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底物浓度对玉米秸秆乙醇发酵及残渣甲烷发酵的影响

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冯磊, 王宁, 寇巍, 邵丽杰. 底物浓度对玉米秸秆乙醇发酵及残渣甲烷发酵的影响[J]. 环境工程学报, 2019, 13(1): 186-194. doi: 10.12030/j.cjee.201807058
引用本文: 冯磊, 王宁, 寇巍, 邵丽杰. 底物浓度对玉米秸秆乙醇发酵及残渣甲烷发酵的影响[J]. 环境工程学报, 2019, 13(1): 186-194. doi: 10.12030/j.cjee.201807058
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FENG Lei, WANG Ning, KOU Wei, SHAO Lijie. Effect of substrate concentration on the ethanol fermentation of corn straw and the methane fermentation of its residue[J]. Chinese Journal of Environmental Engineering, 2019, 13(1): 186-194. doi: 10.12030/j.cjee.201807058
Citation: FENG Lei, WANG Ning, KOU Wei, SHAO Lijie. Effect of substrate concentration on the ethanol fermentation of corn straw and the methane fermentation of its residue[J]. Chinese Journal of Environmental Engineering, 2019, 13(1): 186-194. doi: 10.12030/j.cjee.201807058
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底物浓度对玉米秸秆乙醇发酵及残渣甲烷发酵的影响

  • 1.

    沈阳航空航天大学辽宁省清洁能源实验室，沈阳 110136

  • 2.

    辽宁省能源研究所，营口 115003

  • 基金项目:

    辽宁省能源研究所国家重点实验室开放基金(KFKT2014015)

Effect of substrate concentration on the ethanol fermentation of corn straw and the methane fermentation of its residue

  • 1.

    .Liaoning Province Clean Energy Key Laboratory, Shenyang Aerospace University, Shenyang 110136, China

  • 2.

    .Liaoning Institute of Energy Resources, Yingkou 115003, China

  • Fund Project:

  • 摘要: 为研究底物浓度对玉米秸秆乙醇发酵过程中乙醇产率和乙醇发酵剩余残渣厌氧发酵产气特性的影响，在中温(37±0.2) ℃条件下，利用实验室自制小型厌氧发酵装置，在底物浓度为2%、3%、4%和5%下开展周期为50 d的序批式厌氧发酵实验，探索不同底物浓度下玉米秸秆发酵乙醇产率和乙醇发酵剩余残渣厌氧发酵产气特性。结果表明：底物浓度对玉米秸秆乙醇发酵影响显著，当底物浓度为3%时，玉米秸秆厌氧发酵乙醇产量最大，达到39.04 g；底物浓度过低或过高均不适合后期厌氧发酵产甲烷的进行，当底物浓度为3%时，玉米秸秆乙醇发酵残渣表面纤维结构被破坏最明显，残渣厌氧发酵产甲烷实验最早在3 d出现产气峰值，挥发性固体单位甲烷产量为26.82 mL·g-1，并且累积产气量最高，挥发性固体单位累积甲烷产量达到270.01 mL·g-1，玉米秸秆乙醇发酵残渣还有较高的产气潜能；通过质量平衡分析得到，底物浓度为3%时，玉米秸秆生物转化过程中TS和VS去除率最高，分别为59.12%和79.07%。该研究可为玉米秸秆乙醇发酵工程提供参考。
    Abstract: To study the effects of substrate concentration on the ethanol yield in ethanol fermentation of corn straw and the gas production characteristics in anaerobic fermentation of ethanol fermentation residues, a self-made and small-scale anaerobic fermentation device was used to conduct the anaerobic fermentation experiments with sequencing batch mode and 50 day period at medium temperature (37±0.2) °C and substrate concentrations of 2%, 3%, 4% and 5%. The ethanol yield from corn straw ethanol fermentation at different substrate concentrations and the gas production characteristics from following anaerobic fermentation of the residues of aforementioned ethanol fermentation were explored. The results show that the substrate concentration had a significant effect on the ethanol fermentation of corn straw. The maximum ethanol yield from anaerobic fermentation of corn straw was 39.04 g at the substrate concentration of 3%. Too low or high substrate concentrations were not suitable for the subsequent anaerobic fermentation and methane production. At the substrate concentration of 3%, an obvious destruction on the fiber structure of the residue surface after ethanol fermentation of corn straw appeared, and the gas production peak with the corresponding methane production per volatile solid mass was 26.82 mL·g-1 occurred at the third day in the anaerobic fermentation and methane production experiments for the residues. Then the highest cumulative methane production reached 270.01 mL·g-1 volatile solid, a high potential for gas production still remained in the residues from ethanol fermentation of corn straw. Through mass balance analysis, the highest TS and VS removal rates of 59.12% and 79.07% were obtained at the substrate concentration of 3% in the corn straw bioconversion. This study can provide a reference for the ethanol fermentation project of corn straw.
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  • 刊出日期:  2019-01-08

底物浓度对玉米秸秆乙醇发酵及残渣甲烷发酵的影响

  • 1. 沈阳航空航天大学辽宁省清洁能源实验室，沈阳 110136
  • 2. 辽宁省能源研究所，营口 115003
基金项目:

辽宁省能源研究所国家重点实验室开放基金(KFKT2014015)

摘要: 为研究底物浓度对玉米秸秆乙醇发酵过程中乙醇产率和乙醇发酵剩余残渣厌氧发酵产气特性的影响，在中温(37±0.2) ℃条件下，利用实验室自制小型厌氧发酵装置，在底物浓度为2%、3%、4%和5%下开展周期为50 d的序批式厌氧发酵实验，探索不同底物浓度下玉米秸秆发酵乙醇产率和乙醇发酵剩余残渣厌氧发酵产气特性。结果表明：底物浓度对玉米秸秆乙醇发酵影响显著，当底物浓度为3%时，玉米秸秆厌氧发酵乙醇产量最大，达到39.04 g；底物浓度过低或过高均不适合后期厌氧发酵产甲烷的进行，当底物浓度为3%时，玉米秸秆乙醇发酵残渣表面纤维结构被破坏最明显，残渣厌氧发酵产甲烷实验最早在3 d出现产气峰值，挥发性固体单位甲烷产量为26.82 mL·g-1，并且累积产气量最高，挥发性固体单位累积甲烷产量达到270.01 mL·g-1，玉米秸秆乙醇发酵残渣还有较高的产气潜能；通过质量平衡分析得到，底物浓度为3%时，玉米秸秆生物转化过程中TS和VS去除率最高，分别为59.12%和79.07%。该研究可为玉米秸秆乙醇发酵工程提供参考。

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