通过搭建小尺寸实验平台,研究了含甲烷氧化菌的超细水雾对含有一定体积分数的一氧化碳、硫化氢、二氧化硫的甲烷气体爆炸的降解与抑制效果,分析了甲烷降解率、甲烷单加氧酶活性的变化以及甲烷爆炸过程的变化状况.单因素实验结果表明单一的CO,H2S或者SO2对含菌超细水雾降解甲烷并无明显影响;多因素实验结果表明φ(CO)∶φ(H2S)∶φ(SO2)=0.1％∶0.003 3％∶0.025％时,有毒混合气体对实验管道内甲烷降解率产生了明显的抑制作用,使得甲烷的降解率下降.有毒气体对甲烷爆炸的火焰外观形态并未产生明显影响,爆炸产生的火焰经历了“指形”—“郁金香形”—“指形”的变化过程,整个过程火焰呈现亮黄色,这与含甲烷氧化菌的超细水雾中含有大量的钠离子有关.%By setting up a small-sized experimental platform,the impacts of the ultra-fine water mist containing methane-oxidizing bacteria on the degradation and explosion of the methane gas with a certain volume fraction of CO,H2S,SO2 are studied,the methane degradation efficiency,the activity change of methane monooxygenase and the change of methane explosion process are analyzed.The single-factor experimental result indicates that single CO,H2S or SO2 has no obvious effects on the methane degradation of the ultra-fine water mist containing methane-oxidizing bacteria.The multi-factor experimental result indicates that the methane degradation efficiency and the activity of MMO come to the lowest when the volume fraction of CO,H2S and SO2 is 0.1 ％,0.003 3％ and 0.025％,respectively.The methane degradation efficiency is decreased obviously.Poisonous gas has no obvious effects on the flame appearance,the flame produced by the explosion experiences the changing process of "finger-type tulip-type"-"finger-type",the flame appears luminous yellow during the whole process,which relates to a mass of sodion of the ultra-fine water mist containing methane-oxidizing bacteria.
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