Water pollution treatment literature review in EnglishApplication of multi-soil-layer system MSL in rural wastewater treatment Abstractwith the continuous improvement of living in rural farmers the wa

alized technology can effectively treat rural sewage and reduce environmental pollution, and its investment cost and operating cost are lower than traditional centralized sewage treatment systems.

2. Multi-soil-layering system technology

Multi-soil-layering system (MSL) technology is a decentralized sewage treatment system that uses natural materials such as gravel, sand, and soil to purify sewage. The system is composed of several layers, including an upper layer of vegetation, a middle layer of soil and gravel, and a lower layer of drainage pipes. The sewage flows from the upper layer down through the middle layer, where the soil and gravel act as a natural filter to remove pollutants, and then flows into the lower layer of drainage pipes for discharge.

The MSL system has several advantages over traditional centralized sewage treatment systems. Firstly, the system is simple to construct and maintain, and requires less investment and operating costs. Secondly, the system can be adapted to local conditions, such as different soil types and climatic conditions. Thirdly, the system is environmentally friendly, as it uses natural materials and processes to purify sewage.

3. Application of MSL in rural sewage treatment

The MSL system has been successfully applied in rural sewage treatment in many developing countries. For example, in China, the MSL system has been used to treat sewage from small rural communities and livestock farms. In India, the MSL system has been used to treat sewage from rural schools and health centers. In Africa, the MSL system has been used to treat sewage from rural villages.

4. Conclusion

The MSL system is a promising technology for rural sewage treatment. It is a decentralized system that uses natural materials and processes to purify sewage, and has several advantages over traditional centralized sewage treatment systems. The MSL system has been successfully applied in many developing countries, and can provide a new way for rural sewage treatment