Study On The Complete Set Technology Of Scattered Community Drainage Natural Regression

Drainage natural regression means reduce pollutants on-site and instantly in sewage produce place, with a nature closed way. It is according to the standard of natural water that returns to nature, and reaching the harmony between human and nature. It is emphasis on "in situ treatments, on-site reuse, realize the water balance and water" which is current water treatment scientists actively advocate. From the scope it is between wastewater treatment and in situ treatment, but from sese in is not only refers to small-scale system, but based on "water return to accordin to nature surface water standard, sewage treatment and landscape on the basis of co dinated", emphasize points as possible quality in situ treatment and recovery of nut ents and form a concept, means the readjust of the community of water and nutrients ecycling processIn view of the big cost of present distributed residential sewage treatment connecting the city network and t special geographic location of the test area. This study research on each quality of a distributed village near the Dong Jiang river. On the base of the analysis and comparison of the characteristics of scattered in sewage processing.we constructed A2/O that process as vertical vertical flow-horizontal flow wetland and gushing deep treatment of filter tank as fast drainage natural regression processing system, and constructs the landscape sketch, will coordinate with landscape drainage. Results show that:(1) With the stabilizing of the whole system of drainage natural returning, COD, NH3-N, TP effluent concentration are respectively:10.5 mg/L,1.78 mg/L,0.34 mg/L. among them. COD concentrations reach the surface water environment quality standards I kind of water standards, NH3-N,TP concentration accord with class V water standards, effluent is clear, good diaphaneity, sensory properties with water and no difference on the water quality, realizing the drainage natural regression reach into the target as the label. (2) Landscape in addition to beautify the experimental plot, but also deeply treat of sewage, by the changing of landscape creating the plunge, and forming a natural scenery of the process of oxygen filling curb harmful algae multiply. Brook corridor and landscape sink perfect aquatic plants system can further cuts continue purification, polluting substances.(3) According to rainfall runoff, using both industry production and water purification function of the base-since purify water, pond system with water purification function using the filtration material composition of the base to rainfall runoff intercepting and cut pollution. The result shows that the COD removal rate reached 72.7%. SS removal rate reached 82.7%.With the research and development of the technology of the Drainage natural regression, it can realize the maximum water balance in the community. It not only adapts to the requirement of sustainable development, but also provides a reference for the future distributed district drainage regression.