煤制生物甲烷实验方案设计及优选  

Experimental design schemes for bio-methane production from coal and optimal selection

作　　者：苏现波[1] 吴昱[2] 夏大平[1] 陈鑫[1] 

机构地区：[1]河南理工大学能源科学与工程学院 [2]河南理工大学资源环境学院

出　　处：《天然气工业》2013年第5期132-136,共5页Natural Gas Industry

基　　金：国家自然科学基金"煤层生物甲烷的形成机理研究"(编号:40972109)

摘　　要：煤制生物甲烷是一个复杂的生物化学过程,其实验方案的优劣决定着煤转化程度的高低。为筛选出实验室模拟生物甲烷生成的最佳方案,以河南省鹤壁矿区的瘦煤为实验对象,以不同外加菌种的联合培养为变量条件,共设计了5组方案进行模拟生物甲烷产出实验。以煤微晶结构为降解程度指标、类木质素消耗量和pH值为大分子物质转化程度指标、甲烷、二氧化碳的产出浓度及产率为产气指标,根据各性能指标与其作用程度的关系,采用模糊数学评价法对实验方案进行了优选评价。评价结果表明:①未进行菌种富集的方案一效果最差,综合评分为49.43;②对菌种源进行菌种富集的方案二和方案三,以及在方案二基础上添加白腐真菌的方案四,其综合评价为一般,得分分别为68.26、78.89和71.37;③而采用产甲烷菌—白腐真菌联合培养的方案五为最优化方案,综合评分为90.63。Bio-methane production from coal is a complex biochemical process. The pros arid cons of its experimental program deter mine the conversion rate of the coal. In view of this, a case study was made of lean coal in the Hebi mining field, Henan province, China. With the joint training of different cultures as variables, 5 schemes were designed for simulating the process of bio-methane production from coal. In the experiments, we made microcrystalline structure of coal as a degradation index; the class lignin con sumption and pH value as conversion metrics of macromolecules; as well as the concentration and content of methane and CO2 as the indicators of gas production. According to each index and its role relationship, the 5 schemes were assessed by using the fuzzy mathematical evaluation method. The evaluation results show that a. scheme Ⅰ is the worst one without the enrichment of cultures and its score is 49.43; b. schemes Ⅱ, Ⅲ and Ⅳ （white rot fungi added based on scheme Ⅱ） are all better ones with the score of 68.26, 78.89 and 71.37 respectively; and c. scheme V with the synergistic training of the methanogen and white rot fungi is the best one with the score of 90.63.

关 键 词：煤制生物甲烷 评价指标 瘦煤 外加菌种 联合培养 模糊数学评价 方案优选 实验室模拟 

分 类 号：TQ221.11[化学工程—有机化工]