[Experimental study on the effect of COD/P ratios and phosphate recovery on a BNR system].
Based on a BNR system--BCFS, the effect of COD/P and phosphate recovery on the BCFS process was experimentally investigated. The results indicate that a higher P-removal efficiency (87%) and a good P-effluent quality (< or = 0.8 mg x L(-1)) could be maintained at COD/P ratios higher than 24. When COD/P was reduced below 24, the P-removal efficiency was suddenly decreased down to 62% and the P-effluent went up to 5 mg x L(-1). Under the circumstance, chemical phosphate recovery in the side-stream of anaerobic supernatant was combined with bio-P removal. When the side-stream increased up to 30%, the P-effluent went back to < 1 mg x L(-1), with a corresponding phosphate recovery efficiency of 54%.
Hao
Xiao-Di
XD
R & D Centre for Sustainable Environmental Biotechnology, Beijing University of Civil Engineering and Architecture, Beijing 100044, China. haoxiaodi@bucea.edu.cn
Dai
Ji
J
Hu
Yuan-Sheng
YS
Cao
Ya-Li
YL
D000693:Anaerobiosis; D019149:Bioreactors; D002244:Carbon / Q000032:analysis*; D009930:Organic Chemicals / Q000032:analysis; D010758:Phosphorus / Q000032:analysis* / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid / Q000379:methods*
D009930:Organic Chemicals; D010758:Phosphorus; D002244:Carbon