Application of the grey system model to development of biogas in the city of Huixian

As a renewable energy, biogas is not only an important part of the development of rural new energy, but also an important aspect of sustainable development in China. In this paper, with the date from 2003 to 2009, we use the method of grey correlation model to analysis the influence factors of rural household biogas in the city of Huixian. The results point out: the factors that affect rural household biogas, from big to small, are numbers of technicians, rural per capita net income, construction cost of biogas digesters, amount of livestock manure, and subsidy. Besides we make the GM(1, 1) model and forecast the development trend, then give some correlation suggestions for rural biogas in the city of Huixian.