Download or read book Process Improvements in Biological Nutrient Removal Systems for Better Wastewater Treatment Performance written by Shengnan Xu and published by . This book was released on 2014 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Process improvements for better wastewater treatment performance are necessary with stringent discharge requirements. The main objective of this research is to develop new wastewater treatment technologies for improved nutrient removal and the degradation of recalcitrant organic nitrogen compounds. In this research, a reverse A2 /O system demonstrated better phosphorus removal efficiency than the regular A2 /O system by inverting the sequence of anaerobic and anoxic zones. Placing an anoxic stage before the anaerobic stage in the reverse A2 /O process resulted in a lower oxidation-reduction potential in the anaerobic zone, which contributed to higher P uptake by bacteria under subsequent aerobic respiration. With the development of emerging environmental nanotechnology, the effectiveness of nano zero-valent iron (NZVI) in nutrient removal was also determined under anaerobic, anoxic and aerobic conditions. The highest P removal efficiency (95% at the initial P concentration of 10 mg/L) by NZVI was observed under anoxic abiotic conditions. Furthermore, new applications of NZVI as an antiseptic/antimicrobial material were extended to sludge bulking control. In two Modified Ludzack-Ettinger (MLE) activated sludge treatment systems, a single dose of NZVI at the final concentration of 100 mg Fe/L in the mixed liquor reduced the number of filamentous bacteria Type 021N by 2-3 log units (a reduction of 99.9 and 96.7% in MLE tank #1 and #2, respectively). Additional benefits of the use of NZVI such as improved P removal was also determined. The side effect of the use of NZVI depended on sludge bulking conditions and biomass concentration. In the last part of this dissertation, process improvements to remove recalcitrant organic N compounds such as melamine were evaluated. Melamine is a nitrogen-rich (67% nitrogen by mass) heterocyclic aromatic compound that could significantly increase effluent total nitrogen concentrations. The degradation of melamine and its impact on activated sludge operation in conventional activated sludge (CAS) systems and MBRs with high biomass concentrations were compared. Melamine was dosed continuously in CAS and MBR systems at an influent concentration of 3 mg/L for about 100 days. Even after such a long period of sludge adaptation, melamine appeared not to be easily biodegradable in any of the CAS and MBR systems indicating that selective enrichment of special microbes (melamine degradation specialists) and the special enzymes responsible for melamine degradation cannot be induced through acclimation. However, a significant reduction in toxicity of melamine to the activated sludge was observed in MBR systems, demonstrating the significance of MBR operation at high sludge concentrations.
Download or read book An Operator s Guide to Biological Nutrient Removal BNR in the Activated Sludge Process written by Michael H. Gerardi and published by Chemical Publishing Company. This book was released on 2016-05-19 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents - List of Tables - List of Figures - PART ONE: NITRIFICATION - Chapter 1 Introduction - Chapter 2 Nitrogenous and Phosphorous Compounds - Chapter 3 Nitrification: The Basics - Chapter 4 Nitrifying Bacteria - Chapter 5 Nitrification and Limiting Factors - Chapter 6 Promoting Nitrification - PART TWO: DENITRIFICATION - Chapter 7 Denitrification: The Basics - Chapter 8 Denitrifying Bacteria - Chapter 9 Denitrification and Limiting Factors - PART THREE: BIOLOGICAL PHOSPHORUS REMOVAL - Chapter 10 Biological Phosphorus Removal: The Basics - Chapter 11 EBPR: Process Control - Abbreviations and Acronyms - Glossary - Bibliography - Biological nutrient removal (BNR), the removal of nitrogen and phosphorus from wastewater, is a complex process. Although the activated sludge process is an efficient technology for the removal of biochemical oxygen demand (BOD) and total suspended solids (TSS), it provides less-than-optimal conditions for the removal of nitrogen and phosphorus, and presents numerous challenges to the operator trying to satisfy the many requirements for several different groups of bacteria. In addition to satisfying the requirements there are numerous, highly variable operational conditions that impact BNR. These conditions include: changes in strength and composition of the wastewater, alkalinity and pH, temperature, and presence of inhibitory and toxic wastes. Even fluctuations in flows, especially from inflow and infiltration, can adversely impact the aerobic, anoxic, and anaerobic conditions needed for successful BNR. Of the three treatment processes, nitrification, denitrification, and enhanced biological removal, nitrification is often the most difficult to achieve. Therefore, a large portion of this book reviews nitrification. Operators of the activated sludge process need to understand the basic biological, chemical, and physical requirements for BNR in order to improve the performance of these treatment processes. An Operator's Guide to Biological Nutrient Removal (BNR) in the Activated Sludge Process is intended to help operators in the monitoring, troubleshooting, and process control of BNR. Numerous tables and figures are included in the book to help the operator understand the biological and chemical reactions that are involved in BNR processes and how the reactions can be monitored for process control. Design of BNR processes is not addressed in this book. Design is addressed in numerous engineering publications. The book serves to help operators achieve permit compliance for nitrogen and phosphorus discharge limits and obtain cost-effective operation. -
Download or read book Improvement in Performance and Biological Nutrient Removal of the Lakeside Wastewater Treatment Plant written by Clifford Randolph Elgin and published by . This book was released on 1997 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Environmental Materials Management written by Chaudhery Mustansar Hussain and published by Springer. This book was released on 2019-06-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference work analyzes and assesses global environmental management techniques for environmental materials with a focus on their performance and economic benefits, proposing eco-friendly solutions and designating policies that will sustain the environment for future generations. It addresses management of environmental materials as not only a complex anthropogenic problem, but also as an expensive problem that needs to be managed sustainably. Simultaneously, it considers the environmental and economic benefits involved in the high levels of investment and operation costs required to develop effective materials collection and management systems in modern society.
Download or read book Advances in Water and Wastewater Treatment written by Martin P. Wanielista and published by Butterworth-Heinemann. This book was released on 1978 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Wastewater Treatment written by Mogens Henze and published by IWA Publishing (International Water Assoc). This book was released on 1881 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: For information on the online course in Biological Wastewater Treatment from UNESCO-IHE, visit: http://www.iwapublishing.co.uk/books/biological-wastewater-treatment-online-course-principles-modeling-and-design Over the past twenty years, the knowledge and understanding of wastewater treatment have advanced extensively and moved away from empirically-based approaches to a first principles approach embracing chemistry, microbiology, physical and bioprocess engineering, and mathematics. Many of these advances have matured to the degree that they have been codified into mathematical models for simulation with computers. For a new generation of young scientists and engineers entering the wastewater treatment profession, the quantity, complexity and diversity of these new developments can be overwhelming, particularly in developing countries where access is not readily available to advanced level tertiary education courses in wastewater treatment. Biological Wastewater Treatment addresses this deficiency. It assembles and integrates the postgraduate course material of a dozen or so professors from research groups around the world that have made significant contributions to the advances in wastewater treatment. The book forms part of an internet-based curriculum in biological wastewater treatment which also includes: Summarized lecture handouts of the topics covered in book Filmed lectures by the author professors Tutorial exercises for students self-learning Upon completion of this curriculum the modern approach of modelling and simulation to wastewater treatment plant design and operation, be it activated sludge, biological nitrogen and phosphorus removal, secondary settling tanks or biofilm systems, can be embraced with deeper insight, advanced knowledge and greater confidence.
Download or read book Design and Retrofit of Wastewater Treatment Plants for Biological Nutritient Removal written by Clifford W. Randall and published by CRC Press. This book was released on 1998-05-06 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents information that can be used for the design and operation of wastewater treatment plants that utilize biological nutrient removal processes, i.e., processes that utilize biological mechanisms instead of chemical mechanisms, to remove phosphorus and nitrogen from wastewaters. The book provides: basic fundamentals, concepts, and theories; design of prefermentation units, various types of BNR systems, and secondary clarifiers; retrofitting conventional activated sludge plants; modeling considerations; and special considerations for BNR systems. It includes full-scale and pilot plant case histories, design examples, and retrofit of existing plants.
Download or read book Biological Nutrient Removal BNR Operation in Wastewater Treatment Plants WEF Manual of Practice No 30 written by Water Environment Federation and published by McGraw Hill Professional. This book was released on 2006 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: MOP 109 & WEF MOP 30 describes the theory, equipment, and practical techniques needed to optimize BNR in varied environments.
Download or read book Advances in Wastewater Treatment written by Giorgio Mannina and published by IWA Publishing. This book was released on 2018-10-15 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Wastewater Treatment presents a compendium of the key topics surrounding wastewater treatment, assembled by looking at the future technologies, and provides future perspectives in wastewater treatment and modelling. It covers the fundamentals and innovative wastewater treatment processes (such as membrane bioreactors and granular process). Furthermore, it focuses attention on mathematical modelling aspects in the field of wastewater treatments by highlighting the key role of models in process design, operation and control. Other topics include: • Anaerobic digestion • Biological nutrient removal • Instrumentation, control and automation • Computational fluid dynamics in wastewater • IFAS systems • New frontiers in wastewater treatment • Greenhouse gas emissions from wastewater treatment Each topic is addressed by discussing past, present and future trends. Advances in Wastewater Treatment is a valid support for researchers, practitioners and also students to have a frame of the frontiers in wastewater treatment and modelling.
Download or read book Seafood written by Zdzislaw E. Sikorski and published by CRC Press. This book was released on 1990-04-25 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This must-have resource focuses on marine food composition as it relates to nutrition. Filled with illustrations and graphs, it describes the biological and technical factors which effect the availability and quality of seafood resources and provides information on the biochemical changes, functional properties, contents, and biological value of the main components of the major marine food organisms. It presents the yield of edible parts for the different species and the applied procedures of processing and culinary preparation. This volume is intended for the general reader who is interested in food production, marketing, and nutrition, and is also an ideal text for students of food science as well as professionals in the food trade and fish industry.
Download or read book Evaluation of Performance and Operational Costs for Three Biological Nutrient Removal Schemes at a Full scale Wastewater Treatment Plant written by Karl G. Linden and published by . This book was released on 2001 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Technologies for the Treatment and Recovery of Nutrients from Industrial Wastewater written by Val del Río, Ángeles and published by IGI Global. This book was released on 2016-10-21 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of wastewater from various human and industrial activities has a harsh impact on the environment. Without adequate treatment, the disposal of this wastewater poses a threat to the quality of water globally. Technologies for the Treatment and Recovery of Nutrients from Industrial Wastewater investigates emergent research and best practices within the field of wastewater management. Highlighting novel technological tools in wastewater treatment, effective nutrient removal technologies, and innovative solutions to quality water preservation practices, this book is a critical reference source for professionals, scientists, academics, and students.
Download or read book Current Developments in Biotechnology and Bioengineering written by Xuan-Thanh Bui and published by Elsevier. This book was released on 2022-08-19 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Biological Wastewater Treatment Systems covers different recent advanced technologies, including green technologies, for biological wastewater treatment and wastewater reuse. The technologies involve novel biological processes and/or modified processes coupled with nano materials for improving the performance of the existing treatment processes. The book also describes treatment strategies for the current pollution from complex organic matter, nutrients, toxic substances, micro plastics and emerging micro pollutants in different water resources. The treatment processes describe the recent developed technologies for wastewater treatment and reuse such as biological nutrient removal, bioreactors, photobioreactors, membrane bioreactors, wetlands, algae-bacteria process, natural treatments, integrated/hybrid bio systems, etc. The novel bio systems include aerobic, anaerobic, facultative operation modes with various of types of microorganisms. Provides updated information on biological nutrient removal from wastewater Includes anaerobic and aerobic wastewater treatment processes Provides state-of-art information on design and operation of novel systems, including membrane bioreactors Describes hybrid treatment processes
Download or read book Tuning Biological Nutrient Removal Plants written by Ken Hartley and published by IWA Publishing. This book was released on 2013-04-30 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tuning Biological Nutrient Removal Plants increases interest in tuning to enhance both performance and capacity, to provide insight into typical plant operating characteristics, and to stimulate operators' interest in studying the behaviour of their own plants. The book focuses on understanding of plant behavioural characteristics so that optimum performance can be achieved and maintained. Tuning Biological Nutrient Removal Plants is carefully organized to cover: influent and effluent characteristics; process fundamentals; individual process characteristics; overall plant characteristics; the evolutionary operation approach to tuning. The approach is practical and the use of mathematics is kept to a minimum and information is supplied in graphical and tabular form. Real operating data from a wide range of plant experiences is included. The book draws on the generosity of many Australian plant owners in permitting their plant data to be incorporated. Not all process types are covered but the tuning principles expounded are universally applicable. The capacity and performance capabilities of a plant are not fixed; both are amenable to on-going enhancement through systematic and enthusiastic effort. The book helps to set new benchmarks in plant operation. Tuning Biological Nutrient Removal Plants is a valuable resource for sewage treatment operations and operations support personnel, sewage process design engineers - operating authorities, consultants, contractors, operators of industrial wastewater treatment plants and sewage treatment lecturers in chemical engineering departments and other training organisations. About the author: Ken Hartley, B.Tech, M.Eng.Sc Fellow, Institution of Engineers, Australia Member Australian Water Association Member International Water Association. Ken Hartley has 45 years' experience in the water and wastewater industry. He has worked for the South Australian water and wastewater authority, consultants GHD and the University of Queensland. Since 1998 he has been an independent consulting process engineer.
Download or read book Comparison of Performance and Operational Costs for Three Biological Nutrient Removal Schemes at a Full scale Wastewater Treatment Plant written by Mary Patricia Bonislawsky and published by . This book was released on 2000 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: A two-year nutrient removal study was conducted at McDowell Creek Wastewater Treatment Plant in Charlotte, North Carolina. The overall objective of the research was to evaluate performance and operational costs for three biological nutrient removal schemes implemented at the plant, including documenting and monitoring effluent nitrogen and phosphorus levels for each configuration, and tracking the operations, maintenance and chemical input costs for operation. The nutrient removal schemes evaluated included the University of Cape Town/Virginia Initiative Plant (UCT/VIP) process, the Charlotte North Carolina (CNC) process, the modified Orange Water and Sewer Authority (OWASA) process, and the chemical phosphorus removal process. All processes were successful in removing phosphorus and nitrogen from the wastewater to meet permit limits of 1 mg/L and 10 mg/L for total phosphorus and nitrogen respectively. All processes required supplemental acetic acid feed to assist in anaerobic phosphorus release. Problems with process stability were encountered due to the plant expansion underway, and it was discovered that each process must be closely monitored to ensure efficient removal. Low levels of alum addition for phosphorus precipitation were necessary to meet regulatory limits during periods of instability.
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.
