In an article on the prospects of water protection and sewage treatment in Guangzhou Province, Guangzhou Municipal Environmental Protection Bureau deputy director Xie MING came up with the following figures: Guangzhou has a resident population of 18 million in its major cities, resulting in 4.65 million tons of sewage per day. In Guangzhou City, Guangzhou Co., Ltd. is the largest water sewage treatment enterprises with eight sewage treatment systems and a daily sewage treatment capacity of 2.98 million tons, with 1421 km of a pipeline network, responsible for the whole Guangzhou province, > 60% of the overall sewage processing tasks. However, the pipe network does not cover remote and rural areas with 1205 villages. 1184 among them are in a rural sewerage scheme, but only 471 have completed sewer construction. Rural sewage discharge is 2,300 tons / day, with operating costs from 0.8 to 1.0 yuan / ton. The annual management and maintenance costs will reach 6.7 billion to 84 billion, costs to be born by county and township governments. As a consequence, eco-dialysis” technologies with the use of surface-modified polymers as matrix material are now being discussed. Biodegradtion is along the principles of ecology, simulating natural rivers and their biodiversity. If the standard sewage emission is 0.2 tons / person / day, total daily sewage discharge of 500 people is 100 tons / day, ie 3000 tons / month, which would lead to operating costs of 0.067 yuan/ton, much lower than by sewer pipes and sewage treatment plants.”

China Bio news release, March 11, 2015