Effect of oxygen supply at initial stage of anaerobic digestion on biogas production from corn straw

doi:10.11949/j.issn.0438-1157.20141447

CIESC Journal ›› 2015, Vol. 66 ›› Issue (3): 1111-1116.DOI: 10.11949/j.issn.0438-1157.20141447

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Effect of oxygen supply at initial stage of anaerobic digestion on biogas production from corn straw

FU Shanfei^1,2, XU Xiaohui¹, SHI Xiaoshuang¹, ZHAO Yuzhong^1,2, WANG Chuanshui¹, GUO Rongbo¹

1 Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2014-09-24 Revised:2014-11-13 Online:2015-03-05 Published:2015-03-05
Supported by:
supported by the National Natural Science Foundation of China (31101918,21307143), the National High Technology Research and Development Program of China(2012AA052103), the National Science and Technology Support Program(2013BAD22B03), the Chinese Academy of Sciences Key Deployment Project (KGCX2-EW-317) and the Shandong Industrial Engineering Laboratory of Biogas Production and Utilization.

厌氧发酵起始阶段通氧对玉米秸秆产甲烷特性的影响

付善飞^1,2, 许晓晖¹, 师晓爽¹, 赵玉中^1,2, 王传水¹, 郭荣波¹

1 中国科学院青岛生物能源与过程研究所, 山东省沼气工业化生产与利用工程实验室, 山东青岛 266101;
2 中国科学院大学, 北京 100049

通讯作者: 郭荣波
基金资助:
国家自然科学基金项目(31101918,21307143);国家高技术研究发展计划项目(2012AA052103);国家科技支撑计划课题(2013BAD22B03);中国科学院重点部署项目(KGCX2-EW-317);山东省沼气工业化生产与利用工程实验室项目。

Abstract

Abstract:

In this study, the effect of oxygen supply at the initial stage of anaerobic digestion on biogas production from corn straw was investigated in batch-tests. Cumulative methane yields were between 256.6 and 299.8 ml·(g VS)^-1. Maximum methane yield was obtained at oxygen load of 10 ml·(g VS)^-1, which was 8.4% higher than that of the untreated sample. When oxygen loads exceeded 40 ml·(g VS)^-1, slightly negative effect on methane yield was observed. The modified first order equation analysis indicated that oxygen supply treatment at the initial stage could accelerate hydrolysis of substrate. However, excessive oxygen supply during treatment might prolong the lag-phase time of anaerobic digestion. In addition, oxygen supply at the initial stage of anaerobic digestion could increase volatile solids degradation of corn straw.

Key words: anaerobic digestion, oxygen supply, methane, modified first order equation analysis, volatile solids degradation

摘要：

基于厌氧发酵起始阶段的氧供应量控制,研究了厌氧发酵起始阶段通氧对玉米秸秆产甲烷特性的影响。当氧气供应量为10 ml·(g VS)^-1时,甲烷产量达到最大为299.8 ml·(g VS)^-1,相对于不做处理的样品甲烷产量提高了8.4%。但是,氧气供应量的继续提高并没有带来甲烷产量的升高,当氧气供应量大于40 ml·(g VS)^-1时,甲烷产量相对于不做处理的秸秆样品轻微下降。modified first order equation 模型拟合分析表明起始阶段微好氧处理可以加快底物的水解速度,但氧气供应量过大会延长厌氧发酵的延滞时间。另外,经过起始阶段通氧处理,秸秆厌氧发酵的VS降解率也有所提高。

关键词: 厌氧发酵, 通氧, 甲烷, modified first order equation分析, VS降解率

CLC Number:

X705

FU Shanfei, XU Xiaohui, SHI Xiaoshuang, ZHAO Yuzhong, WANG Chuanshui, GUO Rongbo. Effect of oxygen supply at initial stage of anaerobic digestion on biogas production from corn straw[J]. CIESC Journal, 2015, 66(3): 1111-1116.

付善飞, 许晓晖, 师晓爽, 赵玉中, 王传水, 郭荣波. 厌氧发酵起始阶段通氧对玉米秸秆产甲烷特性的影响[J]. 化工学报, 2015, 66(3): 1111-1116.

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Effect of oxygen supply at initial stage of anaerobic digestion on biogas production from corn straw

厌氧发酵起始阶段通氧对玉米秸秆产甲烷特性的影响

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