Evaluation of dye decolorization using anaerobic granular sludge from an expanded granular sludge bed based on spectrometric and microbiome analyses.

Tomohiro Inaba,Mami Yamaguchi, Akira Taniguchi,Yuya Sato,Tomo Aoyagi,Tomoyuki Hori, Hiroyuki Inoue,Masahiko Fujita, Masanori Iwata, Yoshihiro Iwata,Hiroshi Habe

The Journal of general and applied microbiology(2023)

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The decolorization of 11 dyes by granular sludge from an anaerobic expanded granular sludge bed (EGSB) reactor was evaluated. Biological decolorization of Reactive Red 21, 23, and 180, and Reactive Yellow 15, 17, and 23 in model textile wastewater was observed for the first time after a 7-day incubation (over 94% decolorization). According to the sequencing analysis of 16S rRNA gene amplicons from EGSB granular sludge, the operational taxonomic unit related to Paludibacter propionicigenes showed the highest increase in relative abundance ratios in the presence of dyes (7.12 times on average over 11 dyes) compared to those without dyes.
anaerobic granular sludge,decolorization,expanded granular sludge bed reactor,microbial community structure,textile dyes
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