Effect of MLSS on Nitrosation Denitrifying Phosphorus Removal System

Abstract:

The influence of MLSS on nitrosation denitrifying phosphorus removal (NDPR) process was investigated through the experiments of anaerobic-anoxic NDPR and anoxic NDPR. Experimental results show that the higher MLSS is, the bigger COD removal rate is, and the higher the rates of anaerobic phosphorus release and anoxic phosphorus absorption are. Low carbon sewage will easily lead to insufficient inner carbon source in the system with high MLSS. High concentration of carbon source in the raw water with high MLSS will bring considerable difficulties to returned sludge and sludge treatment. Moreover, excessive MLSS will result in phosphorus release in the later anoxic stage, and lower MLSS can prolong the time of denitrification and phosphorus removal. The system with 5200 mg/L MLSS has the best effect of nitrogen and phosphorus removal.

• Periodical: Advanced Materials Research (Volume 777)
• Pages: 303-308
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.777.303
• Online since: September 2013
• Authors: Li Cheng Zhang, Qiang Liu, Yu Lan, Yang Yu
• Keywords: Concentration of NO₂^--N, Concentration of PO₄^3--P, MLSS, Nitrosation Denitrifying Phosphate-Accumulating Organisms (NDPAOs), Nitrosation Denitrifying Phosphorus Removal (NDPR)

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