The course covers profound theory and application of biological unit operations for municipal and industrial wastewater treatment. Also includes case study on major treatment systems. Provides practical capability to perform design and operation of biological processes, emphasizing a sense of engineering through developing engineers ability to think and offering various kinds of related practices. Practical exercises can improve comprehensive problemsolving capability and executive ability indispensable to engineers as well as provide professional knowledge. Recommended prerequisites: Biology, Environmental System Engineering, Environmental Fluid Mechanics & Laboratory, Water Chemistry & Laboratory, Environmental Microbiology & Laboratory, Planning, design, & management of water and wastewater system, and Wastewater Engineering & Practice 1.