College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China; School of Civil Engineering, Jilin Jianzhu University, Xincheng Street 5088, ChangChun 130118, China.
College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China.
Water Res. 2018 May 15;135:288-301. doi: 10.1016/j.watres.2018.02.027. Epub 2018 Feb 14.
The performance of a pilot-scale anaerobic membrane bioreactor (AnMBR) for treating antibiotic solvent wastewater under different cross flow velocities (CFV) was investigated. Effects of mixed liquid suspended solids (MLSS), colloid total organic carbon (TOC) and CFV on membrane fouling rate (R) were also explored in this paper. Throughout 341 days of experiment, the average total removal rate of N, N-Dimethylformamide (DMF) was 98.5% which hardly affected by the variation of CFV, and the compliance rate of DMF was 92% according to the Chinese standard (<25 mg/L). However, the relevant high total removal rate of M-cresol (MC) was achieved as 97.5%, the content of effluent failed to meet the national level emission standard (<0.1 mg/L). The biogas yield and the methane content of the biogas increased gradually with the increase of CFV, and the average methane content were over 70%. There were four kinds of methanogens in AnMBR, Methanosaeta spp was the largest methanogenic community, with an area of 45-70% of the archae. There was a linear relationship between colloid TOC and R at different MLSS concentrations. Then a universal mathematical model for the changes of R with influence factors was established. The result showed that model well fitted the laboratory data. It is suggested that the model proposed could reflect and manage the membrane fouling of AnMBR treating antibiotic solvent wastewater.
本研究考察了不同错流流速（CFV）下中试规模厌氧膜生物反应器（AnMBR）处理抗生素溶剂废水的性能。本文还探讨了混合液悬浮固体（MLSS）、胶体总有机碳（TOC）和 CFV 对膜污染速率（R）的影响。在 341 天的实验过程中，N、N-二甲基甲酰胺（DMF）的总去除率平均达到 98.5%，几乎不受 CFV 变化的影响，DMF 的达标率为 92%，符合中国标准（<25mg/L）。然而，M-甲酚（MC）的高总去除率达到了 97.5%，出水的含量未能达到国家一级排放标准（<0.1mg/L）。沼气产量和沼气中的甲烷含量随着 CFV 的增加逐渐增加，平均甲烷含量超过 70%。AnMBR 中有四种产甲烷菌，Methanosaeta spp 是最大的产甲烷菌群落，其面积占古菌的 45-70%。在不同 MLSS 浓度下，胶体 TOC 与 R 之间存在线性关系。然后建立了一个通用的数学模型来描述 R 随影响因素的变化。结果表明，该模型很好地拟合了实验室数据。建议提出的模型可以反映和管理抗生素溶剂废水处理中 AnMBR 的膜污染。
