Biodegradation of o-nitrophenol by aerobic granules with glucose as co-substrate

Basheer, F. and Isa, M.H. and Farooqi, I.H. (2012) Biodegradation of o-nitrophenol by aerobic granules with glucose as co-substrate. [Citation Index Journal]



Aerobic granules to treat wastewater containing o-nitrophenol were successfully developed in a sequencing batch reactor (SBR) using activated sludge as inoculum. Stable aerobic granules were obtained with a clearly defined shape and diameters ranging from 2 to 6 mm after 122 days of operation. The integrity coefficient (IC) and granules density was found to be 98% and 1,054 kg m�3 respectively. After development of aerobic granules, o-nitrophenols were successfully degraded to an efficiency of 78% at a concentration of 70 mg L�1. GC-MS study revealed that the biodegradation of o-nitrophenol occured via catechol via nitrobenzene pathway. Specific o-nitrophenol biodegradation rates followed the Haldane model and the associated kinetic parameters were found as follows: Vmax ¼ 3.96 g o-nitrophenol g�1VSS�1d�1, Ks ¼ 198.12 mg L�1, and Ki ¼ 31.16 mg L�1. The aerobic granules proved to be a feasible and effective way to degrade o-nitrophenol containing wastewater.

Item Type:Citation Index Journal
Uncontrolled Keywords:aerobic granules, GC-MS, Haldane model kinetics, o-nitrophenol, sequencing batch reactor (SBR)
Subjects:T Technology > TD Environmental technology. Sanitary engineering
Academic Subject One:Academic Department - Civil Engineering - Water and environment - Environmental - Wastewater treatment
Departments / MOR / COE:Departments > Civil Engineering
ID Code:10774
Deposited By: Assoc Prof Dr Mohamed Hasnain Isa
Deposited On:16 Dec 2013 23:48
Last Modified:16 Dec 2013 23:48

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