Demonstration Research on Treatment of Domestic Sewage From Tourism-Oriented Rural Towns and Villages With Multi-Soil-Layering (MSL) System

The rapid development of rural tourism has resulted in water pollution in the countryside.Rural tourist spots in Anji County,Zhejing Province are mostly located in remote hilly areas,where no large piece of land for construction of wastewater treatment facilities is available.To solve this problem,a "multi-soil-layering(MSL) technology" featuring low investment,low operation cost,simple operation and management,and small land occupatio was introduced.The treatment capacity of the MSL system is abort 60m³·d^-1.After half a year of stable operation,monitoring shows that the effluent of the system is 43.8,5.1,3.1,0.6 and 7.0 m³·d^-1 in average concentration of COD,TN,NH₄⁺-N,TP and SS,indicating that their average removal rate being 82.7%,92.2%,94.1%,89.4% and 97.1%,respectively.The quality of its effluent may be stably kept up to the Criteria of Grade I of the "Standard fro Discharge of Pollutants From Urban Sewage Treatment Facilities"(GB 18918-2002).