Anaerobic Reactors is the fourth volume in the Biological Wastewater Treatment series. The fundamentals of anaerobic treatment are presented in detail, including its applicability, microbiology, biochemistry and main reactor configurations. Two reactor types are analysed in more detail, namely anaerobic filters and especially UASB (upflow anaerobic sludge blanket) reactors. Particular attention is also devoted to the post-treatment of the effluents from the anaerobic reactors.The book presents in a clear and didactic way the main concepts, working principles, expected removal efficiencies, design criteria, design examples, construction aspects, and operational guidelines for anaerobic reactors.The Biological Wastewater Treatment series is based on the book Biological Wastewater Treatment in Warm Climate Regions and on a highly acclaimed set of best selling textbooks. This international version is comprised by six textbooks giving a state-of-the-art presentation of the science and technology of biological wastewater treatment.Other books in the Biological Wastewater Treatment series:Volume 1: Wastewater characteristics, treatment and disposalVolume 2: Basic principles of wastewater treatmentVolume 3: Waste stabilisation pondsVolume 5: Activated sludge and aerobic biofilm reactorsVolume 6: Sludge treatment and disposal