Experimental Study Of Domestic Sewage In Rural Areas Of The New Treatment Of Subsurface Constructed Wetland

Constructed wetlands as a new sewage treatment technology,It can takeadvantage of absorption, adsorption and microbial substrate conversion and othermeans of sewage plants to explain and absorb nutrients,Rural Sewage effluent thusplay a role in the purification.The experimental design point a a new countryside Sewage of Xinyu City bydrawing in some of the area’s sewage to be processed through subsurface constructedwetlands. This test includes the Best of residence time and hydraulic loadingparameters、 Best combination of plants and fillers， and Nitrogen removalmechanism for subsurface wetland preliminary study.By the test，in the role of the best hydraulic loading0.2m3/(m2·d), influentCOD concentration of180mg/L, the effluent concentration was29.64~35.21mg/L, the removal rate between80.44%~83.68%;Influent concentration of ammonianitrogen was25mg/L, the effluent concentration of6.66~7.38mg/L, the removalrate of70.38%~73.66%;TP influent concentration of2.82mg/L, the effluentconcentration of0.42~0.68mg/L, the removal rate of76.68%~85.54%. Throughexperimental analysis can be drawn, cattails+Limestone+gravel removal of CODis better than reed+Limestone+gravel. Meanwhile, the removal of phosphorus,total gravel+limestone is always better than limestone+sand, can be drawn interms of phosphorus, calcium carbonate has certain advantages.Can be drawn through the test:1、The best hydraulic load test results for0.2m3/(m2·d).2、The best combination of plants and fillers is cattails+Limestone+gravel.3、subsurface constructed wetlands for domestic sewage such as ammonianitrogen, phosphorus etc had a better removal effect.The test was conducted in the south of the summer season, can be an importantexperience in dealing with subsequent accumulation of sewage in rural areas.