Why can the development of biogas bring huge economic, ecological and social benefits?

(1) Economic benefits Generally speaking, building an 8 m3 biogas digester can produce 350-400m3 gas per year under normal gas production conditions, which can meet the daily cooking and lighting needs of 3-4 people. It can save 2000 kg of coal, about 300 kwh of electricity, fuel 780 yuan and electricity 200 yuan. In greenhouse vegetable production, increasing the application of biogas lamp carbon dioxide gas fertilizer can increase the yield of cucumber by 20% ~ 30%, celery by 65,438+08% ~ 25% and tomato by 65,438+06% ~ 20%. Using biogas to dry grain, agricultural and sideline products, using biogas to store grain to prevent insects and using biogas to keep fruits fresh can achieve the purpose of saving costs and achieving good results. At the same time, the biogas slurry and biogas residue provided in one year are equivalent to 50 kilograms of ammonium sulfate and 40 kilograms of calcium superphosphate. The application of biogas fertilizer can increase the yield of all food crops, cash crops and fruit trees by about 8% ~ 35%, and the pigs can be slaughtered 20 ~ 30 days in advance by feeding biogas slurry, and the average cost per pig can be saved by about 1.30 yuan. Fish culture with biogas slurry and edible fungi cultivation with biogas residue can increase production and income by 65,438+0% ~ 35%. (2) Ecological Benefits The development and utilization of biogas can alleviate the situation of farmers burning firewood, grass and coal, protect and restore forest vegetation, and promote the improvement of ecological environment. At the same time, after long-term application of biogas fertilizer, the contents of soil organic matter, nitrogen, phosphorus, potassium and other nutrient elements increased, which significantly improved soil fertility and crop resistance to pests and diseases, and promoted agricultural production and efficiency. (3) Social Benefits The popularization and application of biogas greatly saves various energy materials and a large number of conventional energy sources such as coal, oil and electricity, relieves the shortage of energy consumption in urban and rural areas, avoids various eye diseases and respiratory diseases caused by smoky fires every day, protects the health of farmers, especially liberates rural women from the suffering of smoky fires, saves a lot of time to develop sideline businesses, and realizes the harmonious development between nature and people.