Author(s): Rajaguru P, Kalaiselvi K, Palanivel M, Subburam V, Rajaguru P, Kalaiselvi K, Palanivel M, Subburam V, Rajaguru P, Kalaiselvi K, Palanivel M, Subburam V, Rajaguru P, Kalaiselvi K, Palanivel M, Subburam V
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Abstract A sequential anaerobic aerobic treatment process based on mixed culture of bacteria isolated from textile dye effluent-contaminated soil was used to degrade sulfonated azo dyes Orange G (OG), Amido black 10B (AB), Direct red 4BS (DR) and Congo red (CR). Under anaerobic conditions in a fixed-bed column using glucose as co-substrate, the azo dyes were reduced and amines were released by the bacterial biomass. The amines were completely mineralized in a subsequent aerobic treatment using the same isolates. The maximum degradation rate observed in the treatment system for OG was 60.9 mg/l per day (16.99 mg/g glucose utilized), for AB 571.3 mg/l per day (14.46 mg/g glucose utilized), for DR 112.5 mg/l per day (32.02 mg/g glucose utilized) and for CR 134.9 mg/l per day (38.9 mg/g glucose utilized).
This article was published in Appl Microbiol Biotechnol
and referenced in Journal of Chemical Engineering & Process Technology