移动床生物膜-膜生物反应器中胞外聚合物和可溶性微生物产物的特性。
The characteristics of extracellular polymeric substances and soluble microbial products in moving bed biofilm reactor-membrane bioreactor.
机构信息
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Dayangfang 8, Anwai Beiyuan, Beijing 100012, China; Department of Civil and Environmental Engineering, University of California, Berkeley, 629 Davis Hall #1710, Berkeley, CA 94720-1710, USA.
出版信息
Bioresour Technol. 2013 Nov;148:436-42. doi: 10.1016/j.biortech.2013.08.147. Epub 2013 Sep 2.
The characteristics of extracellular polymeric substances (EPS) and soluble microbial products (SMP) in conventional membrane bioreactor (MBR) and in moving bed biofilm reactor-membrane bioreactors (MBBR-MBR) were investigated in long-term (170 days) experiments. The results showed that all reactors had high removal efficiency of ammonium and COD, despite very different fouling conditions. The MBBR-MBR with media fill ratio of 26.7% had much lower total membrane resistance and no obvious fouling were detected during the whole operation. In contrast, MBR and MBBR-MBR with lower and higher media fill experienced more significant fouling. Low fouling at optimum fill ratio may be due to the higher percentage of small molecular size (<1 kDa) and lower percentage of large molecular size (>100 kDa) of EPS and SMP in the reactor. The composition of EPS and SMP affected fouling due to different O-H bonds in hydroxyl functional groups, and less polysaccharides and lipids.
在长期（170 天）实验中，研究了常规膜生物反应器（MBR）和移动床生物膜反应器-膜生物反应器（MBBR-MBR）中细胞外聚合物（EPS）和可溶性微生物产物（SMP）的特性。结果表明，尽管污染条件非常不同，但所有反应器对铵和 COD 的去除率都很高。在整个运行过程中，填充率为 26.7%的 MBBR-MBR 的总膜阻力要低得多，并且没有明显的污染。相比之下，填充率较低和较高的 MBR 和 MBBR-MBR 经历了更严重的污染。在最佳填充率下的低污染可能是由于 EPS 和 SMP 中小分子尺寸（<1 kDa）的比例较高和大分子尺寸（>100 kDa）的比例较低。EPS 和 SMP 的组成因羟基官能团中的不同 O-H 键以及较少的多糖和脂质而影响污染。
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