Wastewater Treatment Plants

Step-by-step procedures for planning, design, construction and operation: * Health and environment * Process improvements * Stormwater and combined sewer control and treatment * Effluent disposal and reuse * Biosolids disposal and reuse * On-site treatment and disposal of small flows * Wastewater treatment plants should be designed so that the effluent standards and reuse objectives, and biosolids regulations can be met with reasonable ease and cost. The design should incorporate flexibility for dealing with seasonal changes, as well as long-term changes in wastewater quality and future regulations. Good planning and design, therefore, must be based on five major steps: characterization of the raw wastewater quality and effluent, pre-design studies to develop alternative processes and selection of final process train, detailed design of the selected alternative, contraction, and operation and maintenance of the completed facility. Engineers, scientists, and financial analysts must utilize principles from a wide range of disciplines: engineering, chemistry, microbiology, geology, architecture, and economics to carry out the responsibilities of designing a wastewater treatment plant. The objective of this book is to present the technical and nontechnical issues that are most commonly addressed in the planning and design reports for wastewater treatment facilities prepared by practicing engineers. Topics discussed include facility planning, process description, process selection logic, mass balance calculations, design calculations, and concepts for equipment sizing. Theory, design, operation and maintenance, trouble shooting, equipment selection and specifications are integrated for each treatment process. Thus delineation of such information for use by students and practicing engineers is the main purpose of this book.

Sludge Reduction Technologies in Wastewater Treatment Plants is a review of the sludge reduction techniques integrated in wastewater treatment plants with detailed chapters on the most promising and most widespread techniques. The aim of the book is to update the international community on the current status of knowledge and techniques in the field of sludge reduction. It will provide a comprehensive understanding of the following issues in sludge reduction: principles of sludge reduction techniques; process configurations; potential performance; advantages and drawbacks; economics and energy consumption. This book will be essential reading for managers and technical staff of wastewater treatment plants as well as graduate students and post-graduate specialists.

Wastewater treatment plants are large non-linear systems subject to large perturbations in wastewater flow rate, load and composition. Nevertheless these plants have to be operated continuously, meeting stricter and stricter regulations. Many control strategies have been proposed in the literature for improved and more efficient operation of wastewater treatment plants. Unfortunately, their evaluation and comparison – either practical or based on simulation – is difficult. This is partly due to the variability of the influent, to the complexity of the biological and biochemical phenomena and to the large range of time constants (from a few minutes to several days). The lack of standard evaluation criteria is also a tremendous disadvantage. To really enhance the acceptance of innovative control strategies, such an evaluation needs to be based on a rigorous methodology including a simulation model, plant layout, controllers, sensors, performance criteria and test procedures, i.e. a complete benchmarking protocol. This book is a Scientific and Technical Report produced by the IWA Task Group on Benchmarking of Control Strategies for Wastewater Treatment Plants. The goal of the Task Group includes developing models and simulation tools that encompass the most typical unit processes within a wastewater treatment system (primary treatment, activated sludge, sludge treatment, etc.), as well as tools that will enable the evaluation of long-term control strategies and monitoring tasks (i.e. automatic detection of sensor and process faults). Work on these extensions has been carried out by the Task Group during the past five years, and the main results are summarized in Benchmarking of Control Strategies for Wastewater Treatment Plants. Besides a description of the final version of the already well-known Benchmark Simulation Model no. 1 (BSM1), the book includes the Benchmark Simulation Model no. 1 Long-Term (BSM1_LT) – with focus on benchmarking of process monitoring tasks – and the plant-wide Benchmark Simulation Model no. 2 (BSM2). Authors: Krist V. Gernaey, Technical University of Denmark, Lyngby, Denmark, Ulf Jeppsson, Lund University, Sweden, Peter A. Vanrolleghem, Université Laval, Quebec, Canada and John B. Copp, Primodal Inc., Hamilton, Ontario, Canada

This book discusses new and innovative trends and techniques in the removal of toxic and or refractory pollutants through various environmental biotechnological processes from wastewater, both at the laboratory and industrial scale. It focuses primarily on environmentally-friendly technologies which respect the principles of sustainable development, including the advanced trends in remediation through an approach of environmental biotechnological processes from either industrial or sewage wastewater. Features: Examines the fate and occurrence of refractory pollutants in wastewater treatment plants (WWTPs) and the potential approaches for their removal. Highlights advanced remediation procedures involving various microbiological and biochemical processes. Assesses and compares the potential application of numerous existing treatment techniques and introduces new, emerging technologies. Removal of Refractory Pollutants from Wastewater Treatment Plants is suitable for practicing engineers, researchers, water utility managers, and students who seek an excellent introduction and basic knowledge in the principles of environmental bioremediation technologies.

The Handbook of Water and Wastewater Treatment Plant Operations is the first thorough resource manual developed exclusively for water and wastewater plant operators. Now regarded as an industry standard, this fourth edition has been updated throughout, and explains the material in easy-to-understand language. It also provides real-world case studies and operating scenarios, as well as problem-solving practice sets for each scenario. Features: Updates the material to reflect the developments in the field Includes new math operations with solutions, as well as over 250 new sample questions Adds updated coverage of energy conservation measures with applicable case studies Enables users to properly operate water and wastewater plants and suggests troubleshooting procedures for returning a plant to optimum operation levels Prepares operators for licensure exams A complete compilation of water science, treatment information, process control procedures, problem-solving techniques, safety and health information, and administrative and technological trends, this text serves as a resource for professionals working in water and wastewater operations and operators preparing for wastewater licensure exams. It can also be used as a supplemental textbook for undergraduate and graduate students studying environmental science, water science, and environmental engineering.

FROM THE PREFACE Since Federal funding is scarce for massive upgrades, and/or complete new Wastewater Treatment Plants (WWTP) construction, treatment plant operators, superintendents, managers, city councils, boards, etc. must get more creative on funding and coordinating process equipment replacements. Contained herein you will find hints, tactics and procedures aimed at getting the "biggest bang for your public buck." During the 1970s and 1980s, through grants, the Federal Government paid 80% of costs to build new or expanded wastewater treatment plants, pumping stations and collection system renovations. The majority of the grants were to upgrade primary treatment facilities to secondary, and secondary to tertiary treatment status based on Clean Water Act regulations. If your facility was fortunate enough to receive grants, you were in good shape for approximately 20 to 30 years (depending on community growth rates). Since most wastewater treatment facilities are designed to last 20 years, many of the new or expanded facilities in the 70's and 80's are reaching the end of their service life. Some may have reached it sooner due to growth beyond the expected rate, inadequate preventive maintenance, or design inadequacies when built. Now you have identified problems with insufficient aeration capacity, equipment mechanical failure, insufficient pump station capacity, infrastructure deterioration, etc. and need to do something about it before you violate your NPDES permit (if you have not already). This equipment seems very costly to replace because you now must pay 100% opposed to 20% with the grants. Many WWTP are in need of replacement and/or upgraded equipment. The equipment itself is typically about 25% to 50% of the total project cost. This cannot be changed much. However, the remaining 50% to 75% (engineering, installation labor costs and project management) may be whittled down dependent on how active and creative the project coordinator (yourself) wants to be in the process. When EPA funded 80% of project costs in prior years, it was no big deal to have an "open pocketbook" attitude. Those days have changed forever and so have procurement procedures for projects. A Management Guide to Retrofitting Wastewater Treatment Plants is geared towards the managerial and administrative scope of a Lead Operator, Superintendent, Facility Manager type of Wastewater individual. All the junior college courses available, practical operator experience, and certification status will still not offer the opportunity to learn administrative and cost savings techniques (similar to operating a business). But soon, your job may demand these skills. This book is a handy reference for making the task of upgrading/retrofitting wastewater process equipment easier and less costly. It includes ideas for selling upgrade ideas to superiors, pre- and post-project activities, and certain management techniques useful for successful retrofitting or upgrading in past projects. This book should prove helpful to those who find themselves involved in retrofitting their facility, and need assistance on resolving facility problems, including treatment plant operators, superintendents, managers, city council members, and boards. It is also a valuable reference guide for municipal operations individuals who want to retain control of their facilities, but don't quite know how. It was written with the front line operator, superintendent, and manager in mind, in common operator language in order to allow easier understanding. It contains many tips and techniques which operators can implement immediately.