Study On Rural Sewage Treatment Technology In Alpine Region

With the development of our socity, the number of squat toilet become less and less. Followed by the sharp rise of the flush toilets, in addition to the green fertilizer be replaced by chemical fertilizer,the number of fecal sewage has soared. Moreover, there are not enough sewage disposal facilities and drainage pipelines in rural area, only use septic tank to treat sewage commonly.Some villages, rural effluent was discharged directly into the river,which can cause the environmental pollution.This paper based on the exiting sewage treatment to find a rural domestic sewage treatment in alpine areas which have the feature of good water treatment,low small investment and convenient in management. Compared and analyzed many treatment technologies draws the conclusion that subsurface wastewater infiltration system meats requirements.After refering to various kinds of papers about subsurface wastewater infiltration system,an experiments system was designed.Using Yushu county Baji village as an example, designed a tippical ptocess about rural domestic sewage.Research have shown that①every index of the system is good in treatment after matuaity, whitch can achieve the expected effect.②With the increasing of hydraulic load, removal rate of the system to organic, total nitrogen and ammonium reducing. The correlation between hydraulic loading and removal rate of the system to total phosphorus and suspended substance is week.③The system have good stability and shock resistance ability.④The processing effort of total phosphorus and suspended substance in the system are little affected by temperature.⑤Temperature palyed a crucial role and impact role in the processing effort of COD, total nitrogen and ammonium. When the temperatures are colder, the lower the processing effect is to get.