| 厌氧互营苯甲酸降解菌 Sporotomaculum syntrophicum对玉米秸秆沼气发酵的生物强化作用 |
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| 引用本文： | 朱心宇,张洁,孙晓娇,陈光辉,王晓霞,张培玉,邱艳玲.厌氧互营苯甲酸降解菌 Sporotomaculum syntrophicum对玉米秸秆沼气发酵的生物强化作用[J].环境工程,2022,40(5):75-81. |
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| 作者姓名： | 朱心宇 张洁 孙晓娇 陈光辉 王晓霞 张培玉 邱艳玲 |
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| 作者单位： | 1. 青岛大学 环境科学与工程学院, 山东 青岛 266071; |
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| 基金项目： | 国家自然科学基金项目(51878363)；;山东省自然科学基金项目(ZR2019MEE028)； |
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| 摘 要： | 木质素的有效降解是提高秸秆等木质纤维素原料沼气发酵效率的有效途径。木质素很难被厌氧微生物分解利用,然而有研究表明木质素可以经由苯甲酸、苯酚等芳香族化合物被微生物分解利用。采用批次试验探究厌氧苯甲酸降解菌Sporotomaculum syntrophicum FB对秸秆沼气发酵的影响。强化菌株S.syntrophicum接种比例的结果表明,接种比例为5%、10%和20%时,甲烷产量分别为252.2,244.9,234.8 mL/g TS,比对照组提高了20.5%、17.0%和12.2%,TS去除率提高了2.9%、3.1%和3.4%。投加5%~20% S.syntrophicum后的玉米秸秆中纤维素、半纤维素、木质素的去除率,比对照组提高了12%~13%,3%~5%和38%~46%。进一步试验结果显示,添加S.syntrophicum使甲基纤维素、木聚糖和碱木质素(纤维素、半纤维素和木质素的模式物)的甲烷产量分别提高了15.7%、11.4%和7.8%。
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| 关 键 词： | 生物强化 玉米秸秆 沼气发酵 木质素 Sporotomaculum syntrophicum |
| 收稿时间： | 2021-09-04 |
BIOAUGMENTATION OF CORN STALKS FERMENTATION BY ANAEROBIC BENZOATE-DEGRADING BACTERIUM SPOROTOMACULUM SYNTROPHICUM |
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| Affiliation: | 1. School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China;2. Linyi Vocational College of Science and Technology, Linyi 276000, China |
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| Abstract: | The degradation of lignin is an effective way to improve the biogas fermentation efficiency of lignocellulosic materials, such as straw. For anaerobic microorganisms, lignin is difficult to use, however, recent studies indicated that lignin can be decomposed and utilized by microorganisms through aromatic compounds such as benzoate and phenol. The effect of bioaugmentation with a benzoate-degrading bacterium Sporotomaculum syntrophicum strain FB on the anaerobic corn stalk fermentation was evaluated by batch experiments. The results showed that when the inoculation ratio of S. syntrophicum was 5%, 10%, and 20%, the methane yields were 252.2, 244.9, 234.8 mL/g TS respectively, increased by 20.5%, 17.0%, 12.2% comparing with the control. TS removal rates increased by 2.9%, 3.1%, and 3.4%, respectively. The removal rates of cellulose, hemicellulose and lignin increased by 12%~13%, 3%~5% and 38%~46%, respectively, with the addition of 5%~20% S. syntrophicum. The further experiment verified that the addition of S. syntrophicum could improve the methane yields of methyl cellulose, xylan, and alkali lignin(models for cellulose, hemicelluloses, and lignin, respectively) by 15.7%, 11.4%, 7.8%. |
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