菌种的选育及用于煤炭降解转化试验研究

Experimental Study of the Cultivation and Application of Fungus for Transformation and Biodegradation of Coal

通过选育微生物菌种,筛选出S1,S4,S73种真菌,应用于煤炭转化降解试验,考察了主要影响因素(如菌种、煤样粒度、煤种、有无预处理等)对煤降解作用的影响,结果表明,用3种真菌混合液体培养对煤炭降解效果最好,10 d能降解转化38.13%的义马煤炭;煤样粒度越小,降解转化率越大;变质程度越低和经过预处理的煤越易被微生物降解转化.试验研究中还应用了XRD和FT-IR对煤微生物转化产物进行了测试分析,结果表明其芳香聚合度和分子量有很大程度的降低,官能团含量也发生了变化.

By microoganic Fungus cultivation, three kinds of epiphyte, S1, S4 and S7, were selected for the experiments of coal biodegradation and transformation. The influences of key factors, such as fungus type, size and rank of coal, and pretreatment, on coal degradation were studied. Results show that the best degradation result of 38.13% within 10 days is achieved under co-cultivation of the three kinds of epiphyte for Yima lignite. The finer the coal particle is, the higher the percentage of degradation is, the lower the degree of metamorphism of the coal is, the easier the coal is degraded by the fungus, and the pretreated coal generally tended to be more easily degraded. The degradation products were analysed using XRD and FTIR, and the results show that the degree of the polymerigation of the aromatic nucleus and the molecular weights of products as well are decreased obviously, and remarkable changes also take place in the content of functional groups comparied with the coal.