title: Hybrid UASFB-aerobic bioreactor for biodegradation of acid yellow-36 in wastewater.
abstract: In this study, a combined anaerobic-aerobic treatment process based on mixed culture of bacteria was used to degrade azo dyes (AY-36). The experiment was integrated by exposing anaerobic granular sludge and aerobic aromatic amine degrading bacterial enrichment cultures. Under anaerobic conditions UASFB bioreactor using sodium acetate as a co-substrate, the AY-36 was reduced and resulting in a temporary accumulation of aromatic amines by the bacterial biomass. Hydraulic residence time (HRT) was fixed (24 h) through out the experiment. The two aromatic amine p-amino diphenylamine (p-ADPA) and 4-aminobenzenesulfonic acid (4-ABS) were detected from the reduction of AY-36. Subsequently, 4-ABS was degraded in the aerobic reactor which was earlier accumulated for 30days. But p-ADPA was not degraded in aerobic condition. The combined anaerobic-aerobic bioreactor was able to completely remove the AY-36 at a maximum loading rate of 100mg AY-36L(-1)d(-1).
authors.affiliation: Environmental Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202 002, UP, India. raisdye@gmail.com
authors.forename: Rais
authors.initials: R
authors.lastname: Ahmad
authors.forename: Pijush Kanti
authors.initials: PK
authors.lastname: Mondal
authors.forename: Shams Qamar
authors.initials: SQ
authors.lastname: Usmani
mesh_terms: D000332:Aerobiosis; D001391:Azo Compounds / Q000378:metabolism*; D019149:Bioreactors; D014873:Water Pollutants / Q000378:metabolism*
chemical_list: D001391:Azo Compounds; D014873:Water Pollutants; C005108:metanil yellow