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:3 1 2～ 5 84mg/L ,RMBR的出水CODCr在运行 4d后 <1 5mg/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 2 2mg/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 ·1 8H2 O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 81L/ (m2 ·h) .在 2 2℃～ 3 0℃范围内 ,每升高 1℃可提高膜通量 1 9% .在连续运行1 0 0d中 ,RMBR可在无任何物理 ,化学清洗的条件下运行 1 4d而透膜压力无增大 ,膜通量不降低 .对于已污染的膜 ,水清洗、水碱共同清洗、水碱酸共同清洗可分别恢复至新膜膜通量的 4 7%、83 %、94 % .
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/(m 2·h) to 76 L/(m 2·h) or 81 L/(m 2·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%.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第3期61-64,共4页
Environmental Science
基金
国家自然科学基金资助项目 (5 983 3 12 0 )
关键词
分体式膜-生物反应器
污水处理
膜污染
临界膜通量
recirculated membrane bioreactor
wastewater treatment
membrane fouling
critical membrane flux
