煤中有機(jī)物的水解菌源性產(chǎn)甲烷特性實(shí)驗(yàn)研究
[Abstract]:The coal bearing strata and adjacent strata of Lianghuai coalfield located in Huaibei Plain are rich in methane content, which is a famous distribution area of high gas, high outburst mine and potential mining area for coalbed methane development in China. Detection of methanogenic bacteria (Methane production bacteria, in deep mine water by bacterial gene sequencing technique has been found to be short for MPB). The water samples used in this experiment are taken from the drainage boreholes in the transport roadway in the middle and sixth mining area of Renlou Coal Mine in Huaibei Coal Field. The final hole layer is located in the limestone layer of the cavernous limestone in the Taiyuan formation of the C31-3 Carboniferous system, which is used as the water sample from the bacteria source. Some macromolecular organic compounds in coal samples were selected as carbon and energy sources in the experimental system to conduct biological methanogenic experiments. The experimental results show that the microbial flora in coal measure groundwater in Huaibei mining area can hydrolyze some organic matter in coal into organic compounds with lower molecular weight, which is reflected in the degradation of these organic substances, propionic acid, ethyl acetate, The content of small organic acids such as ethyl octanoate showed an overall increasing trend during the experiment. Three experimental groups of 2-hexyl-1-decanol, diisooctyl adipate and linoleic acid found methane gas production, which indicated that the organic acids produced by these organic compounds could be used by methanogenic bacteria to produce methane. The feasibility of biologic gas production in coal field was verified, and the basic way of hydrolysis of macromolecular organic matter in coal was shown. The genomic DNA extracted from mine water samples were amplified by amplification and library construction of MCR A gene, and the homology of gene sequence was compared. It is found that the presence of Methanoregula,Methanobacterium,Methanomethylovorans,Methanoregula,Methanolobus,Methanomassiliioccus, in the groundwater of coal measures in Huaibei mining area shows that there are abundant methanogenic bacteria in the groundwater of coal measures in this area, and the discovery of Methanomassiliicoccus ancient bacteria fills up the blank in the record of methanogenic bacteria in natural coal measures.
【學(xué)位授予單位】:合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:Q78;TD841
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