The integrated wastewater treatment equipment of biofilm process developed by our company is a kind of fixed membrane process, which utilizes the aerobic biological treatment technology of wastewater. It is the artificial and intensified process of soil self purification of wastewater, and mainly removes the dissolved and colloidal organic pollutants in wastewater. The bioreactor in the typical process of the bioflm process can be a bioflter, a biological rotary table, an aerated biofilter or an anaerobic biofilter, The first three are used in aerobic biological treatment process, and the latter is used in anaerobic process. The earliest biofilm bioreactors are intermittent sand filter and contact fiter (a pool full of debris).Their operation is intermittent. Filtration leisure or water filing contact water discharging leisure constitute a work cycle.They are the development of sewage irrigation and are based on the phenomenon of soil self purifcation.