| pH值和产甲烷抑制剂对两相耦合系统污泥发酵定向产乙酸的影响 |
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| 引用本文： | 扶郡,刘和,王新华,李秀芬,陈坚. pH值和产甲烷抑制剂对两相耦合系统污泥发酵定向产乙酸的影响[J]. 工业微生物, 2011, 41(6): 58-63. DOI: 10.3969/j.issn.1001-6678.2011.06.012 |
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| 作者姓名： | 扶郡 刘和 王新华 李秀芬 陈坚 |
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| 作者单位： | 1. 江南大学境与土木工程学院环境生物技术研究室,无锡,214122
2. 江南大学境与土木工程学院环境生物技术研究室,无锡,214122;江南大学生物工程学院工业生物技术教育部重点实验室,无锡,214122 |
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| 基金项目： | 江苏省科技支撑计划，哈尔滨工业大学城市水资源与水环境国家重点实验室开放基金 |
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| 摘 要： | 采用产氢产乙酸/同型产乙酸两相耦合工艺对剩余污泥进行了半连续式厌氧发酵,主要研究了pH值和产甲烷抑制剂2-bromoethanesulphonate(BES)对耦合系统定向产乙酸的影响.结果表明:碱性pH(pH=10.0)和添加BES都能促进A相乙酸的积累,提高乙酸的产率,同时碱性pH比添加BES更有利于污泥的水解.当...
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| 关 键 词： | 剩余污泥 厌氧发酵 半连续 甲烷抑制剂 挥发性脂肪酸 乙酸 |
Selective acetate production by a coupling acetogenesis and homoacetogenesis process from sewage sludge:impact of pH and methanogenesis inhibition |
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| FU Jun,LIU He,WANG Xing-hua,LI Ciu-feng,CHEN Jian. Selective acetate production by a coupling acetogenesis and homoacetogenesis process from sewage sludge:impact of pH and methanogenesis inhibition[J]. Industrial Microbiology, 2011, 41(6): 58-63. DOI: 10.3969/j.issn.1001-6678.2011.06.012 |
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| Authors: | FU Jun LIU He WANG Xing-hua LI Ciu-feng CHEN Jian |
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| Affiliation: | 1. Laboratory of Environmental Bioteehnology, School of Environment and Civil Engineering, Wuxi 214122, Jiangsu, China 2. Key Laboratory of Industrial Bioteehnology, Ministry of Education, Jiangnan University, Wuxi 214122, Jiangsu, China) |
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| Abstract: | A novel coupled syntrophic acetogenesis with homoacetogenesis process was used to produce acetate from sewage sludge by semi-continuous anaerobic fermentation. Effects of various pH and methanogenesis inhibition （2-bromoethanesulphonate, BES） on the efficiency of acetate and gas production from excess sludge were investigated. The result showed that the alkaline pH and BES of the A-phase （acetogenesis phase） improve the acetate accumulation. Alkaline pH also more favorable than BES to sludge hydrolysis. With pH control at 10.0 and BES addition, the hydrolysis yield, the yield of acetate and TVFA reached 63.11%, 0.27 g/g VS and 0.40 gig VS, respectively. Alkaline pH or BES addition could remarkably inhibit CH4 production. Alkaline pH was conducived to hydrogen production （up to 16.96 mL/gVS）, but inhibited carbon dioxide production and released, which was not conducive to the accumulation of acetic acid in Hphase. So when these two control methods were used, the contribution of H-phase to total acetate production rates was only 7.5 %, much lower than that at the neutral pH conditions （upto 31.7 % ）. But under neutral pH condition the daily acetate productivity （ 0.99g / d） was much lower than that of the two control methods （3.67 g/d） in the whole system. |
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| Keywords: | sewage sludge anaerobic fermentation semi-continuous methanogenesis inhibition volatile fatty acids （VFAs） acetate |
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