Hunan Village Sewage Treatment Technology Selection Optimization

At present,poor water quality and aquatic ecological damage in some areas,environmental concerns and other issues are very serious.This phenomenon is not well regulated in small towns and rural areas are more prominent,seriously affected and damage to people’s health,detrimental to the sustainable socio-economic development.Along with the new town development,expanding the urban scale,urban sewage treatment will become more and more large scale.In this paper,the lack of certain technical specifications for existing sewage treatment technology of towns and villages,and urban sewage treatment facilities problem does not apply to towns and villages,the sewage treatment process and other provinces due to the different levels of economic development,there is not in Hunan Province applicable so we can not learn from it.Based on current economic level in Hunan province and town sewage treatment and optimization in Hunan province villages and small towns wastewater treatment technology selection and operation and management mode for research.Main content of this paper and the results are as follows:1. Investigation of Hunan province village overall distribution and economic development,urban sewage treatment status,Analysis of small-town and rural sewage water volume,water quality,sewage disposal process,problems and countermeasures.2.According to Hunan Province Villages and small towns Sewage treatment Facility Construction Implementation Leads Then (questionnaire opinion manuscript) recommends the craft as well as the present utilization widespread also the quite stable craft,chooses for types of suitable processes.In four different sizes: 0.2 104m3/d,0.5 104m3/d,1.0104m3/d,2.0 104m3/d under the technical and economic comparison of AHP method in comprehensive evaluation,we recommended technology.Conclusions in the case when the scale is 500-5000m3/d,recommended use IBR technology in processing of scale the 10000m3/d above,recommends the use of CRI technologies.3.According to the specific situation of small towns in Hunan province and discussion on construction project management pattern,Hunan province villages and small towns wastewater treatment up front financing and management major Government-led model,economically less-developed areas for the DBO or BOT model participation of social capital,by government regulation of the PPP model and improvement,further popularized.