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首页> 外文期刊>Environmental Science & Technology >Fate of Alkylphenolic Compounds during Activated Sludge Treatment: Impact of Loading and Organic Composition
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Fate of Alkylphenolic Compounds during Activated Sludge Treatment: Impact of Loading and Organic Composition

机译：活性污泥处理过程中烷基酚类化合物的命运：负载和有机成分的影响

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摘要

The impact of loading and organic composition on the fate of alkylphenolic compounds in the activated sludge plant (ASP) has been studied. Three ASP designs comprising carbonaceous, carbonaceousitrification, and carbonaceousitrification/ denitrificatjon treatment were examined to demonstrate the impact of increasing levels of process complexity and to incorporate a spectrum of loading conditions. Based on mass balance, overall biodegradation efficiencies for nonylphenol ethoxylates (NPEOs), short chain carboxylates (NP,-3EC) and nonylphenol (NP) were 37%, 59%, and 27% for the carbonaceous, carbonaceousitrification, and carbonaceousitrification/ denitrification ASP, respectively. The presence of a rich community of ammonia oxidizing bacteria does not necessarily facilitate effective alkylphenolic compound degradation. However, a clear correlation between alkylphenolic compound loading and long chain ethoxylate compound biodegradation was determined at the three ASPs, indicating that at higher initial alkylphenolic compound concentrations (or load), greater ethoxylate biotransformation can occur. In addition, the impact of settled sewage organic composition on alkylphenolic compound removal was evaluated. A correlation between the ratio of chemical oxygen demand (COD) to alkylphenolic compound concentration and biomass activity was determined, demonstrating the inhibiting effect of bulk organic matter on alkylphenol polyethoxylate transformation activity. At all three ASPs the biodegradation pathway proposed involves the preferential biodegradation of the amphiphilic ethoxylated compounds, after which the preferential attack of the lipophilic akylphenol moiety occurs. The extent of ethoxylate biodegradation is driven by the initial alkylphenolic compound concentration and the proportion of COD constituted by the alkylphenol polyethoxylates (APEOs) and their metabolites relative to the bulk organic concentration of the sewage composed of proteins, acids, fats, and polysaccharides. Secondary effluents from this study are characterized by low bulk organic concentrations and comparatively high micropollutant concentrations. Based on the biodegradation mechanism proposed in this study, application of high rate tertiary biological treatment processes to secondary effluents characterized by low bulk organic concentrations and comparatively high APEO concentrations is predicted to provide a sustainable solution to micropollutant removal.
机译：研究了活性污泥厂（ASP）中的负载量和有机组成对烷基酚化合物命运的影响。研究了三种ASP设计，包括碳质，碳质/硝化和碳质/硝化/反硝化处理，以证明工艺复杂性水平提高的影响并纳入一系列负载条件。基于质量平衡，碳，碳/硝化和碳/碳的壬基酚乙氧基化物（NPEO），短链羧酸盐（NP，-3EC）和壬基酚（NP）的总体生物降解效率分别为37％，59％和27％。硝化/反硝化ASP。丰富的氨氧化细菌群落的存在并不一定促进烷基酚类化合物的有效降解。但是，在三个ASP处确定了烷基酚化合物的负载量与长链乙氧基化合物的生物降解之间的明确相关性，表明在较高的初始烷基酚化合物浓度（或负载）下，可以发生更大的乙氧基化物生物转化。另外，评估了沉降的污水有机组成对烷基酚化合物去除的影响。确定了化学需氧量（COD）与烷基酚化合物浓度的比率与生物量活性之间的相关性，证明了本体有机物对烷基酚聚乙氧基化物转化活性的抑制作用。在所有三个ASP上，提出的生物降解途径都涉及两亲性乙氧基化化合物的优先生物降解，此后发生亲脂性烷基酚部分的优先攻击。乙氧基化物生物降解的程度受初始烷基酚类化合物浓度和由烷基酚聚乙氧基化物（APEO）及其代谢物构成的COD相对于污水中蛋白质，酸，脂肪和多糖组成的有机总含量的比例驱动。这项研究产生的二次废水的特征在于低的总有机物浓度和较高的微污染物浓度。基于本研究提出的生物降解机制，将高速率的三次生物处理工艺应用于以低总体有机物浓度和较高APEO浓度为特征的二次废水，有望为微污染物的去除提供可持续的解决方案。

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  • 来源
    《Environmental Science & Technology》 |2011年第1期|p.248-254|共7页
  • 作者

    EWAN J. MCADAM; JOHN P. BAGNALL; ANA SOARES; YOONG K. K. KOH; TZE Y. CHIU; MARK D. SCRIMSHAW; JOHN N. LESTER; ELISE CARTMELL;

  • 作者单位

    Centre for Water Science, Cranfield University, Bedfordshire, MK43 OAL, U.K;

    Centre for Water Science, Cranfield University, Bedfordshire, MK43 OAL, U.K;

    Centre for Water Science, Cranfield University, Bedfordshire, MK43 OAL, U.K;

    Public Utilities Board, Technology and Water Quality Office, 40 Scotts Road No. 15-01;

    Environmental Building, 228231, Singapore, AECOM Design Build, Wentworth Business Park, Tankersley, Barnsley, S75 3DL, U.K;

    Institute for the Environment, Brunei University, Uxbridge, Middlesex, UB8 3PH, U.K;

    Centre for Water Science, Cranfield University, Bedfordshire, MK43 OAL, U.K;

    Centre for Water Science, Cranfield University, Bedfordshire, MK43 OAL, U.K;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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