Download or read book Nutrient Removal in a Dual media Fluidized Bed Reactor written by Stephanie Ann McMackin and published by . This book was released on 2002 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Index Medicus written by and published by . This book was released on 2004 with total page 1940 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.

Download or read book Process Control for Biological Nutrient Removal Processes in Fluidized Beds Treating Low Carbon to Nitrogen Municipal Wastewater written by Joseph Donohue and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional wastewater treatment techniques - utilizing microorganisms to remove organics and nutrients (i.e. nitrogen and phosphorus) from a water stream and partially incorporate them into their cell structure - struggle to adapt with increased urbanization due to land and infrastructure requirements. The circulating fluidized-bed bioreactor (CFBBR) was developed as a way to provide biological treatment in an urbanized area by cultivating high-density bacteria on an inert media. The technology operates as a pre-anoxic nitrification/denitrification wastewater treatment process. The system is initially loaded with media, providing a platform for microbial growth. Internal recycle streams in the system provide the energy to fluidize the media - increasing mass transfer and accelerating microbial growth and pollutant removal rates. A pilot-scale CFBBR unit operated in Guangzhou, China, at an organic loading rate of 0.50 kg COD/day and a nitrogen loading rate of 0.075 kg N/day, was able to achieve a 93% reduction in carbon and an 88% reduction in nitrogen. In addition, an innovative sensor network was constructed from open source hardware to monitor and adjust dissolved oxygen (DO) levels inside a 15 L lab-scale partial nitrification fluidized-bed. The treatment strategy for this biological process was to create reactor conditions that favour nitrifying bacteria that convert ammonia to nitrite, called ammonia oxidizing bacteria (AOB), over nitrifying bacteria that convert nitrite to nitrate, called nitrite oxidizing bacteria (NOB). The CFBBR, by virtue of its unique abilities to control biofilm thickness and accordingly biological solids retention time, offers significant advantages over other emerging nitrogen removal processes. The control system was designed to automatically adjust the air flow to the bioreactor to maintain a DO level of approximately 1 mg/L, conditions that favour AOBs activity over NOBs. The unit operated continuously for 40 days as the bioreactor was fed with 200 mg/L of synthetic ammonia wastewater (devoid of carbon) to a maximum nitrogen loading rate of 6 g NH4-N/day. The control system was able to maintain an ambient DO level of 1.30 mg/L. At this loading rate, the effluent nitrate concentration was approximately 5% of the influent feed - indicating low NOB populations in the reactor.

Download or read book Biological Nutrient Removal in a Circulating Fluidized Bed Bioreactor written by Ajaykumar Patel and published by . This book was released on 2005 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Nutrient Removal from Municipal Wastewater Using a Liquid solid Circulating Fluidized Bed Bioreactor written by Nabin Chowdhury and published by . This book was released on 2009 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transactions of the American Society of Civil Engineers written by American Society of Civil Engineers and published by . This book was released on 1998 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 29-30 include papers of the International Engineering Congress, Chicago, 1893; v. 54 includes papers of the International Engineering Congress, St. Louis, 1904.

Download or read book Research Needs for Nutrient Removal from Wastewater written by and published by . This book was released on 1994 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wastewater purification treatment; Nutrient removal; Wetlands; Residuals management; Mathematical modelling.

Download or read book Construction Costs for Municipal Wastewater Treatment Plants written by and published by . This book was released on 1980 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Issues in Biotechnology and Medical Technology Research and Application 2012 Edition written by and published by ScholarlyEditions. This book was released on 2013-01-10 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Biotechnology and Medical Technology Research and Application: 2012 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Biotechnology. The editors have built Issues in Biotechnology and Medical Technology Research and Application: 2012 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Biotechnology in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Biotechnology and Medical Technology Research and Application: 2012 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Download or read book Handbook of Water and Wastewater Microbiology written by Duncan Mara and published by Elsevier. This book was released on 2003-08-07 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Access to safe water is a fundamental human need and therefore a basic human right" --Kofi Annan, United Nations Secretary General Edited by two world-renowned scientists in the field, The Handbook of Water and Wastewater Microbiology provides a definitive and comprehensive coverage of water and wastewater microbiology. With contributions from experts from around the world, this book gives a global perspective on the important issues faced in the provision of safe drinking water, the problems of dealing with aquatic pollution and the processes involved in wastewater management. Starting with an introductory chapter of basic microbiological principles, The Handbook of Water and Wastewater Microbiology develops these principles further, ensuring that this is the essential text for process engineers with little microbiological experience and specialist microbiologists alike. Comprehensive selection of reviews dealing with drinking water and aquatic pollution Provides an understading of basic microbiology and how it is applied to engineering process solutions Suitable for all levels of knowledge in microbiology -from those with no background to specialists who require the depth of information

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wastewater Treatment written by David H.F. Liu and published by CRC Press. This book was released on 2020-08-18 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an exhaustive compilation of current knowledge, Wastewater Treatment covers subjects that run the gamut from wastewater sources, characteristics, and monitoring to chemical treatments and nutrient removal. Thoroughly examining basic and advanced topics, this resource has it all. The wealth of easy-to-use tables and illustrations provides quick and clear references, making it indispensable. Schematic drawings of equipment and devices explain the technology and techniques. With the level of detail included, you can count on finding both introductory material and very technical answers to complex questions. It's seamless style clearly delineates what can and must be done to continue to improve the quality of our water. Wastewater Treatment is a valuable resource; appropriate for engineers and students but readable enough for anyone interested in the discipline. Béla G. Lipták speaks on Post-Oil Energy Technology on the AT&T Tech Channel.

Download or read book Nutrient Removal WEF MOP 34 written by Water Environment Federation and published by McGraw Hill Professional. This book was released on 2010-09-28 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Latest Methods for Nutrient Removal from Wastewater This Water Environment Federation resource provides comprehensive information on biological and chemical methods for nitrogen and phosphorus removal from wastewater. Nutrient Removal covers environmental and regulatory issues and provides an integrated approach for combined nitrogen and phosphorus removal, including details on ammonia and dewatering liquors treatment. Natural treatment systems are also discussed in this definitive guide. Nutrient Removal covers: Nutrients and their effects on the environment Regulation of nutrients in the effluents of wastewater treatment plants Overview of the nutrient removal processes Principles of biological nitrogen removal Nitrification Nitrogen removal processes, configuration, and process-sizing criteria for combined nitrification and denitrification processes Chemical and biological phosphorus removal Sidestream nitrogen removal Structured process models for nutrient removal Troubleshooting for full-scale nutrient removal facilities Aquatic natural treatment systems

Download or read book Microbial Technologies for Wastewater Recycling and Management written by VINEET KUMAR and published by CRC Press. This book was released on 2022-11-08 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the innovative and emerging microbial technologies for the treatment, recycling, and management of industrial, domestic, and municipal water and other wastewater in an environment-friendly and cost-effective manner. It discusses existing methods and technologies, up-gradation of existing technologies, and new technologies. It also highlights opportunities in the existing technologies along with industrial practices and real-life case studies.

Download or read book Current Developments in Biotechnology and Bioengineering written by Hao Huu Ngo and published by . This book was released on 2020-02 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Developments in Biotechnology and Bioengineering: Advanced Membrane Separation Processes for Sustainable Water and Wastewater Management -Anaerobic Membrane Bioreactor Processes and Technologies gives an up-to-date review on research developments of AnMBR systems (including hybrid systems) in wastewater treatment in terms of pollutants removal, nutrients recovery and energy production, as well as the achievement of energy efficiency of the process itself. The current challenges that hinder the application and industrialization of AnMBR technology, knowledge gaps and future research perspectives are also explained and discussed with potential strategies for solving problems. The book is a potential resource for engineers, scientists, educators, students and general public to understand the current developments and future prospects in field of AnMBR research. Covers different aspects of AnMBR in wastewater treatment, such as fundamental knowledge, process design and evaluation, operation and optimization and applications Focuses on different AnMBR configurations and systems/hybrid systems in treating a large variety of wastewaters Provides state-of-the-art technology development of AnMBR technology, advantages and challenges, as well as the strategies to overcome the limitations Includes AnMBR technology in removing the priority substances (PSs) and emerging contaminants of environmental concern, as well as an evaluation of energy potentials in wastewater treatment

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