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The effects of divalent copper on performance, extracellular polymeric substances and microbial community of an anoxic-aerobic sequencing batch reactor

机译：二价铜对一种缺氧化批量反应器的性能，细胞外聚合物物质和微生物群落的影响

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摘要

The effects of divalent copper (Cu(II)) on the performance, extracellular polymeric substances (EPS) and microbial community of activated sludge were investigated in an anoxic-aerobic sequencing batch reactor (SBR). The removal efficiencies of chemical oxygen demand (COD) and ammonia nitrogen (NH4+-N) decreased with the increase of influent Cu(II) concentration from 0 to 50 mg L-1. The specific oxygen utilization rate (SOUR), specific ammonium oxidation rate (SAOR), specific nitrite oxidation rate (SNOR), and specific nitrate reduction rate (SNRR) decreased with the increase of influent Cu(II) concentration. The protein (PN) contents in the loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS) increased from 3.67 and 4.73 mg g(-1) VSS to 32.83 and 50.45 mg g(-1) VSS with the increase of influent Cu(II) concentration from 0 to 50 mg L-1, respectively. The polysaccharide (PS) contents in the LB-EPS and TB-EPS increased from 1.44 and 2.68 mg g(-1) VSS to 8.51 and 19.84 mg g(-1) VSS with the increase of influent Cu(II) from 0 to 50 mg L-1, respectively. The three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectra and Fourier transform infrared (FTIR) spectra illustrated that the addition of Cu(II) to the influent had distinct effects on the functional groups of PN and PS in the LB-EPS and TB-EPS. The sludge volume index (SVI) showed a negative correlation with LB-EPS (or TB-EPS) content at different Cu(II) concentrations. Some microorganisms adapting to high Cu(II) concentration became predominant bacteria, while others without Cu(II)-tolerance capacity gradually depleted or weakened with the increase in Cu(II) concentration.
机译：在一种缺氧 - 有氧测序批量反应器（SBR）中，研究了二价铜（Cu（II））对活性污泥的性能，细胞外聚合物物质（EPS）和微生物群落的影响。化学需氧量（COD）和氨氮（NH4 + -N）的去除效率随着0至50mg L-1的流入的Cu（II）浓度的增加而降低。随着流入的Cu（ii）浓度的增加，特定氧氧化速率（酸），特异性氧化率（Saor），特定的亚硝酸盐氧化速率（SNOR）和特定的硝酸盐还原率（SNRR）降低。松散结合的EPS（LB-EP）中的蛋白质（PN）含量和紧密结合的EPS（TB-EP）从3.67和4.73mg（-1）VSS增加到32.83和50.45mg（-1）VSS将流入的Cu（II）浓度从0〜50mg L-1增加。 LB-EPS和TB-EP中的多糖（PS）含量从1.44和2.68mg（-1）增加到8.51和19.84mg g（-1）VSS，随着0到0到0的流动性Cu（II）增加50 mg L-1分别。三维激发发射矩阵（3D-EEM）荧光光谱和傅立叶变换红外（FTIR）光谱示出了对流入的Cu（II）的加入对LB中的PN和PS的官能团具有明显的影响eps和tb-eps。污泥体积指数（SVI）显示出与不同Cu（II）浓度的LB-EPS（或TB-EPS）含量的负相关性。一些适应高Cu（II）浓度的微生物成为主要的细菌，而没有Cu（II）的其他物质 - 随着Cu（II）浓度的增加而逐渐耗尽或削弱。

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  • 来源
    《RSC Advances》 |2015年第39期|共11页
  • 作者

    Wang Sen; Gao Mengchun; Wang Zhichao; She Zonglian; Jin Chunji; Zhao Yangguo; Li Zhiwei;

  • 作者单位

    Ocean Univ China Key Lab Marine Environm &

    Ecol Minist Educ Qingdao 266100 Peoples R China;

    Ocean Univ China Key Lab Marine Environm &

    Ecol Minist Educ Qingdao 266100 Peoples R China;

    Ocean Univ China Key Lab Marine Environm &

    Ecol Minist Educ Qingdao 266100 Peoples R China;

    Ocean Univ China Key Lab Marine Environm &

    Ecol Minist Educ Qingdao 266100 Peoples R China;

    Ocean Univ China Key Lab Marine Environm &

    Ecol Minist Educ Qingdao 266100 Peoples R China;

    Ocean Univ China Key Lab Marine Environm &

    Ecol Minist Educ Qingdao 266100 Peoples R China;

    Ocean Univ China Key Lab Marine Environm &

    Ecol Minist Educ Qingdao 266100 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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