Biotechnology Second, Completely Revised Edition Edited by H.-J. Rehm and G. Reed in cooperation with A. Puhler and P. Stadler This fully revised and expanded Second Edition takes into account all recent developments in biotechnology. It is extraordinarily broad in scope, up-to-date, carefully structured and well-balanced. "Biotechnology" considers both basic concepts and widely-differing industrial applications: it is a successful synthesis of theory and practice. Any scientist aiming for success in industrial microbiology, biochemistry, molecular biology and chemical engineering must turn to "Biotechnology". Volume 11a: This volume summarizes biological and engineering aspects of wastewater treatment processes for municipalities and industry. It includes the fundamental biological processes for aerobic and anaerobic carbon degradation, nitrogen and phosphorus elimination, mathematic modeling of processes, followed by detailed descriptions of commonly accepted technical solutions for wastewater purification. Topics included in Volume 11a are: Bacterial Metabolism Nitrification and Dentrification Flocs and Biofilms Process Monitoring Municipal, Industrial, Agricultural Wastewater Aerobic Carbon, Nitrogen and Phosphate Removal Activated Sludge Biofilters Metal Ion Removal Anaerobic Processes Future Aspects Major topics of Volumes 11b and c: Soil Decontamination Waste Gas Treatment Solid Waste Treatment Potable Water Preparation