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DOI : ,    Vol.4, No.2, 49 ~ 59, 1996
Title
Effects of Anaerobic Conditons on Biologlcal Phosphorus Removal and Sludge Settleability
이성기Seong Key Lee,송영일Young Il Song
Abstract
The effects of anaerobic conditions on Biological Phosphorus Removal and sludge settleability in Anaerobic-Oxic(AO) Process have been studied. Ten systems with different anaerobic configurations and various anaerobic retention time were operated. It has been observed that the growth of some filamentous organisms was suppressed under three-compartment anaerobic cascades as results of more soluble COD reduction and substrate gradient in anaerobic zone. It has been observed that anaerobic retention time should be long enough to reduce soluble COD to penetrate into aerobic zone. Longer anaerobic retention time such as 3 and 5 hours resulted in good phosphorus removal efficency. It was observed that the highest phosphorus removal efficency was obtained in reactor 2 with anaerobic time 3hours in the batch experient. In those systems without anaerobic cascade, severe filamentous bulking took place, even though the anaerobic retention time were similar to those of cascade systems.
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