环境工程学报2017，Vol.11Issue(8)：4542-4548,7.DOI:10.12030/j.cjee.201606166
曝气对管式MBR膜污染及临界通量影响
Effect of aeration on membrane fouling and critical flux in microfiltration tubular membranes
摘要
Abstract
The effect of aeration on membrane fouling under a constant permeate flux was researched for a tubular membrane filtering a kaolin suspension.Variations in transmembrane pressure (TMP) and membrane operation time under different superficial gas velocity were also investigated.The critical flux was also identified by incrementing the flux until TMP was no longer steady.The results showed that aeration could significantly alleviate membrane fouling, prolong membrane operation time, and also enhance the critical flux of the membrane.The average membrane fouling rate was reduced from 0.366 to 0.104 kPa · h-1 and the average operation time increased from 8 to 31 d when the superficial gas velocity increased from 0.067 to 0.251 m · s-1 Concurrently,the critical flux increased from 8 to 10 to 22 to 26 L · (m2 · h)-1.In addition, the inertial lift model for critical flux determination indicated that the critical flux had a linear relationship with the superficial mixture velocity (R2 =0.98).However, with increase in the superficial gas velocity, the kaolin particle size became smaller and the ratio of irremovable resistance increased from 13.9％ to 31.6％.This condition may be not conducive to membrane fouling control.关键词
曝气/膜污染/临界通量/污染阻力分析Key words
aeration/membrane fouling/critical flux/membrane resistance analysis分类
资源环境引用本文复制引用
钱光磊,谢陈鑫,滕厚开,张艳芳,赵慧,周集体..曝气对管式MBR膜污染及临界通量影响[J].环境工程学报,2017,11(8):4542-4548,7.基金项目
“十二五”国家科技支撑计划项目(2014BAE06B00) （2014BAE06B00）
