Analysis of rural domestic sewage treatment in Guizhou

Based on the data statistics and field investigation of domestic sewage treatment in 1414 township-level units and 17664 administrative villages in Guizhou Province, this paper summarizes and analyzes the coverage of administrative villages of sewage treatment facilities in Guizhou Province and the current treatment technology model. About 13.24% of the domestic sewage in administrative villages in the whole province has been centralized or partially centralized, and the degree of sewage treatment is relatively low. Among them, Zunyi and Guiyang are relatively high, with the coverage rates of 30.7% and 27.4% respectively. However, Bijie is the lowest with the largest rural population, which is 7.4%. In addition, through the investigation of rural sewage treatment technology mode in Guizhou Province, it can be concluded that in areas with relatively concentrated villages, centralized treatment technologies for rural domestic sewage are commonly adopted, including constructed wetlands and integrated sewage treatment equipment, and a decentralized sewage treatment system is often adopted for single households. In the selection of rural domestic sewage treatment technology scheme, the principles of simple process, low infrastructure cost, easy maintenance, and pollution-free and good removal effect of rural domestic sewage are taken as far as possible.