Volatile Organic Compound (VOC) Control in Chemical Industry Wastewater using a Membrane Bioreactor (MBR)

Authors: Min, Kyungnan; Ergas, Sarina J.

Source: Proceedings of the Water Environment Federation, WEFTEC 2009: Session 81 through Session 90 , pp. 5764-5770(7)

Publisher: Water Environment Federation

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Abstract:

A lab-scale side-stream membrane bioreactor (MBR) was operated to reduce volatilization and enhance biodegradation of volatile organic compounds (VOCs) when treating chemical industry wastewater. Synthetic wastewater contains three VOCs of acetaldehyde, butyraldehyde and vinyl acetate. In Phase I, the organic loading rates were varied from 1.06 to 2.98 kg COD/m3/day. In Phase II, the dissolved oxygen (DO) concentrations were varied from 0.2 to 5.4 mg/L.

Total VOC removal rates were greater than 99.8 percent at all organic loading rates. Biomass stabilization status had a significant effect on volatilization rates. Under unstable conditions, 85 percent of vinyl acetate was volatilized, however under stable condition, tIlis volatilization rates were reduced to 0.8 percent for acetaldehdyde, 1.3 percent for butyraldehyde, and 0.6 percent for vinyl acetate. Regardless of the DO concentrations, total and biodegradation removal rates were greater than 99.7 and 95.9 percent. Increased volatilization rate was observed at higher DO concentrations.
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