摘要
在相同的进水和运行条件下 ,考察和比较了生物活性炭—膜生物反应体系 (BPAC—SMBR)与常规的活性污泥—膜生物反应体系 (AS—SMBR)的膜过滤特性 ,并就粉末活性炭 (PAC)对通量改善的相关机理进行了探讨。结果表明 ,添加 1.2g/L的PAC可明显改善SMBR的过滤性能。与AS—SMBR相比 ,BPAC—SMBR的临界通量可提高 32 % ;相同恒通量下的长期运行结果也表明BPAC—SMBR透膜压力的升高更为缓慢 ,其稳定运行周期可达到AS—SMBR的 1.8倍 ;BPAC—SM BR的膜过滤总阻力比AS—SMBR的低约 4 4% ,其差别主要来自于滤饼阻力的减少。此外 ,还分析了混合液粘度。
The investigation and comparison analysis of the filtration performances of two membrane bioreactors i.e.,biological powdered activated carbon /submerged membrane bioreactor (BPAC/SMBR) and conventional activated sludge/submerged membrane bioreactor (AS/SMBR) were conducted with same influent and under same operating condition.Discussion was made on the mechanism of how the powdered activated carbon (PAC) improves membrane flux.Result shows that adding 1.2 g/L PAC can improve the filtration effectiveness significantly and the critical membrane flux of BPAC/SMBR increases 32% more than that of AS/SMBR.After running at constant membrane flux for sufficient time,it shows that in BPAC/SMBR system the trans-membrane pressure increasing is more slowly and its steady operating period is 1.8 times more by comparing with AS/SMBR system.Also the total membrane resistance in BPAC/SMBR is decreased by 44% by comparing with AS/SMBR.The difference is mainly caused from the filter cake resistance decreasing.In addition,other influence factors such as the mixed liquid viscosity and particle size were analyzed.
出处
《中国给水排水》
CAS
CSCD
北大核心
2004年第10期10-13,共4页
China Water & Wastewater
基金
陕西省科技发展计划资助项目 (2 0 0 1K0 6 -G17)
关键词
膜生物反应器
生物活性炭
活性污泥
膜污染
滤饼阻力
membrane bioreactor
biological activated carbon
activated sludge
membrane fouling
filter cake resistance