摘要
以褐煤、肥煤和无烟煤为研究对象,进行降解时间、粒径和煤阶为因素的降解正交试验及绿孢链霉菌降解固定粒径各煤阶煤的实验;通过COD测定、元素分析和接触角测试,分析比较降解前后溶液有机物含量、煤的组成及亲水性,进而分析绿孢链霉菌对各煤阶煤降解转化的影响因素。结果表明:影响绿孢链霉菌对煤降解效果的主要因素是煤阶;绿孢链霉菌最容易利用降解褐煤生成的有机小分子物质,其次是利用降解肥煤与无烟煤生成的有机小分子物质;各煤阶煤经绿孢链霉菌降解后C元素和N元素含量相对升高,O元素和S元素含量及n(H)∶n(C)和n(O)∶n(C)值均降低;煤样经绿孢链霉菌降解后,褐煤的固液接触角变大,疏水性增强,而肥煤与无烟煤的固液接触角变小,亲水性增强,与各煤阶煤样的固液接触角由大到小的三种溶液依次为蒸馏水、矿井水和KO溶液。
The lignite,fat coal and anthracite were chosen as the research object to carry out the orthogonal tests on the degradation time,particle size and coal rank,as well as the experiment that coals in different coal ranks were biodegraded by Streptomyces viridosporus.The COD measurement,ultimate analysis and contact angle tests were used to analyze the composition of organic matter and coal,and hydrophilicity of coal before and after microbial treatment,and then the influence factors in different coal samples degraded and transformed by Streptomyces viridosporus were analyzed.The results show that the main influence factor in biodegradation efficiency of coal by Streptomyces viridosporus is coal rank.The COD test shows that the small molecule organic substances from the degradation of lignite is more easily used by Streptomyces viridosporus,followed by the small molecule organic substances from the degradation of fat coal and anthracite;after the coal samples biodegraded by Streptomyces viridosporus,the content of carbon and nitrogen elements in the coal samples relatively increases,and the content of oxygen and sulphur elements,as well as n(H)∶n(C)and n(O)∶n(C)decrease.The solid-liquid contact angle and hydrophobicity of the lignite increase,while the solid-liquid contact angles of the fat coal and anthracite decrease,the hydrophilicity increases.The order of solid-liquid contact angle between the three solutions and each coal samples from large to small is water,mine water,KO solution.
作者
赵国俊
郭红玉
ZHAO Guojun;GUO Hongyu(School of Energy Science and Engineering,He’nan Polytechnic University,454003 Jiaozuo,China;Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region,454000 Jiaozuo,China)
出处
《煤炭转化》
CAS
CSCD
北大核心
2020年第3期40-45,共6页
Coal Conversion
基金
国家自然科学基金资助项目(41972178)
河南省科技攻关项目(192102310196,182102310845)。
关键词
煤的生物降解
绿孢链霉菌
正交试验
煤阶
COD
biodegradation of coal
Streptomyces viridosporus
orthogonal test
coal rank
COD
