大蒜素包埋球对膜生物反应器混合液可滤性影响解析

Influences of Allicin Entrapping Beads on Mixed Liquor Filterability in Membrane Bioreactor

将由大蒜素包埋在海藻酸钠中制成的大蒜素包埋球(AEBs)投加至膜生物反应器(MBR)中,以探讨大蒜素的群体猝灭(QQ)效应对MBR污泥混合液可滤性的影响。结果表明,QQ作用对污泥混合液性质影响显著,对MBR污染物去除影响较小;混合液中胞外聚合物(EPS)和溶解性微生物代谢产物(SMP)含量降低;通过对修正污染指数(MFI)检测表明,QQ可提高污泥混合液可滤性,该指标与胞外多糖浓度紧密相关。

Allicin entrapping beads （AEBs） with a porous microstructure were prepared by entrapping allicin into alginate beads for investigating the quorum quenching （QQ） effect of allicin to the mixed liquor filterability in membrane bioreactor （ MBR）. The results showed that the QQ of alliein has a significant impact on the characteristics of activated sludge, whereas there is no obviously impact on the removal of pollutants in MBR. h was observed that the content of extracellular polymeric substances （EPS） , soluble microbial products （SMP） as well as the modified fouling index （MFI） values were obviously decreased compared to the MBR-control, which indicated that the addition of AEBs would benefit to improve the filterability of activated sludge in MBR. Moreover, the formation ability of biofilm on the membrane surface was reduced by adding AEBs in MBR.