期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 279, 期 -, 页码 511-517出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2014.07.036
关键词
Aerobic granulation; Zero-valent iron (ZVI); Extracellular polymeric substances (EPS); Microbial community
资金
- China Postdoctoral Science Foundation [2014M551950]
- Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta (Binzhou University) [2013KFJJ01]
This study elucidates the enhancement of aerobic granulation by zero-valent iron (ZVI). A reactor augmented with ZVI had a start-up time of aerobic granulation (43 days) that was notably less than that for a reactor without augmentation (64 days). The former reactor also had better removal efficiencies for chemical oxygen demand and ammonium. Moreover, the mature granules augmented with ZVI had better physical characteristics and produced more extracellular polymeric substances (especially of protein). Three-dimensional-excitation emission matrix fluorescence showed that ZVI enhanced organic material diversity. Additionally, ZVI enhanced the diversity of the microbial community. Fe2+ dissolution from ZVI helped reduce the start-up time of aerobic granulation and increased the extracellular polymeric substance content. Conclusively, the use of ZVI effectively enhanced aerobic granulation. (C) 2014 Elsevier B.V. All rights reserved.
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