摘要
对内蒙古神华胜利褐煤(NM)、云南昭通露天煤矿新揭褐煤(YN)和河南义马褐煤(YM)进行了生物强化产气研究,通过检测甲烷体积分数、产甲烷量、气体组分变化探讨微生物产甲烷特征。结果表明:煤层气井产出水经过富集培养,菌群数量明显增长,产甲烷作用明显被激活,产甲烷能力显著增强。经过多次加煤驯化,富集菌群可以适应加煤条件并进行较强的产甲烷作用,为后续实验提供了稳定高产的菌源。三种褐煤均能被微生物降解产甲烷,但产甲烷高峰期出现时间不同,YN实验组有一个峰期,YM实验组有两个峰期,NM实验组有三个峰期。三种褐煤产甲烷效率由高到低的顺序为YM,NM,YN。微生物降解煤产生的生物气主要有CH_4,CO_2和H_2。整个成气过程中CO_2体积分数和CH_4体积分数呈现负相关关系,H_2由于消耗大在体系中几乎没有留存。
The microbial communities were used to stimulate the biogenic gas production of lignite from Inner Mongolia, Yunnan and He’nan. The volume fraction of methane, the methane yield and gas composition were tested to study the characteristics of methane production. The results show that after the enrichment, the number of flora increases significantly, the methanogenesis is activated significantly, and the methanogenesis ability is enhanced significantly. After many times of domestication with coal, enriched flora can adapt to coal conditions, which provide a stable and high-yielding bacterial source. All of three kinds of lignite can be used by microorganisms to produce methane, but the peak periods are different. Experimental group YN has one peak, experimental group YM has two peaks and experimental group NM has three peaks. The order of methane production efficiency from high to low is YM, NM, YN. The component of biogenic gas degraded by microorganisms is mainly methane, carbon dioxide and hydrogen. The volume fraction of carbon dioxide and the volume fraction of methane show a negative correlation during the whole process, and hydrogen is almost not retained due to its high consumption.
作者
赵娜
韩作颖
ZHAO Na;HAN Zuoying(Shanxi Jincheng Anthracite Mining Group Company Limited,048000 Jincheng, China)
出处
《煤炭转化》
CAS
CSCD
北大核心
2019年第3期49-54,共6页
Coal Conversion
基金
山西省煤层气联合研究基金资助项目(2016012009)
关键词
褐煤
生物强化
生物气
驯化
富集培养
煤层气
lignite
bioaugmentation
biogenic gas
domestication
enrichment culture
coalbed methane
