When Gray's textbook Biology of Wastewater first appeared in 1989, it had 828 pages; by 2004 it had reached 1,440 pages. So for this edition he broke it up into smaller, more specialized textbooks. This is a revision of the sections that deal with fixed-film reactors. After an introduction, he covers biofilm formation, percolating (trickling) filters, the organisms and their ecology, rotating biological contactors, submerged fixed-film reactors, nitrogen removal and filters, biological air treatment, and the future for fixed-film systems. Annotation ©2021 Ringgold, Inc., Portland, OR (protoview.com)
Our rivers and lakes are continuously self-purifying thanks to algal and bacterial biofilms that grow over the surface of stones and other debris. This same process has been employed for over a century to treat our municipal and industrial wastewater in specially designed fixed film reactors that maximize this microbial activity by providing ideal growth conditions and unlimited food and oxygen. Fixed film, or attached biofilm, reactors are unique in their ability to treat complex wastewaters and shock loadings; using far less energy than other wastewater treatment processes such as activated sludge, making them a sustainable treatment option. This new book, based on a chapter from the bestseller Biology of Wastewater Treatment, gives an expanded and up-to-date overview of the use of fixed film reactors in wastewater treatment. This volume's content spans from biofilm formation, through traditional trickling filters and rotating biological contactor technology, advanced submerged systems including MBBRs and IFAS, their key role in the treatment of contaminated air, and finally to nitrogen removal employing new microbial pathways such as Anammox. The monograph emphasizes the biological aspects of the processes that will also be of interest to engineers. The book is aimed equally at engineers and scientists at both the undergraduate and postgraduate level, who will find it accessible and easy to understand. It will also be a useful reference for practitioners.
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