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

作者：Basheer Farrukh^*; Isa M H; Farooqi I H

来源：Water Science and Technology, 2012, 65(12): 2132-2139.

DOI：10.2166/wst.2012.123

• aerobic granules
• GC-MS
• Haldane model kinetics
• o-nitrophenol
• sequencing batch reactor (SBR)

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: V-max = 3.96 g o-nitrophenol g(-1)VSS(-1)d(-1), K-s = 198.12 mg L-1, and K-i = 31.16 mg L-1. The aerobic granules proved to be a feasible and effective way to degrade o-nitrophenol containing wastewater.

• 出版日期2012