Membrane Science and Technology

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Optimization control of biological nitrogen and phosphorus removal in a A/O-MBR process

Authors： Zhengkai Rao1, Shifan Wei1

Units： Architectural design research institute of Guizhou,Guiyang, Guizhou,520002

KeyWords： membrane bioreactor; wastewater treatment; enhanced nitrogen and phosphorus removal; membrane fouling

ClassificationCode：TQ

year,volume(issue):pagination： 2013, 33(3):92-96

Abstract：

The lab-scale A/O-MBR process was utilized for wastewater nutrient removal by changing the cyclic strategies to enhance the nutrient removal. The results showed that the intermittent cyclic operation mode did not affect nitrification of the system,and the full-nitrification rate reached 99.4%. Comparing with the continuous cyclic mode, TP removal efficiency significantly increased from 57.98% to 81.5% significantly, with the effluent TP from 2.13 mg•L-1 to 0.98 mg•L-1; TN removal efficiency declined from 77.4% to 66.3%, with the effluent TN from 10.9 mg•L-1 to 15.8 mg•L-1 due to the shorter retention time in the anoxic reactor.Removal efficiency of organic matters was little affected by the cyclic mode and stabilized at around 91.9%.

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Reference：

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