Shortage of water resource is an important restricting-factor of the economy and society development in China, and a great deal of municipal sewage directly draining into water body without any treatment or with little treatment is a main cause why the quality of water environment has been deteriorating as a whole. So it is urgent to research and develop simple、 high-efficient、 low-consumptive treatment techniques for municipal sewage correspond to the situation of China. Aerated biofilter is one of the imp...