As the demand for wastewater treatment, recycling and reuse technology increases, membrane separation bioreactors will play a significant role. This publication provides comprehensive and state-of-the-art coverage of membrane bioreactors MBR for wastewater treatment, dealing with both municipal and industrial applications. Coverage of the three types of MBR''s available with an easy to understand coverage of the science behind the technology. The authors provide a complete discussion of MBR design features, operation, applications, advantages, limitations, performance, current research activities and cost.