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城市污水生物处理过程中SMP与EPS的光谱特性和荷电特征

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杨毅, 马新培, 杨霞霞. 城市污水生物处理过程中SMP与EPS的光谱特性和荷电特征[J]. 环境工程学报, 2017, 11(3): 1395-1401. doi: 10.12030/j.cjee.201512108
引用本文: 杨毅, 马新培, 杨霞霞. 城市污水生物处理过程中SMP与EPS的光谱特性和荷电特征[J]. 环境工程学报, 2017, 11(3): 1395-1401. doi: 10.12030/j.cjee.201512108
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YANG Yi, MA Xinpei, YANG Xiaxia. Spectral characteristics and charged characteristics of SMP and EPS in urban sewage biological treatment[J]. Chinese Journal of Environmental Engineering, 2017, 11(3): 1395-1401. doi: 10.12030/j.cjee.201512108
Citation: YANG Yi, MA Xinpei, YANG Xiaxia. Spectral characteristics and charged characteristics of SMP and EPS in urban sewage biological treatment[J]. Chinese Journal of Environmental Engineering, 2017, 11(3): 1395-1401. doi: 10.12030/j.cjee.201512108
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城市污水生物处理过程中SMP与EPS的光谱特性和荷电特征

  • 1.

    西安建筑科技大学环境与市政工程学院, 西安 710055

  • 基金项目:

    国家自然科学基金资助项目（21407119）

    陕西省教育厅专项科研计划项目（15JK1440）

    西安建筑科技大学基础研究基金项目（JC1307）

  • 中图分类号: X131

Spectral characteristics and charged characteristics of SMP and EPS in urban sewage biological treatment

  • 1.

    School of Environmental & Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China

  • Fund Project:

  • 摘要: 通过研究城市污水生物处理过程中可溶性微生物产物（SMP）和胞外聚合物（EPS）的光谱特性和荷电特征，进一步阐明城市污水生物处理各阶段SMP和EPS的结构特征。结果表明：污水生物处理过程中SMP主要含有低激发波长类色氨酸和类腐殖酸，可能还含有高激发波长类色氨酸和类富里酸，其中类腐殖酸物质在此过程中逐渐被降解。紧密黏附型胞外聚合物（TB-EPS）与松散附着型胞外聚合物（LB-EPS）主要含有类色氨酸、类富里酸和类腐殖酸。此外LB-EPS和TB-EPS还分别含有低激发波长类色氨酸和另一种类腐殖酸（λEx/λEm=（420~425）nm/（470~475）nm）。SMP、LB-EPS和TB-EPS的荧光指数分别为1.78~2.13、1.57~1.68、1.21~1.40，其来源分别主要是生物来源、生物来源和陆源、陆源。且LB-EPS的荧光指数在厌氧处理阶段降低，表明其所含腐殖质的芳香性增强，TB-EPS则相反。三者的Zeta电位值在-11~-24 mV内，且其绝对值随生物处理进行而降低，其中TB-EPS的Zeta电位值变化相对较小。
    Abstract: Spectral and charged characteristics of soluble microbial products(SMP) and extracellular polymeric substances (EPS)were used to clarify the structural characteristics of SMP and EPS during biological wastewater treatment. The results showed that the SMP contained mainly low-excitation-wavelength tryptophan-like and humic-like substances and may also contain high excitation wavelength tryptophan-like and fulvic-like substance. The SMP's humic-like organic matter was degraded to a certain degree. The LB-EPS and TB-EPS contained tryptophan-like,fulvic-like,and humic-like substances,including low-excitation-wavelength tryptophan-like and humic-like substances with λEx/λEm=(420~425)nm/(470~475)nm respectively. The fluorescence index of the SMP,LB-EPS,and TB-EPS was 1.78 to 2.13,1.57 to 1.68,and 1.21 to 1.40,respectively,which indicated that the humic-like components of these substances were derived from a biological source,biological source and terrigenous supply,and terrigenous supply,respectively. The fluorescence index of the LB-EPS and TB-EPS decreased and increased,respectively,during the anaerobic process,which indicated that the aromaticity of the humus of the LB-EPS and TB-EPS increased and decreased respectively. The Zeta potential was between -11 mV and -24 mV for the SMP,LB-EPS,and TB-EPS,decreased during wastewater biological treatment,and changed relatively little for the TB-EPS.
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  • 收稿日期:  2016-01-15
  • 刊出日期:  2017-03-10

城市污水生物处理过程中SMP与EPS的光谱特性和荷电特征

  • 1. 西安建筑科技大学环境与市政工程学院, 西安 710055
  • 收稿日期:  2016-01-15
基金项目:

国家自然科学基金资助项目（21407119）

陕西省教育厅专项科研计划项目（15JK1440）

西安建筑科技大学基础研究基金项目（JC1307）

摘要: 通过研究城市污水生物处理过程中可溶性微生物产物（SMP）和胞外聚合物（EPS）的光谱特性和荷电特征，进一步阐明城市污水生物处理各阶段SMP和EPS的结构特征。结果表明：污水生物处理过程中SMP主要含有低激发波长类色氨酸和类腐殖酸，可能还含有高激发波长类色氨酸和类富里酸，其中类腐殖酸物质在此过程中逐渐被降解。紧密黏附型胞外聚合物（TB-EPS）与松散附着型胞外聚合物（LB-EPS）主要含有类色氨酸、类富里酸和类腐殖酸。此外LB-EPS和TB-EPS还分别含有低激发波长类色氨酸和另一种类腐殖酸（λEx/λEm=（420~425）nm/（470~475）nm）。SMP、LB-EPS和TB-EPS的荧光指数分别为1.78~2.13、1.57~1.68、1.21~1.40，其来源分别主要是生物来源、生物来源和陆源、陆源。且LB-EPS的荧光指数在厌氧处理阶段降低，表明其所含腐殖质的芳香性增强，TB-EPS则相反。三者的Zeta电位值在-11~-24 mV内，且其绝对值随生物处理进行而降低，其中TB-EPS的Zeta电位值变化相对较小。

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