There is a barrier between reservoir and atmospheric water of basin margin forming reducing environment with low sulphate which is favorable to methane bacteria activity.

储层与盆地边缘大气水渗滤带隔绝，形成了低硫酸盐的还原环境，有利于甲烷菌活动。

youdao

The organic material will be anaerobic decomposed by methane bacteria when municipal solid waste (MSW) is processing in landfills, thus methane will be emitted to the atmosphere.

城市固体废弃物(MSW)在填埋处理时，甲烷菌将使废弃物中的有机物质发生厌氧分解，从而会有甲烷排放到大气中。

youdao

Other ancient bacteria consumed methane, greatly reducing its amount in the atmosphere.

其他古代细菌消耗甲烷，大大减少了甲烷在大气中的含量。

youdao

First, the hog waste is placed in an anaerobic digester, which contains bacteria that consume the manure and release methane gas.

FORBES: Written by John Platt

Methane is the final product of the anaerobic metabolic pathway of clostridium bacteria breaking down organic matter in the absence of oxygen, primarily cellulose.

FORBES: How Could You Possibly Have A Problem With Diesel-Based Gas Fracking?

Anaerobic microbes--bacteria that live without oxygen--were generating the methane.

FORBES: Magazine Article