| 膜生物流化床的膜污染控制特性 |
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| 引用本文： | 郭杨,乔红杰,王世和,刘琴,施颖.膜生物流化床的膜污染控制特性[J].东南大学学报(自然科学版),2009,39(2). |
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| 作者姓名： | 郭杨 乔红杰 王世和 刘琴 施颖 |
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| 作者单位： | 1. 东南大学土木工程学院,南京,210096
2. 江宁水务集团公司,南京,211100 |
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| 基金项目： | 江苏省建设厅资助项目 |
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| 摘 要： | 通过传统膜生物反应器(MBR)和膜生物流化床(MBFB)的对比试验,研究了2个系统的膜过滤特性.并从生物质量浓度及结构、胞外聚合物(EPS)的含量与组成、以及污泥沉降性能3个方面分析了MBFB中混合液性质的改变对膜污染控制的影响.结果表明:MBFB具有更优越的抗膜污染性能,平均膜污染速率仅为MBR的38.8%;MBFB中微生物以附着生物膜为主,悬浮污泥质量浓度(MLSS)仅为总生物质量浓度的41%,减轻了悬浮污泥在膜面的沉积和游离细菌对膜孔的堵塞;MBFB混合液中EPS的含量及蛋白质、可溶性EPS(SEPS)所占比例较之MBR明显降低,且EPS不易黏附在膜面形成污染;MBFB和MBR长期运行的污泥容积指数SVI值分别在80和180 mL/g左右,较低的SVI值使MBFB的跨膜压力(TMP)上升速率得到良好控制,延长了膜过滤周期.
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| 关 键 词： | 膜生物流化床 膜污染 生物质量浓度 胞外聚合物 污泥沉降性能 |
Control characteristic of membrane fouling in membrane biological fluidized bed |
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| Guo Yang,Qiao Hongjie,Wang Shihe,Liu Qin,Shi Ying.Control characteristic of membrane fouling in membrane biological fluidized bed[J].Journal of Southeast University(Natural Science Edition),2009,39(2). |
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| Authors: | Guo Yang Qiao Hongjie Wang Shihe Liu Qin Shi Ying |
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| Institution: | 1School of Civil Engineering;Southeast University;Nanjing 210096;China;2Jiangning Municipal Water Affairs Group Company;Nanjing 211100;China |
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| Abstract: | The membrane filtration was comparatively investigated in a membrane biological fluidized bed(MBFB) and a conventional membrane bioreactor(MBR). The effects of mixed liquor characteristics on membrane fouling control in the MBFB were researched through the concentration and constitution of microorganism,the quantity and components of extracellular polymeric substances(EPS) and the sludge settleability.The results indicate that the MBFB shows better filtration performance than the MBR,and the average rate of... |
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