Manual of Practice Series

Odor Emissions and Control for Collection Systems and Water Resource Recovery Facilities, 2nd edition, is intended to be the primary reference document for current standards of practice for professionals involved in odor control at wastewater treatment facilities and collections systems. This manual covers all aspects of odor control in wastewater conveyance and treatment facilities, including the basics of odor testing and emissions, sensory analysis, local and state regulations, public outreach, and the technologies used to treat odors. Odor testing and control have undergone rapid advancements since the publication of the first edition of the Water Environment Federation's Manual of Practice 25, Control of Odors and Emissions from Wastewater Treatment Plants. The second edition brings an expanding body of knowledge and real-world experiences to the reader, and it embodies the current state of practice in the industry. The entire manual provides a comprehensive look at all aspects of odor control in the industry today. A new feature of this manual not included in the 2004 edition is the chapter entitled "Collection Systems," which addresses ventilation of sewers, air treatment, and chemical treatment. Odor control in water resource recovery facilities (WRRFs) and solids handling facilities are also covered extensively. This manual also presents best available biological, chemical, and physical technologies for controlling odors; information on analyzing, measuring, and sampling odors; and tools for assessing odor impacts in surrounding neighborhoods and communities. In short, this manual teaches the proper aspects of how to be a good neighbor and share clean air around a treatment facility, while still providing indispensable wastewater services to the larger community.

Global climate change, volatile energy prices, and other potential forces of change, require water resource recovery facility designers to plan and design facilities that are sustainable--less costly to operate and maintain over a facility's full life cycle and more resilient to near- and long-term change. This companion to Design of Water Resource Recovery Facilities, MOP 8, describes the best practices for evaluating and improving the energy management and sustainability of WRRFs. It includes an assessment of commonly used sustainability frameworks and guidance on the practical application of sustainability concepts at key decisions points during the planning, preliminary design, final design, construction, and operational phases of WRRF capital projects. The strategies, tools, and references that are discussed are globally applicable and will help the reader plan projects that meet today's expectations of facilities with: significantly reduced energy consumption, modern automated equipment with less downtime, lower operation and maintenance costs, resiliency to weather extremes, lower chemical inputs, and marketable products through resource recovery.

This 4th edition of Financing and Charges for Wastewater Systems provides an overview of current industry practices that should be considered for financing and establishing rates and charges for wastewater collection and treatment systems. In addition, this Manual of Practice reflects and is responsive to changes in the industry over the last decade that have occasioned a heightened awareness about wastewater utility financial management and the equitable distribution of cost responsibilities across customer groups or classes. These changes, including tightening environmental regulation and replacement of aging infrastructure, have resulted in a pronounced increase in the cost of wastewater services. At the same time, the portion of costs paid through federal and state assistance programs have declined, challenging the affordability of this vital service. In this context, guidance on wastewater rate-setting practices, and particularly the distribution of costs across user groups, is of critical importance. As individual wastewater utilities address their financial management challenges, it is important that their practices for setting rates and charges be responsive to the unique circumstances and values of the communities they serve. Accordingly, this manual offers industry-accepted guidance in addressing these challenges without prescribing specific methods. In many instances, acceptable methodological alternatives are presented. Financing and Charges for Wastewater Systems is structured to provide the reader with an overview of financing mechanisms for wastewater systems and a framework for development of wastewater rates and charges.

This extensively revised third edition of Activated Sludge and Nutrient Removal reflects industry best practices and the latest advances. It is the primary reference for the operation of the activated sludge process. Expanded content includes an updated process control section with step-by-step examples for calculations, a new laboratory chapter with detailed directions for common process control tests, and an introduction to using modeling for process control. Operators are guided through selecting an appropriate sludge age, calculating wasting rates, optimizing return activated sludge flow, managing clarifier blankets, and setting DO and ORP set points. Advanced concepts in nutrient removal and biological process modeling are also addressed. Practice questions have been added to the end of each chapter to help the reader enhance their understanding of the material and retain information vital to solving performance problems and improving operations. Features & Benefits - Practice questions at the end of each chapter - Covers advanced concepts such as nutrient removal and biological process models - Updated process control section with step-by-step examples for calculations - New laboratory chapter with detailed directions for common process control tests - An introduction to using modeling for process control