Characteristics of the extracellular polymeric substance composition in an up-flow biological aerated filter reactor: The impacts of different aeration rates and filter medium heights
Characteristics of the extracellular polymeric substance composition in an up-flow biological aerated filter reactor: The impacts of different aeration rates and filter medium heights
复制标题
上流式曝气生物过滤反应器中胞外聚合物组成的特征：不同曝气速率和过滤介质高度的影响
DOI：
10.1016/j.biortech.2019.121664
复制
发表时间：
2019
影响因子：
11.4
通讯作者：
Taotao Lv
中科院分区：
文献类型：
--
作者：
Jiehui Ren;Wen Cheng;Tian Wan;Min Wang;Ting Meng;Taotao Lv
In this study, the compositional characteristics of extracellular polymeric substances (EPS) were systematically explored to reveal their relationship with microbial community under different conditions in an up-flow biological aerated filter reactor. The aeration rates had a significant positive correlation (0.898≤R≤0.979) with the tightly bound (TB)-EPS contents, but basically showed an opposite trend (R < −0.631) with the loosely bound (LB)-EPS. Moreover, the filter medium heights also affected EPS distribution. The microbial biofilm produced more LB-EPS and TB-EPS to withdraw from the extreme environment. Five fluorescent substances were identified in the EPS by EEM-PARAFAC modeling; namely, two protein-like components (protein-like C1 and.tryptophan-like C2) and three humic-like components (UVA marine humic-like C3, hydrophobic humic acid-like C4, and humic acid-like C5). Under different conditions, the relative abundance of Proteobacteria and Nitrospirae had a significant positive correlation with C5 and C4, respectively. These results demonstrated that microbial community distribution could affect EPS composition.
