摘要
进水盐度对膜生物反应器(MBR)的运行效能影响显著,尤其是进水含盐量为5 g/L时,明显恶化了污泥可滤性,膜污染速率加快;MBR混合液中溶解性微生物产物(SMP)和胞外聚合物(EPS)含量随钠离子浓度变化而变化,其中SMP中蛋白质含量与钠离子浓度密切相关;与紧密结合态EPS(TB)相比,钠离子含量对松散结合态EPS(LB)浓度的影响更大;不同盐度对COD及NH4+-N影响不明显,系统对COD及NH4+-N的去除效果稳定,分别保持在92%及94%以上,高盐度对MBR总磷去除率降低明显。
The salinity of the feed,especially at the high salinity,had an obviously effect on the membrane fouling. The sludge filterability would be deteriorated at the salt concentration of 5 g / L in the feed to lead to the increase of the rate of membrane fouling. The concentrations of soluble microbial product（ SMP） and extracellular polymeric substances（ EPS） in the activated sludge,especially the content of protein in SMP,were closely related to the concentration of the sodium ions,which had a more significant effect on the tightly bound EPS（ TB） than that of the loosely bound EPS（ LB）. The salinity had a little impact on the removal of COD and NH4＋-N,and their removal rate was maintained above 92% and 94%,respectively. However,a significantly decrease in the TP removal was observed under high salinity condition.
出处
《化学通报》
CAS
CSCD
北大核心
2016年第6期544-549,共6页
Chemistry
基金
国家自然科学基金项目(51478093)
吉林省科技发展计划项目(20120404
20130206061GX)资助
关键词
膜生物反应器
膜污染
盐度
溶解性微生物产物
胞外聚合物
Membrane bioreactor
Membrane fouling
Salinity
Soluble microbial product（SMP）
Extracellular polymeric substances（EPS）
