Study Of Rural Domestic Sewage Practical Treatment Technology

Along with the development of agricultural economy and the rapid process of urbanization, rural domestic sewage has become the major source of non-point source pollution in vast rural areas and is one of the important reasons caused water pollution in rural areas. This study relies on the scientific research project of Office of Housing and Urban-Rural of Sichuan Province In order to explore rural domestic sewage treatment technology that suitable to China, especially in the actual situation of Sichuan Province, a large of existing literatures and information related to rural domestic sewage treatment were collected, and the application status of practical treatment method and technologies for rural domestic sewage of Sichuan Province were carried out. While,we designed the pilot test of decentralized wastewater treatment technology that combined with anaerobic and constructed wetland and investigated the operation characteristics and the treatment effect of the portfolio process at the conclusion of previous studies and based on the status of sewage treatment in rural areas of Sichuan Province.This thesis divided Sichuan Province into Chengdu, Panzhihua-Xichang, South of Sichuan, Northeast of Sichuan and Northwestern of Sichuan five rural sewage treatment areas. Basted on a comprehensive research, analysis and summary of domestic and foreign, especially in rural domestic sewage treatment technology and process of Sichuan Province, constructed wetlands and landscape integration processing technology and process, anaerobic filter and oxidation pond and wetland complex processing technique and technology, WSHA anaerobic treatment technology and process, integration of A/O (A2/O) device processing and technology, biological fluidized bed combined with the biological filter bed sewage treatment technology and process, "two-cell" mode processing technology and processes, anaerobic digesters processing technique and technology, farm music "tired of Oxygen and Wetland portfolio " a total of 8 rural domestic sewage treatment technologies that for different areas in Sichuan Province were screened and recommended.This study improved the conventional technology that combined with anaerobic and constructed wetland by adding a red bogs gas mask and hydrophilic elastic filler. The results of pilot test showed that the improved wastewater treatment combined with anaerobicand constructed wetland is very effective in treating rural domestic wastewater,the system could remove 87.44%,78.75%,73.58% and 83.97% of COD, NH3-N, TN and TP respectively. This system is very effective in treating rural domestic wastewater, and it is also material/energy-saving compared with central technical systems, thus, worth popularization and application.