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Enhancement of aerobic granulation by zero-valent iron in sequencing batch airlift reactor

Version 2 2024-06-04, 05:35
Version 1 2015-02-09, 13:11
journal contribution
posted on 2024-06-04, 05:35 authored by Q Kong, HH Ngo, L Shu, RS Fu, CH Jiang, MS Miao
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. Fe(2+) 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.

History

Journal

Journal of hazardous materials

Volume

279

Pagination

511-517

Location

Amsterdam, Netherlands

eISSN

1873-3336

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2014, Elsevier

Publisher

Elsevier