With the advancement of the construction of beautiful villages, my country is systematically strengthening the treatment of rural domestic sewage. However, there are many problems in the treatment of exposed areas of rural domestic sewage. Many experts have begun to learn from foreign experience to explore suitable rural sewage treatment methods in the country. The United States pays attention to rural sewage treatment earlier, leading the world in various types of treatment technologies, and provides many methods worth learning from domestically.

Reliable program guarantee

In the early stage of the selection of rural sewage treatment technology in the United States, a detailed investigation will be conducted on the area where it is located, including the quality and quantity of sewage, the location of environmentally sensitive areas, and population density. Secondly, determine the quality of surface water and groundwater, evaluate the degree of easy pollution of the receiving water body and the self-purification ability of the water body, and determine the treatment standard according to the environmental and health risks. Different regions have different treatment requirements for sewage treatment systems. For drinking water sources, nature reserves and other water-sensitive areas, the effluent quality requirements of sewage treatment systems are higher. But for the general area, the effluent water quality requirements are not too harsh, thereby saving money. The US rural sewage treatment project cost estimation has a very complete WAWTTAR program for the feasibility analysis of sewage treatment facility planning or infrastructure investment, which covers various decentralized sewage treatment technologies.

Perfect decentralized sewage treatment management mechanism

In order to maintain the good operation of the decentralized sewage treatment system, the decentralized domestic sewage treatment in the United States has clear laws and regulations.

At the state level, the management requirements for decentralized domestic sewage treatment usually appear in the form of laws and regulations related to related fields. There are many types of laws and regulations, including public safety laws, nuisance behavior laws, environmental protection laws or building regulations. In most states, the jurisdiction of such sewage treatment systems is generally delegated to the county or other local administrative departments. Local authorities can directly implement state regulations or enforce more stringent regulations when enforcing laws.

Highlight the operation and maintenance of sewage treatment systems

The success of a processing system depends largely on the operation and maintenance phase. The management of decentralized sewage treatment facilities in the United States is divided into five modes, namely the owner-owned autonomous mode, maintenance contract mode, operation permission mode, centralized operation mode and centralized operation mode. The simpler system can be maintained by the head of the household through education by the head of the household; the more complex system requires maintenance services from the supplier; the system operated by the management entity is maintained by the management entity. Hierarchical management and maintenance can guarantee the performance of the processing system most efficiently.

Focus on public education

Looking at the reasons for the failure of the sewage treatment system, most of the cases are due to the lack of experience of the head of the household, and the failure to effectively repair and update the faulty treatment system in time, which eventually led to the system collapse. Public education is conducive to raising the awareness and ability of the operation and management personnel related to the processing system to maintain the system. The United States invests more in public education than other countries, which is also the secret of its success.

Although there have been many demonstration projects for decentralized sewage treatment in China, there are still many problems. Rural domestic sewage treatment requires technical selection based on local geological conditions, environmental water quality requirements, and economic conditions, and comprehensive consideration of cost, management and other factors.