A comparison between exogenous carriers enhanced aerobic granulation under low organic loading in the aspect of sludge characteristics, extracellular polymeric substances and microbial communities
A comparison between exogenous carriers enhanced aerobic granulation under low organic loading in the aspect of sludge characteristics, extracellular polymeric substances and microbial communities
复制标题
低有机负荷下外源载体强化好氧造粒污泥特性、胞外聚合物及微生物群落比较
DOI：
10.1016/j.biortech.2021.126567
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发表时间：
2022
影响因子：
11.4
通讯作者：
Liu Yongjun
中科院分区：
文献类型：
--
作者：
Liu Zhe;Zhang Xuhua;Zhang Shumin;Qi Hao;Hou Yiwen;Gao Min;Wang Jiaxuan;Zhang Aining;Chen Yiping;Liu Yongjun
In this study, polymeric ferric sulfate (PFS), aluminum sulfate (AS) and diatomite were added to enhance the aerobic granulation under low organic loading rate (OLR) of 0.6 kg·COD/(m3·d), and their effects of aerobic granule formation, extracellular polymeric substances (EPS) secretion and microbial community were investigated. The results showed that adding carriers could facilitated the growth of aerobic granules and improve the sludge settleability and biomass retention. Nutrient removal efficiencies were also enhanced. Compared with diatomite, adding PFS and AS resulted in more significant increase in EPS production, especially for the extracellular proteins. For microbial community, the dominated bacteria (Zoogloea, 18.47–23.95%) in the mature granular consortia were similar. Moreover, the introduction of PFS and diatomite contributed to the enrichment ofParacoccus, which was responsible for denitrification. Adding carriers potentially activated the functional genes related to metabolism and genetic information processing, and PFS had the most significant effects.
