There are 1,627 county towns and 41,636 townships in China. As of 2013, 25% of the county towns in China have no sewage treatment plants, and the coverage rate of township sewage treatment plants is less than 20%. With the construction of new rural areas in China, urbanization The development of rural and urban water issues has become increasingly prominent as the development of public service facilities has increased.

According to the data released by the US EPA, as of 2009, there are only 21,500 public sewage treatment plants in the United States. The scale of sewage treatment plants is generally small and scattered. If compared with the US sewage treatment, compare the actual situation in China. In the future, China will also build a township sewage treatment plant with a relatively small scale in urban construction and adapt to the actual situation in China.

During the 11th Five-Year Plan period, China's sewage treatment facilities have undergone a great leap forward development. Various large and medium-sized cities have built corresponding sewage treatment plants. Most of the city's sewage has been treated, but there are still some urban sewage treatment facilities. Can not fully meet the development of society. In particular, most of China's cities and towns have not developed sewage treatment. In the future, there is still a lot of sewage treatment space in China.

Wang Hongchen, deputy dean of the School of Environment at Renmin University of China, said. During the 12th Five-Year Plan period, China will build 40,000 small-scale, decentralized sewage treatment facilities, setting a construction target of 45.69 million cubic meters per day. The new sewage capacity requires a large amount of sewage treatment chemicals, and PAM is sewage treatment. Preferred.