Study on Phosphorus Removal Efficiency of a Continuous Influent Biofilm Reactor (CIBFR) Based on Intermittent Aeration and Rich Phosphorus Wastewater Return

Abstract

To overcome the low efficiency of phosphorus removal in the continuous influent biofilm, the continuous influent biofilm reactor (CIBFR) which based on intermittent aeration, rich phosphorus wastewater return and commutative influent was proposed in this study. The effects of dissolved oxygen(DO), volume loading (Nv) and the intermittent aeration on phosphorus removal of the CIBFR were investigated when the intermittent aeration was anaerobic 3h-aeration 6h, the temperature=20¿, DO=5.5 mg•L-1. When the influent COD was 280 mg•L-1 and influent PO43--P was 3.1 mg•L-1, the removal rates of COD and PO43--P were 72.9% and 78.5%.