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电化学氧化与生物法联合降解木质素的影响因素

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崔晓敏, 梁继东, 霍欣, 王述梁. 电化学氧化与生物法联合降解木质素的影响因素[J]. 环境工程学报, 2016, 10(5): 2407-2412. doi: 10.12030/j.cjee.201412150
引用本文: 崔晓敏, 梁继东, 霍欣, 王述梁. 电化学氧化与生物法联合降解木质素的影响因素[J]. 环境工程学报, 2016, 10(5): 2407-2412. doi: 10.12030/j.cjee.201412150
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Cui Xiaomin, Liang Jidong, Huo Xin, Wang Shuliang. Influencing factors of lignin degradation by combination of electrochemical oxidation and biodegradation[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2407-2412. doi: 10.12030/j.cjee.201412150
Citation: Cui Xiaomin, Liang Jidong, Huo Xin, Wang Shuliang. Influencing factors of lignin degradation by combination of electrochemical oxidation and biodegradation[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2407-2412. doi: 10.12030/j.cjee.201412150
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电化学氧化与生物法联合降解木质素的影响因素

  • 1.

    西安交通大学能源与动力工程学院环境科学与工程系, 西安 710049

  • 2.

    北京中科联合环境科技有限公司, 北京 100870

  • 基金项目:

    陕西省科技统筹创新工程项目(2011KTZB03-03-01)

    陕西省自然科学基金资助项目(2015JQ2052)

  • 中图分类号: X592

Influencing factors of lignin degradation by combination of electrochemical oxidation and biodegradation

  • 1.

    Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

  • 2.

    Beijing Zhongke Joint Environmental Technology Co. Ltd., Beijing 100870, China

  • Fund Project:

  • 摘要: 采用高效的电化学氧化技术联合低成本的生物降解技术,进行了木质素的降解探索。考察了电流密度、电量、初始pH和电解质浓度对木质素降解效果的影响,结果表明,电流密度和电量影响显著,而初始pH和电解质浓度的影响较小。经过综合比较,得到电化学与生物联合降解木质素的最佳反应条件为:电流密度为5.0 mA/cm2;电量为20 kC;初始pH为7;电解质浓度为0.1 mol/L。在此条件下,碱木质素和木质素磺酸钠的COD去除率分别达到65.97%和59.31%,表征木质素酚羟基结构的UV280分别降低了65.97%和59.77%,色度去除率分别为74.15%和58.32%。总之,电化学前处理可破坏木质素的关键结构,提高木质素的可生化性,从而促进加快后续生物降解。
    Abstract: Lignin degradation by combining electrochemical oxidation (EO) with biodegradation (BD) was studied. The effects of four factors such as current density, electronic quantity, pH value, and concentration of the supporting electrolyte on lignin degradation were analyzed. The results showed that current density and electronic quantity had much more important impacts on lignin degradation than the pH value and concentration of the supporting electrolyte. Through comparison, the optimum conditions for ligning degradation were confirmed ascurrent intensity of 5.0 mA/cm2, electric quantity of 20 kC, pH of 7, and concentration of supporting electrolyte of 0.1 mol/L. For kraft lignin and lignosulfonate degradation, COD removal rates of 65.97% and 59.31%, UV280 reduction of 65.97% and 59.77%, and color removal efficiencies of 74.15% and 58.32% were obtained. It was confirmed that EO could destroy the recalcitrant bonding structure of lignin to produce biodegradable intermediates that could be removed easily by further bioprocesses.
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出版历程
  • 收稿日期:  2015-01-25
  • 刊出日期:  2016-06-03

电化学氧化与生物法联合降解木质素的影响因素

  • 1. 西安交通大学能源与动力工程学院环境科学与工程系, 西安 710049
  • 2. 北京中科联合环境科技有限公司, 北京 100870
  • 收稿日期:  2015-01-25
基金项目:

陕西省科技统筹创新工程项目(2011KTZB03-03-01)

陕西省自然科学基金资助项目(2015JQ2052)

摘要: 采用高效的电化学氧化技术联合低成本的生物降解技术,进行了木质素的降解探索。考察了电流密度、电量、初始pH和电解质浓度对木质素降解效果的影响,结果表明,电流密度和电量影响显著,而初始pH和电解质浓度的影响较小。经过综合比较,得到电化学与生物联合降解木质素的最佳反应条件为:电流密度为5.0 mA/cm2;电量为20 kC;初始pH为7;电解质浓度为0.1 mol/L。在此条件下,碱木质素和木质素磺酸钠的COD去除率分别达到65.97%和59.31%,表征木质素酚羟基结构的UV280分别降低了65.97%和59.77%,色度去除率分别为74.15%和58.32%。总之,电化学前处理可破坏木质素的关键结构,提高木质素的可生化性,从而促进加快后续生物降解。

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