Removal of indicator bacteriophages from municipal wastewater by a full-scale membrane bioreactor and a conventional activated sludge process: Implications to water reuse
Removal of indicator bacteriophages from municipal wastewater by a full-scale membrane bioreactor and a conventional activated sludge process: Implications to water reuse
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DOI：
10.1016/j.biortech.2012.11.113
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发表时间：
2013-02-01
影响因子：
11.4
通讯作者：
Zanetti, Franca
中科院分区：
文献类型：
--
作者：
De Luca, Giovanna;Sacchetti, Rossella;Zanetti, Franca
比较了膜生物反应器(MBR)和常规活性污泥法(CASP)对城市污水中噬菌体和细菌粪便指示剂的去除效果。在处理后的出水中总是检测到体细胞噬菌体(SOMCPH)和F-RNA特异性噬菌体(FRNAPH)(平均值：6Log(10))，而感染类杆菌碎片的噬菌体并不总是存在(平均值：3.9Log(10))。与CASP相比，MBR工艺对SOMCPH和FRNAPH的降解率分别高出2.7和1.7对数量级(P<；0.05)。SOMCPH被发现是评估MBR性能的最合适的指标，因为它们表现出比FRNAPH更强的生物过滤阻力，并且在预处理出水中的分布比BFRAGPH更规则。此外，由于传统的细菌指示剂几乎全部被生物过滤去除，SOMCPH被证明是评估MBR出水排放到自然水域或回用时微生物风险的最佳指标。(C)2012爱思唯尔有限公司。保留所有权利。
The effectiveness of a full scale membrane bioreactor (MBR) in the removal of bacteriophages and bacterial fecal indicators from municipal wastewater was compared with that obtained by conventional activated sludge process (CASP). Somatic coliphages (SOMCPH) and F-RNA specific bacteriophages (FRNAPH) were always detected in the pre-treated effluent (mean: 6Log(10)), while phages infecting Bacteroides fragills were not always present (mean: 3.9Log(10)). The MBR process was able to achieve respectively 2.7 and 1.7Log(10) higher reductions of SOMCPH and FRNAPH compared to CASP (significant differences: P < 0.05). SOMCPH were found to be the most suitable indicators for assessing MBR performance, since they showed greater resistance to biofiltration than FRNAPH and a more regular distribution in pre-treated effluent than BFRAGPH. Moreover, since the traditional bacterial indicators were almost totally removed by biofiltration, SOMCPH proved to be the best indicators to evaluate the microbiological risk when MBR effluent is discharged into natural waters or reused. (C) 2012 Elsevier Ltd. All rights reserved.