| 分体式膜-生物反应器在废水处理中的工艺条件 |
| 摘要点击 1415 全文点击 1472 投稿时间：2002-06-27 修订日期：2002-09-16 |
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| 中文关键词 分体式膜生物反应器 污水处理 膜污染 临界膜通量 |
| 英文关键词 recirculated membrane bioreactor wastewater treatment membrane fouling critical membrane flux |
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| 中文摘要 |
| 对分体式膜-生物反应器(RMBR)处理废水进行了研究.进水CODCr:312～584mg/L,RMBR的出水CODCr在运行4d后＜15 mg/L并稳定.向生物反应器添加0.5g/L(混合液)的粉末活性炭(PAC)后出水CODCr＜4.22mg/L.膜侧污水流速在0.9～1.9m/s范围内,临界膜通量随膜侧污水流速的增大而增大.添加PAC,组合添加PAC和Al2(SO4)3·18 H2O均可有效提高临界膜通量.在膜侧流速1.9m/s的条件下,临界膜通量从72L/(m2·h)分别增至76L/(m2·h)和81 L/(m2·h)在22℃～30℃范围内,每升高1℃可提高膜通量1.9%.在连续运行100d中,RMBR可在无任何物理,化学清洗的条件下运行14d而透膜压力无增大,膜通量不降低.对于已污染的膜,水清洗、水碱共间清洗、水碱酸共同清洗可分别恢复至新膜膜通量的47%、83%、94%. |
| 英文摘要 |
| In this paper, wastewater was treated with Recirculated Membrane Bio Reactor (RMBR) and effluent quality became stable after four days running continuously. Critical membrane flux was increased with increasing crossflow velocity between 0.9～1.9m/s. Under crossflow velocity of 1.9m/s, critical membrane flux was enhanced from 72L/(m2·h) to 76 L/(m2·h) or 81 L/(m2·h) respectively when powdered activated carbon (PAC) or both PAC and alum were added to the system. Between 22℃～30℃, the flux was elevated 1 9% per 1℃ increased. Fouling materials were removed efficiently through cleaning physically or/and chemically with flux recovery of 47%～94%. |
