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沼气发酵有三大好处:一是发酵产生的沼气可作燃料解决农村部分能源问题;二是改善城市、乡村环境卫生;三是发酵后的废水、沼渣可作肥料使用。沼渣养分含量比堆沤肥高,保肥保水能力强,改土作用大。沼气发酵肥可作基肥、追肥,也可浸种。发酵液一般作追肥,发酵沼渣作基肥,渣液混合作基肥,也可作追肥。
Biogas fermentation has three major benefits: First, the biogas generated by fermentation can be used as fuel to solve some of the energy problems in rural areas; second is to improve urban and rural environmental health; third is the fermented wastewater, biogas residue can be used as fertilizer. Biogas residue nutrient content than the heap high fat, fertilizer and water retention ability, soil improvement effect. Biogas fermentation can be used as base fertilizer, top dressing, but also soaking. Fermentation broth for top dressing, fermented biogas residue as basal, residue mixed for basal, but also for top dressing.