COD removal and phosphorus conversion in a UASB-aerobic reactor system
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Date
1997
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Publisher
University of New Brunswick
Abstract
This study involved the laboratory operation of a biological wastewater treatment system which
combined anaerobic and aerobic processes. A synthetic industrial waste was treated for the
removal of COD and the conversion of phosphorus using a UASB (Upflow Anaerobic Sludge
Blanket) reactor in series with an aerobic reactor. The aspects examined ,in this study included the
efficiency of the system to remove COD and convert phosphorus as well as the effects of the
processes on the aerobic biomass.
A synthetic waste containing 1400 mg/L of COD and 2.18 mg/L of total phosphorus was used as
feed for the experiment. At an organic loading of 2.1 kg COD/m3d (based on the UASB reactor
volume), the UASB-aerobic reactor system as a whole removed more than 90% of COD and 75%
total phosphorus. The system is capable of exceeding these removal efficiencies but had not yet
reached steady state at the end of this 136 day experiment.