Bisphenol-A removal in various wastewater treatment processes: Operational conditions, mass balance, and optimization
Bisphenol-A removal in various wastewater treatment processes: Operational conditions, mass balance, and optimization
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DOI：
10.1016/j.jenvman.2015.01.044
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发表时间：
2015-04-01
影响因子：
8.7
通讯作者：
Smyth, S. A.
中科院分区：
文献类型：
--
作者：
Guerra, P.;Kim, M.;Smyth, S. A.
对25个污水处理厂采集的499个液体和347个固体样品中的双酚A(BPA)进行了分析，探讨了影响BPA发生、去除和去向的因素。包括泻湖、化学辅助一级处理、二级处理和高级处理工艺。进水和出水中双酚A浓度的中位数分别为400 ng/L和150 ng/L。中位数的去除效率在1%到77%之间。初级污泥、次级生物污泥和生物固体中BPA含量的中位数分别为230、260和460 ng/g，其中消化后的生物固体的浓度最高。曝气生物滤池和膜生物反应器工艺的去除效果最好，而化学辅助一级处理的去除效果最低。水力停留时间(HRT)、固体停留时间(SRI)和混合液悬浮固体(MLSS)是影响生物降解和吸附去除BPA的主要因素。在低温条件下，HRT、SRT和MLSS对生物反应器的影响较大。为了达到80%以上的去除效果，夏季(中温19℃)HRT、SRI和MIST值分别为13h、7d和1600 mg/L，冬季(中温10℃)分别为13h、17d和5300 mg/L，说明冬季需要更长的SRT和更高的MLSS。BPA对污泥的吸附能力受硝化程度和水力停留时间的影响较大。皇冠版权所有(C)2015由爱思唯尔有限公司出版。保留所有权利。
Bisphenol-A (BPA) was analyzed in 499 liquid and 347 solid samples collected from twenty-five wastewater treatment plants (WWTPs) to investigate parameters affecting BPA occurrence, removal, and fate. Lagoons, chemically-assisted primary treatment, secondary treatment, and advanced treatment processes were included. Median BPA concentrations in influent and final effluent were 400 ng/L and 150 ng/L, respectively. Median removal efficiencies ranged from 1 to 77%. Respective median BPA levels in primary sludge, secondary biological sludge, and biosolids were 230, 260, and 460 ng/g with digested biosolids having the highest concentrations. The biological aerated filter and membrane bioreactor processes showed the best performance, while chemically-assisted primary treatment achieved the lowest removal. Biodegradation and sorption contributing to BPA removal were influenced by operational conditions: hydraulic retention time (HRT), solids retention time (SRI), and mixed liquor suspended solids (MLSS). The influence of HRT, SRT, and MLSS in the bioreactor was stronger during cold temperatures. In order to achieve above 80% removal, the required conditions for HRT, SRI, and MISS were 13 h, 7 days, and 1600 mg/L during summer (median temperature 19 degrees C) and 13 h, 17 days, and 5300 mg/L during winter (median temperature 10 degrees C); indicating that longer SRT and higher MLSS were needed during winter. BPA's sorption tendency to sludge was strongly influenced by the degree of nitrification and HRT. Crown Copyright (C) 2015 Published by Elsevier Ltd. All rights reserved.