沼气中的有毒气体主要为一氧化碳和硫化氢。硫化氢是一种无色气体,臭鸡蛋味,易溶于水,燃烧时火焰呈蓝色。沼气中硫化氢浓度超过0.02%时,人若吸入可引起头痛、乏力、失明、胃肠道疾病;当浓度超过0.1%时,可很快致人死亡。因此,掌握预防沼气中毒窒息方法对保障生产生活安全具有重要 The main toxic gases in biogas are carbon monoxide and hydrogen sulfide. Hydrogen sulfide is a colorless gas, rotten egg flavor, soluble in water, burning flame was blue. Biogas hydrogen sulfide concentration of more than 0.02%, if inhaled can cause headache, fatigue, blindness, gastrointestinal diseases; when the concentration exceeds 0.1%, can cause rapid death. Therefore, to master the prevention of methane poisoning asphyxia methods to ensure the safety of production and life is important