A two-stage Expanded Granular Sludge Bed (EGSB) reactors were used to treat the fermentation wastewater containing high concentration of sulfate to achieve sulfate removal in the first EGSB and organic removal in the second EGSB. The reactors ran at influent COD of 5000 mg/L, SO42- of 1000 mg/L , temperature of (33 � 1)? and hydraulic retention time (HRT) of 24h ~ 12h. The removal efficiencies of sulfate and COD reached more than 90% and 80% with HRT of 12h, respectively. Scanning electron microscopy observation results showed that biological morphology of surface and inside of granular sludge changed significantly. The high-throughput sequencing results showed an obvious changes in microbial communities of the sludge compared with that in inoculated sludge. Desulfovibrio gradually became the predominant bacteria in the microbial community after a reactor operation of 110 days.

Study on treatment of fermentation wastewater by Two-Stage EGSB

248th National Meeting (2014)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.