Effect of sludge retention time on sludge characteristics and membrane fouling of membrane bioreactor
文献类型：期刊论文
| 作者 | Liu Junxin; Ouyang Ke |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
 |
| 出版日期 | 2009 |
| 卷号 | 21期号:10页码:1329-1335 |
| 关键词 | Membrane Bioreactor Sludge Retention Time Extracellular Polymeric Substances Wastewater Treatment |
| 英文摘要 | Three identical membrane bioreactors (MBRs) were operated over 2 years at different sludge retention time (SRT) of 10 d, 40 d and no sludge withdrawal (NS), to elucidate and quantify the effect of SRT on the sludge characteristics and membrane fouling. The hydraulic retention times of these MBRs were controlled at 12 h. With increasing SRT, the sludge concentrations in the MBRs increased, whereas the ratio of volatile suspended solid to the total solid decreased, and the size of sludge granule diminished in the meantime. A higher sludge concentration at long SRT could maintain a better organic removal efficiency, and a longer SRT was propitious to the growth of nitrifiers. The performance of these MBRs for the removal of COD and NH(4)(+)-N did not change much with different SRTs. However, the bioactivity decreased as SRT increase. The measurement of specific oxygen uptake rates (SOUR) and fluorescence in situ hybridization (FISH) with rRNA-targeted oligonucleotide probes testified that SOUR and the proportion of the bacteria-specific probe EUB338 in all DAPI-stainable bacteria decreased with increasing SRT. The concentrations of total organic carbon, protein, polysaccharides and soluble extracellular polymeric substance (EPS) in the mixed liquor supernatant also decreased with increasing SRT. The membrane fouling rate was higher at shorter SRT, and the highest fouling rate appeared at a SRT of 10 d. Both the sludge cake layer and gel layer had contribution to the fouling resistance, but the relative contribution of the gel layer decreased as SRT increase. |
| WOS记录号 | WOS:000271049700002 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21761]  |
| 专题 | 生态环境研究中心_水污染控制实验室 |
| 推荐引用方式 GB/T 7714 | Liu Junxin,Ouyang Ke. Effect of sludge retention time on sludge characteristics and membrane fouling of membrane bioreactor[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2009,21(10):1329-1335. |
| APA | Liu Junxin,&Ouyang Ke.(2009).Effect of sludge retention time on sludge characteristics and membrane fouling of membrane bioreactor.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,21(10),1329-1335. |
| MLA | Liu Junxin,et al."Effect of sludge retention time on sludge characteristics and membrane fouling of membrane bioreactor".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 21.10(2009):1329-1335. |
入库方式： OAI收割
来源：生态环境研究中心
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