Abstract:

Because joint household biogas project was carried out not long ago, its profits qualitative assessment research remained little. In order to provide theoretical foundation for its widespread, this paper was based on the data of joint household biogas project of nanyang city in henan province, the comparative analysis was made from 4 aspects, including construction costs, operation and maintenance costs, profits and net present value. Then the author selected the 11 indicators of environmental impact evaluation, the environmental profits was assessed with the help of AHP and SPSS13.0 software. The results showed that the construction cost of each household was less 507 yuan than household biogas digester and service cost per year was more 54.76 yuan. The net present value of the former was 54720.41 yuan and the latter was 4332.11 yuan, the index of scale economy was 115%. So the joint household project had better bright prospects. From 2007 to 2009, the comprehensive scores of environmental profits in wolong district were 6.126, 6.156, 5.816 respectively, the environmental impact of joint household biogas project lay between ‘bigger’ and ‘very’.