Hybrid biofilm-membrane bioreactor (Bf-MBR) for minimization of bulk liquid-phase organic substances and its positive effect on membrane permeability
Hybrid biofilm-membrane bioreactor (Bf-MBR) for minimization of bulk liquid-phase organic substances and its positive effect on membrane permeability
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用于最小化大量液相有机物质的混合生物膜-膜生物反应器（Bf-MBR）及其对膜渗透性的积极影响
DOI：
10.1016/j.biortech.2015.09.089
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发表时间：
2015
影响因子：
11.4
通讯作者：
Z.J. Dong
中科院分区：
文献类型：
--
作者：
F.Y. Sun;P. Li;J. Li;H.J. Li;Q.M. Ou;T.T. Sun;Z.J. Dong
平行运行四个具有不同固定载体体积（C:M）的生物膜生物反应器（Bf-MBR），通过与传统MBR进行比较，研究附着生长模式生物量参与对液相有机物特性和膜渗透性变化的影响。实验表明，Bf-MBR 中 C:M 以及生物膜与悬浮固体共存导致污染物去除效果略有差异，并且生物质特性和细菌活性也有很大差异。 Bf-MBRs本体悬浮液的膜渗透性和比电阻与液相有机物质密切相关，包括可溶性微生物产物（SMP）和生物聚合物簇（BPC）。与传统MBR相比，具有适当C:M的Bf-MBR总生物量含量和食物链较低，其中生物膜的形成及其主导作用影响液相有机物，特别是通过降低其含量并最大限度地减少小分子量的强疏水性和弱疏水性组分，从而显着减轻膜污染。
Four biofilm membrane bioreactors (Bf-MBRs) with various fixed carrier volumes (C:M) were operated in parallel to investigate the effect of attached-growth mode biomass involvement to the change of liquid-phase organics characteristics and membrane permeability, by comparing with conventional MBR. The experiments displayed that C:M and co-existence of biofilm with suspended solids in Bf-MBRs resulted in slight difference in pollutants removal effectiveness, and in rather distinct biomass properties and bacterial activities. The membrane permeability and specific resistance of bulk suspension of Bf-MBRs related closely with the liquid-phase organic substance, including soluble microbial products (SMP) and biopolymer cluster (BPC). Compared with conventional MBR, Bf-MBR with proper C:M had a low total biomass content and food-chain, where biofilm formation and its dominance affected liquid-phase organics, especially through reducing their content and minimizing strongly and weakly hydrophobic components with small molecular weight, and thus to mitigate membrane fouling significantly.