| 错流膜生物反应器水力清洗特性研究 |
| 摘要点击 1927 全文点击 1657 投稿时间：1998-08-22 |
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| 中文关键词 膜生物反应器 错流 膜污染 水力清洗 传质机理 |
| 英文关键词 membrane bioreactor crossflow membrane fouling hydraulic cleaning mechanism of mass transfer |
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| 中文摘要 |
| 采用外压管式聚砜-聚丙烯腈共混超滤膜进行错流膜生物反应器水力清洗特性研究。结果表明:清洗时采用高膜面流速、低操作压力和限制透过液对流传递作用有利于错流膜生物反应器通量的恢复,这符合膜污染形成和去除过程中的传质机理;适宜的膜面流速应稍大于临界流速vk=1.92m/s,清洗时间应控制在10min,适宜的清洗操作压力为0.07MPa. |
| 英文摘要 |
| The external pressure tubular moduel and PS-PAN blended membranes were used in the study on the characteristics of hydraulic cleaning in crossflow membrane bioreactor.It was demonstrated that low trans-membrane pressure and high velocities along membrane surface played an important role in removing the fouling layer and so did the elimination of the effect of the convective transport to membrane because the pressure differences across the membrane were reduced to zero.Considerations of the mechanism of mass transfer in the formation and elimination of the membrane fouling furtherly supported these cleaning conditions.The cleaning operation parameters were obtained at crossflow velocity a little more than vk=1.92m/s which was the critical velocity,cleaning time about 10min,trans-membrane about 0.07MPa. |
