生物制剂对MBR中无纺布膜组件过滤性能的影响
Effect of biologics on filtration of non-woven fabric module in membrane bio-reactor
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摘要: 研究了生物制剂对浸渍式膜生物反应器( submerged membrane bioreactor, SMBR) 中聚丙烯无纺布(non-woven fabric, NWF)膜组件过滤性能的影响。结果表明,能减少膜组件表面附着污泥胞外聚合物(extra-cellular polymeric substances, EPS)的含量及污泥的沉积,减缓膜通量的衰减速率和膜污染,无纺布膜组件的过滤性能得到明显改善,表现出一定的耐污染性。生物制剂能改善污泥的沉降性能,有效防止污泥膨胀;对MBR的COD去除率基本没有影响,但略微增大了处理水的浊度。Abstract: The effect of biologics on filtration of non-woven fabric (NWF) module in the submerged membrane bioreactor (SMBR) was investigated. The results showed that biologics can reduce sludge extra-cellular polymeric substances (EPS) absorbed on the membrane model surface and sludge accumulation, and slow down the flux decline and membrane fouling. The filtration performance of non-woven fabric module is improved obviously and the un-fouling performance is increased. Biologics can improve sludge settling performance, prevent from sludge bulking,and does not affect the COD removal rate in MBR, but it appreciably increases the permeate turbidity.
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Key words:
- biologics /
- polypropylene non-woven fabric /
- membrane bioreactor
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