title: Achieving nitritation and phosphorus removal in a continuous-flow anaerobic/oxic reactor through bio-augmentation.
abstract: The feasibility of achieving nitritation and phosphorus removal using bio-augmentation was investigated in a continuous-flow anaerobic/oxic (A/O) reactor treating sewage. The results indicated that nitritation could be quickly start-up, and reconstructed with an increase in the nitrite accumulation rate (NAR) from 1% to 89% within 15 days by using bio-augmentation and controlling DO at 0.96 mg/L. Biological phosphorus removal could be achieved with the average phosphorus removal efficiency of 96.43% when the NAR was maintained above 78.60%. Meanwhile, sludge settleablity was good with a sludge volume index (SVI) of between 62 and 102 mL/g even under high NAR. After nitritation and biological phosphorus removal were achieved, this A/O reactor has the potential to supply appropriate influent for the anammox UASB reactor.
authors: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China. mady7802@163.com
authors: Bin
authors: B
authors: Ma
authors: Shuying
authors: S
authors: Wang
authors: Shujun
authors: S
authors: Zhang
authors: Xiyao
authors: X
authors: Li
authors: Peng
authors: P
authors: Bao
authors: Yongzhen
authors: Y
authors: Peng
mesh_terms: D064751:Ammonium Compounds / Q000032:analysis; D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D019149:Bioreactors; D009566:Nitrates / Q000032:analysis; D058465:Nitrification; D009573:Nitrites / Q000032:analysis; D010758:Phosphorus / Q000302:isolation & purification*; D012212:Rheology; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid
chemical_list: D064751:Ammonium Compounds; D009566:Nitrates; D009573:Nitrites; D012722:Sewage; D010758:Phosphorus