吉林省辉南县金川镇青年农民栗朝祥成功地运用了庭院经济新模式——四位一体生态工程,获得了显著的经济效益。四位一体生态工程(即蔬菜大棚、保温猪舍、卫生厕所、沼气发酵池四位一体)。沼气发酵池建在蔬菜大棚内一侧,卫生厕所建在沼气发酵池上。沼气发酵池的一个进料 Li Chuxiang, a young farmer from Jinchuan Town, Huinan County, Jilin Province, successfully applied the new mode of courtyard economy - the “four in one” ecological project and obtained remarkable economic benefits. Four in one ecological engineering (that is, greenhouses, insulation pigs, sanitary latrines, biogas digesters four in one). Biogas fermentation tank built on the side of the greenhouse, sanitary toilets built in biogas fermentation tank. A feed to the biogas fermentation tank