Wastewater Treatment Concepts And Design Approach: A Book Review
Wastewater treatment is a vital process that ensures the protection of public health and the environment from the adverse effects of wastewater. Wastewater treatment involves various physical, chemical and biological processes that remove pollutants and pathogens from wastewater before it is discharged or reused. The design of wastewater treatment plants requires a thorough understanding of the principles of operation and the criteria for efficiency and reliability.
One of the books that provides a comprehensive account of the wastewater treatment concepts and design approach is \"Wastewater Treatment: Concepts and Design Approach\" by G. L. Karia and R.A. Christian. This book, published by PHI Learning Pvt. Ltd. in 2013, is intended for the undergraduate students of Civil and Environmental Engineering as well as for the practising professionals involved in the design of wastewater treatment plants.
The book covers the basic concepts of wastewater and its treatment, the general procedure for design calculations, the reactions and reactors used in wastewater treatment, and the design of various treatment units such as preliminary, primary, secondary biological, sludge and disinfection units. The book also describes the most common types of reactors used for physical operations and biological processes in wastewater treatment plants, such as sedimentation tanks, screens, grit chambers, clarifiers, aerated lagoons, activated sludge process, trickling filters, anaerobic digesters, UASB reactors and chlorination units.
The book provides several examples supported by graphs and sketches to highlight the various design concepts of wastewater treatment units. It also encapsulates significant theoretical and computational information, and useful design hints in Note and Tip boxes. The book includes well-graded practice exercises to help students develop the skills in designing treatment plants. The book also includes a new chapter on âDisinfection of Wastewaterâ in its second edition.
The book is written in a clear and concise manner, with a logical flow of topics and a consistent notation system. The book is well-organized and easy to follow, with a detailed table of contents, an index and references at the end. The book is also updated with the latest developments and standards in the field of wastewater treatment.
The book is a valuable resource for anyone who wants to learn more about the wastewater treatment concepts and design approach. It is a useful reference for students, teachers, engineers and researchers who are interested in or involved in the design of wastewater treatment plants.
The book is divided into 14 chapters, each covering a specific aspect of wastewater treatment. The first chapter introduces the wastewater and its treatment concepts, such as the sources and characteristics of wastewater, the objectives and levels of treatment, the effluent standards and the environmental impacts of wastewater. The second chapter discusses the basic design considerations for wastewater treatment plants, such as the population and wastewater flow projections, the peak factors, the design period and the reliability and safety factors.
The third chapter explains the general procedure for design calculations of wastewater treatment units, such as the mass balance, the hydraulic loading, the organic loading and the sludge production. The fourth chapter describes the reactions and reactors used in wastewater treatment, such as the types of reactions, the reaction kinetics, the reactor models and the reactor performance. The fifth chapter deals with the design of preliminary treatment units, such as the screens, the comminutors, the grit chambers and the flow measurement devices.
The sixth chapter covers the design of primary treatment units, such as the sedimentation tanks, the primary clarifiers and the chemical coagulation and flocculation units. The seventh chapter focuses on the biological treatment of wastewater using aerobic processes, such as the aerobic decomposition, the oxygen transfer and demand, and the aeration systems. The eighth chapter presents the design of secondary biological treatment units using suspended growth process, such as the activated sludge process, the extended aeration process and the oxidation ditch. 248dff8e21