Seasonal variation in membrane fouling in membrane bioreactors (MBRs) treating municipal wastewater
Seasonal variation in membrane fouling in membrane bioreactors (MBRs) treating municipal wastewater
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DOI：
10.1016/j.watres.2009.08.035
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发表时间：
2009-12-01
期刊：
影响因子：
12.8
通讯作者：
Watanabe, Yoshimasa
中科院分区：
文献类型：
--
作者：
Miyoshi, Taro;Tsuyuhara, Tomoo;Watanabe, Yoshimasa
我们调查了膜生物反应器（MBR）处理城市污水的膜污染的季节性变化，物理可逆和不可逆污染之间的差异。两个独立的MBR具有不同的固体保留时间（SRT）平行运行约200天，包括高，低温时期，以评估操作条件对膜污染的季节性变化的影响。两种类型的膜污染的季节性变化（即，物理可逆和不可逆的结垢）。然而，在MBR与较长的SRT（50天），有两种类型的膜污染没有显着的季节变化。在短SRT的MBR中，物理可逆和不可逆污染发展速率的季节变化趋势不同。在低温阶段，物理可逆结垢更为显著，而在高温阶段，物理不可逆结垢发展更为迅速。膜生物反应器混合液悬浮液中溶解性有机物的浓度可以解释物理可逆污染的发展速率;而溶解性有机物的浓度不能解释物理不可逆污染的发展速率。溶解性有机物的特性随温度的变化而变化，其变化趋势与引起物理不可逆结垢的结垢物的变化趋势相似。研究结果表明，物理可逆和不可逆结垢的季节变化分别与有机物的数量和质量变化有关。(C)2009爱思唯尔有限公司保留所有权利。
We investigated seasonal variation in membrane fouling in membrane bioreactors (MBRs) treating municipal wastewater regarding the difference between physically reversible and irreversible fouling. Two separate MBRs with different solid retention times (SRTs) operated in parallel for about 200 days including high-and low-temperature periods to evaluate the effect of operating conditions on seasonal variation of membrane fouling. Seasonal variations of both types of membrane fouling (i.e., physically reversible and irreversible fouling) were observed for the MBR with short SRT (13 days). However, in the MBR with long SRT (50 days), there were no significant seasonal variations in both types of membrane fouling. In the MBR with short SRT, the trends in the seasonal variation in the development rates of physically reversible and irreversible fouling were different. Physically reversible fouling was more significant in the low-temperature period, while physically irreversible fouling developed more rapidly in the high-temperature period. The development rates of physically reversible fouling can be related to the concentration of dissolved organic matter in the mixed liquor suspension of MBRs; whereas those of physically irreversible fouling could not be explained by the concentration of dissolved organic matter. The characteristics of dissolved organic matter differed depending on the temperature period, and the trends of dissolved organic matter variation in mixed liquor were similar with those of foulants that caused physically irreversible fouling. The results obtained in this study indicated that seasonal variation in physically reversible and irreversible fouling is related to changes in quantity and quality of organic matter, respectively. (C) 2009 Elsevier Ltd. All rights reserved.