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This book contains large amount of information and therefore it may be argued that it is an important reference in the field. Unfortunately, as a textbook for undergraduate teaching, it is terrible. There are several mistakes in the solved examples. Problems at the end of each chapter are not well prepared. Solving the problems at the end of a chapter do not necessarily contribute to a better understanding of the material contained in that chapter. A large number of equations related to the activated sludge process are presented, but they are not well connected. How these equations can be systematically used in design is neither well explained nor well exemplified. Overall, this book is not suitable for self-study without the guidance of an experienced instructor/engineer who also has practical experience in wastewater plant design and operation. Then again, there are very few good books in this field (if any). The field of water and wastewater treatment certainly needs good authors/teachers!
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