Hybrid UASFB-aerobic bioreactor for biodegradation of acid yellow-36 in wastewater.
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).
Ahmad
Rais
R
Environmental Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202 002, UP, India. raisdye@gmail.com
Mondal
Pijush Kanti
PK
Usmani
Shams Qamar
SQ
D000332:Aerobiosis; D001391:Azo Compounds / Q000378:metabolism*; D019149:Bioreactors; D014873:Water Pollutants / Q000378:metabolism*
D001391:Azo Compounds; D014873:Water Pollutants; C005108:metanil yellow