contradictions of the A2/O process becomes serious. Therefore, the conventional design parameters of the A2/O process are needed to adjust or the configuration of the A2/O process should change to fit the change of the wastewater quality. According to this, this book systematically describes how to improve the nitrogen and phosphorus removal efficiency of municipal wastewater with low C/N ratio, and effectively utilize the carbon resource in the influent of wastewater. This publication is useful for students, researchers and engineers whose major focus is municipal and the environment"--

Download or read book Sequencing Batch Reactor Technology written by Peter A. Wilderer and published by IWA Publishing. This book was released on 2001-03-01 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report highlights various types of SBRs, design considerations and procedures, equipment required, and experiences gained from practical applications. This report will help both designers and operators of SBRs understand how to use this technology successfully. The focus is on the application of fill-and-draw, variable volume, periodically operated, unsteady-state principles to activated sludge systems. Research findings are presented, from both the laboratory and pilot and full scale SBRs. Also included is a description of trends for technological developments and a discussion of open questions regarding research, development, application, and operation. Contents Introduction Fundamentals of Periodic Processes General Overview of SBR Applications Design of Activated Sludge SBR Plants Equipment and Instrumentation Practical Experiences Evaluation of SBR Facilities in Australia Evaluation of SBR Facilities in the USA and Canada Evaluation of SBR Facilities in Germany Evaluation of SBR Facilities in France Evaluation of SBR facilities in Japan Scientific and Technical Report No. 10