The reduction of rural retail pig breeding results in the shortage of household biogas raw materials;with the urbanization of rural housing（separation of humans and animals

building septic tanks）

the rural solid waste has become the biggest obstacle to effect rural environment

and rural environment problems restrict rural development.In order to solve the source of biogas raw materials

and improve the environment of rural production and living

and accelerate the rural energy use

environmental protection and ecological development

replacing the septic tanks by feed-liquid separation biogas tanks is proposed through adjusting structure

changing processes and adding control devices.After three year’s practices on rural housing and newrural construction

notable effects are achieved.