| 逆出水方向曝气反冲洗在动态膜生物反应器中的应用 |
| 摘要点击 2702 全文点击 1536 投稿时间：2006-06-26 修订日期：2006-08-09 |
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| 中文关键词 在线反冲洗 逆出水方向 动态膜 膜生物反应器 |
| 英文关键词 online backwashing inverse direction of effluent dynamic membrane membrane bio-reactor |
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| 中文摘要 |
| 采用逆出水方向曝气措施对以无纺布构建的动态膜生物反应器生活污水处理系统中的动态膜进行在线反冲洗.当反冲洗曝气强度为5.6 m3/(m2·h)、反冲洗时间为5 min时，生物动态膜的恢复需要45 min，生物动态膜恢复后出水浊度保持在5 NTU以下.在该反冲洗条件下，反应器稳定运行2个月，反冲洗周期可以稳定在15 h左右.扫描电镜观察表明，逆出水方向曝气反冲洗能够有效破坏附着在膜基材上的生物动态膜.生物动态膜截留能力研究表明，新的生物动态膜形成后，反应器对相对分子质量3×104以上的有机物的截留率大于50％.逆出水方向曝气是一种经济有效的动态膜反应器在线清洗方法. |
| 英文摘要 |
| Aeration in the inverse direction of effluent was applied as the measure of online backwashing to control membrane pollution in the dynamic membrane bio-reactor treating sewage wastewater. When the intensity of aeration was 5.6 m3/(m2·h) and the aeration time was 5min, it took 45 min for the dynamic membrane to recover filtration capacity. With the recovery of dynamic membrane filterability, effluent turbidity was below 5 NTU. The backwashing interval of the reactor could maintain about 15 h. SEM pictures showed that online aeration backwashing in the inverse direction of effluent could efficiently destroy part of dynamic membrane layer. After the dynamic membrane recovery, dynamic membrane could check more than 50% TOC of various molecule weights range >3×104. Aeration in the inverse direction of effluent was an economical and effective means of online backwashing in the dynamic membrane bio-reactor. |
