Biodegradation of high strength phenolic wastewater using SBR.
This investigation demonstrates the capability of a bench-scale sequencing batch reactor (SBR) to biodegrade an inhibitory substrate at a high loading rate. A SBR loading rate of 3.12 kg phenol.m3 d-1 (2.1 g COD.g-1 MLVSS d-1) with a COD removal efficiency of 97% at a SRT of 4 days and a HRT of 10 hours was achieved; this rate was not reached before. The SBR was operated at 4 hours cycle, including 3 hours react phase. The synthetic wastewater of 1300 mg/L phenol was the sole carbon source. Oxygen uptake rates (OUR) were monitored in-situ at various stages of the SBR. The oxygen mass transfer coefficient, KLa, of 12.6 h-1 was derived from respirometry. Use of respirometry in SBR aided the tracking of the soluble substrate through OUR.
Yoong
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Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, QLD 4350, Australia. yoong@usq.edu.au
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D000332:Aerobiosis; D001673:Biodegradation, Environmental; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology; D007220:Industrial Waste; D010101:Oxygen Consumption; D019800:Phenol / Q000302:isolation & purification* / Q000378:metabolism; D014835:Volatilization; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000378:metabolism
D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D019800:Phenol