With China's accelerated urbanization, a large number of sewage treatment facilities put into operation, the amount of sludge produced rising. According to the Ministry of housing and urban rural development "on the national urban sewage treatment facilities construction and operation in the fourth quarter of 2011 briefing" Tongji, in 2011 the annual total treatment of urban sewage 39313000000 cubic meters, 4572000000 cubic meters more than in 2010. In accordance with the moisture content is 80%, there are nearly 22000000 tons of sludge. Sludge treatment in our country lags behind the development of sewage treatment facilities, sewage treatment plant in the construction stage, often focus on sewage disposal, sludge disposal ignored. At present, most of the sewage treatment plant sludge disposal facilities lack of supporting good stability, harmless sludge disposal rate is only 25.9%. In some economically developed areas even the sludge and events.

　　Harmless sludge in our country has gained attention. In recent years, the national ministries have issued relevant policies and technical standards. The Ministry of environmental protection issued the "urban sewage treatment plant sludge disposal and pollution control technology", the sludge treatment and disposal for the first goal of "reduction" and "harmless" and "stable" and "resources", "resources" is a higher level requirements.

　　According to estimates, "Twelfth Five Year" period, is expected to have more than 30000000 tons of wet sludge produced every year in china. "Twelfth Five" national urban sewage treatment and recycling facilities construction plan "requirements of sludge harmless treatment rate reached 70%. The huge demand of the market will greatly promote the development of the cause of the sludge, will become the focus of China's environmental protection industry sludge disposal.