| 泥水预分离MBR膜污染缓减效能研究 |
| 摘要点击 2169 全文点击 1187 投稿时间：2008-07-19 修订日期：2008-09-11 |
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| 中文关键词 泥水预分离膜生物反应器 膜污染 污泥浓度 胞外聚合物 |
| 英文关键词 sludge/water pre-separation membrane bioreactor (S/W-MBR) membrane fouling MLSS extracellular polymeric substances (EPS) |
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| 中文摘要 |
| 通过长期运行实验，进行了泥水预分离膜生物反应器（sludge/water pre-separation membrane bioreactor, S/W-MBR）与传统淹没式膜生物反应器（submerged membrane bioreactor, SMBR）对比研究，考察了污泥浓度、胞外聚合物含量（extracellular polymeric substances, EPS）及过膜阻力（trans-membrane pressure, TMP）随运行时间的变化规律及其对膜污染的缓减作用.结果表明，S/W-MBR与SMBR生物区的污泥浓度基本一致，而S/W-MBR膜区的污泥浓度较SMBR有显著降低.两者生物区的EPS含量均随运行时间的延长而增加，而S/W-MBR膜区的单位质量污泥的EPS含量始终保持在15 mg/g左右的较低水平.S/W-MBR比SMBR具有更好的缓减膜污染能力，在近90d的连续运行过程中，前者的膜组件仅需清洗2次，后者的膜组件清洗了5次. |
| 英文摘要 |
| A long-term operation was conducted to investigate the alleviation of membrane fouling by sludge/water pre-separation membrane bioreactor (S/W-MBR). The variation of trans-membrane pressure (TMP), concentration of sludge and extracellular polymeric substances (EPS) on S/W-MBR and submerged membrane bioreactor (SMBR) was also studied. The results showed that the sludge concentration in S/W-MBR was basically identical with that of SMBR’s biotic area, while the sludge concentration was significantly decreased in S/W-MBR’s membrane area than that of SMBR’s. The concentration of EPS was increased with operation time in both two MBRs’ biotic area, but it was lower and basically maintained at the level of 15 mg/g in S/W-MBR’s membrane area. The S/W-MBR was more capable of alleviating membrane fouling, and it had been cleaned only 2 times while the SMBR who had been cleaned 5 times during the period of about 90 days laboratory performance. |
