Evaluation of Performance and Operational Costs for Three Biological Nutrient Removal Schemes at a Full-scale Wastewater Treatment Plant PDF Download

Author: Karl G. Linden
Publisher:
ISBN:
Category : Sewage
Languages : en
Pages : 156

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Author: Mary Patricia Bonislawsky
Publisher:
ISBN:
Category : Sewage
Languages : en
Pages : 374

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Book Description
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.

Author: Clifford W. Randall
Publisher: CRC Press
ISBN: 9780877629221
Category : Technology & Engineering
Languages : en
Pages : 454

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Book Description
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.

Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 806

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Author: Nigel J. Horan
Publisher: CRC Press
ISBN: 9781566760997
Category : Technology & Engineering
Languages : en
Pages : 396

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Book Description
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.

Author: Water Environment Federation
Publisher: McGraw Hill Professional
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 656

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MOP 109 & WEF MOP 30 describes the theory, equipment, and practical techniques needed to optimize BNR in varied environments.

Author:
Publisher:
ISBN:
Category : Water resources development
Languages : en
Pages : 232

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Author: Rachel Stewart
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Increasing energy costs and climate change necessitate an optimization of energy use at wastewater treatment plants for a sustainable future. Aeration within the biological nutrient removal (BNR) process accounts for a large portion of energy consumption at a wastewater treatment plant. As such, reducing the aeration input is considered a primary solution to reducing the energy required for wastewater treatment. While successful BNR at lower than conventional dissolved oxygen (DO) concentrations has been demonstrated, challenges remain before reduced aeration can be implemented at full-scale. In Chapter 1, we first compared two automated aeration control strategies under low-DO conditions in two pilot-scale treatment systems. We showed that effective, year-round BNR can be achieved with both strategies by increasing the solids retention time. However, both pilot-scale processes experienced poor solids settleability during the winter. While settleability was recovered during warmer temperatures, improving settling quality under low-DO remains a challenged to be resolved. In Chapter 2, we investigated the short- and long-term effect of DO reductions on the production and emission of nitrous oxide, a potent greenhouse gas. We found that while increases in nitrous oxide production and emission immediately followed DO reductions, long-term emissions decreased after prolonged operation under low-DO conditions. Process nuisances and performance deviations (e.g. nitrite accumulation) also corresponded with increased emissions. Finally, in Chapter 3, we used genome-resolved metagenomics and metatranscriptomics to explore the diversity and dynamics of the Candidatus Accumlibacter lineage, key organisms contributing to phosphorus removal from wastewater. We found that Accumulibacter community was highly diverse across time in multiple pilot-scale low-DO systems, supporting evidence that most members of this lineage have a high affinity for oxygen. The information gained in these studies expands on the feasibility and implications of low-DO wastewater treatment at full-scale and adds to our understanding of the microbial community carrying out BNR under these conditions.

Author: Kenneth John Hartley
Publisher:
ISBN: 9781875298976
Category : Sewage
Languages : en
Pages : 192

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Author: Water Environment Federation
Publisher: McGraw-Hill Education
ISBN: 9780071737098
Category : Technology & Engineering
Languages : en
Pages : 0

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Book Description
Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product.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