Preliminary study on the model of rural domestic sewage treatment in the middle and high mountain area of the Dadu River Basin:a case study of Hanyuan
According to the characteristics of the wide range of rural domestic sewage points,scat-tered sewage sources,intermittent discharge,and the difficulty of centralized and unified collection into urban sewage treatment plants in the middle and high mountain areas of the Dadu River Basin,this paper takes the rural domestic sewage treatment model of Hanyuan as an example to investigate the treatment effects of its sewage treatment facilities and analyzes the operation and maintenance costs.The results show that the anaerobic+reed wetland combined process in this case can meet the first level standard requirements of the local standard Water Pollutant Discharge Standard for Rural Domestic Sewage Treatment Facilities(DB51/2626-2019)in Sichuan Province.The removal rates of chemical oxygen demand(CODCr),ammonia nitrogen(NH3-N)and total phosphorus(TP)can reach 52.2%-79.6%,46.0%-79.2%and 33.2%-84.9%,respectively,and the annual operation and ma-intenance cost has a significant advantage compared to dynamic facilities.This case can provide reference for the treatment of rural domestic sewage in the middle-high mountain areas of the Dadu River Basin.
Dadu river basinPhragmites australis wetlandrural domestic sewagetreatment mod-elHanyuan
NETL
NSTL
万方数据
