The Loess Plateau Area Of Rural Domestic Sewage Treatment Technology Research

With change of rural life and improvement of living standards, especially the growing popularity of water suppliy and latrine, the rural life wastewater is more and more, together with rurallife wastewater collection and treatment facilities of missing or lags behind, rural domestic sewage becomes more and more influence to water,soil and ecological environment. In order to reduce pressure about rural life sewage on the ecological environment, the country is to put forward rural environmental regulation in12th Five-Year planning. Along with the national rural policy implementation, the construction of New Countrysides have increased in the loess plateau and the village layout form gradually evolved original spread out primarily to gather, but it makes that originally rural domestic sewage with little influence water environment has a serious threat to rural or regional water of environmental. Therefore, to find a reasonable rural sewage technology become an important way for improving the rural water environment.In the domestic and foreign existing rural sewage treatment technology foundation, from the loess plateau water shortages, cold climate, topography broken and so on of rural domestic sewage influence factors, choosed infiltration, artificial wetland, stabilization pond, filtering, biogas system, septic tank the suitable for5kinds of the loess plateau in the rural sewage treatment of core technology, demonstrated high load subsurface infiltration compound technology, underground ditch pattern soil treatment process, up-flow anaerobic bio-filter+greenhouse constructed wetlands, unpower rural domestic sewage, low temperature oxidation technology5kinds of loess plateau area for the rural sewage treatment process; ZiChangXian as an example, in the rural sewage treatment on the basis of the current situation, according to the size of the rural residential areas, and gather the degree, the water environment function requirements etc, put forward the ZiChangXian different village type of rural domestic sewage treatment technique, and designed three different types of rural village distribution life sewage treatment scheme.Specific conclusions include:(1) According to ZiChangXian village distribution and the size of the actual situation, the villages divided into manual-intensive nightmares, concentration and scattered combination type, and so on three distribution types and100households,30～100households,10～30households,10households four scale types. According to the difference of the scale of the village, argues that the more than100households in the village the rural sewage treatment, suit to use high load subsurface infiltration compound technology, underground ditch pattern soil treatment process, low temperature oxidation technology;30to100 households in the village of rural domestic sewage treatment, suit to high load subsurface infiltration compound technology, underground ditch pattern soil treatment process, low temperature oxidation technology;10to30households in the village the rural sewage treatment, are suitable for up-flow anaerobic bio-filter+greenhouse constructed wetlands, underground ditch pattern soil treatment process, low temperature oxidation technology; The following10households of the village the rural sewage treatment, are suitable for the family unit handling septic tank or biogas digester.(2) From sewage treatment station siting, process selection, process parameters and the investment estimate and so on, it designed rural domestic sewage treatment scheme about the three typical village of the JieShibao, the ZhaoJiaya and theZhongZhuang.