Roles of nitrate recycling ratio in the A2/O - MBBR denitrifying phosphorus removal system for high-efficient wastewater treatment: Performance comparison, nutrient mechanism and potential evaluation

The GPS-X was used to simulate the denitrifying phosphorus removal in the A2/O.The improvement actions were obtained due to the simulation result.Moreover, the effect of denitrifying phosphorus removal was forecasted after the application of optimization and improvement. The prediction shows that: by adjusting the operating parameters such as SRT was adjusted to 15ds, the internal reflux ratio was adjusted to 300% and the external reflux ratio was adjusted to 100%,the denitrifying phosphorus removal in the A2/O was obviously increased. Therefore, the employment of GPS-X software in simulation and optimization can provide guidance for the operation and control in wastewater treatment plants.

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Kinetics Analysis of Anaerobic/Anoxic SBR Denitrifying Phosphorus Removal System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.113-116.1997 ◽

2010 ◽

Vol 113-116 ◽

pp. 1997-2002

Author(s):

Xin Xin Jiang ◽

Fang Ma ◽

Xiao Xin Zhang ◽

Jun Yin ◽

Li Wei

Keyword(s):

Phosphorus Removal ◽

Batch Reactor ◽

Kinetic Equations ◽

Metabolic Model ◽

Biological Phosphorus Removal ◽

Denitrifying Phosphorus Removal ◽

Batch Tests ◽

Biological Phosphorus ◽

Soluble Components ◽

Removal System

Kinetic equations of soluble components are analyzed in an anaerobic/ anoxic sequencing batch reactor (A/A SBR) enriched with denitrifying phosphorus removing bacteria (DPB) sludge. Mathematical model is established for denitrifying phosphorus removal process. The model is based on the simplification of the metabolic model for biological phosphorus removal by DPB. A proper set of kinetic parameters was calculated from the data obtained in the batch tests. The model was subsequently applied for the simulation of cycle behavior of soluble components in the A/A SBR. The results of the simulation indicated that the model can predict the concentration of each component for denitrifying phosphorus removal successfully.

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Effect of NO2--N Concentration on Denitrifying Phosphorus Accumulating of Nitrosation Denitrifying Phosphorus Accumulating Organisms

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.981 ◽

2013 ◽

Vol 774-776 ◽

pp. 981-986

Author(s):

Li Cheng Zhang ◽

Chun Rong Wu ◽

Qiang Liu ◽

Yang Yu ◽

Xiao Wei Liu

Keyword(s):

Phosphorus Removal ◽

Continuous Flow ◽

Phosphorus Uptake ◽

Denitrifying Phosphorus Removal ◽

N Concentration ◽

Removal System ◽

The Way

Separating NDPAOs from the continuous flow double sludge nitrosation denitrifying phosphorus removal system, purifying and preliminary identifying them, discussing the effect of NO2--N concentration on the performance of denitrifying phosphorus accumulating of NDPAOs by the way of pure training. The results showed that the identified organism Veillonella could treat NO2--N as electronic receptors when the NO2--N concentration was 60mg/L; when the NO2--N concentration raised to 65mg/L, phosphorus accumulating was not normal; the denitrifying was abnormal while the NO2--N concentration further raised to 70mg/L; when the NO2--N concentration was 80mg/L, characteristics of phosphorus uptake and denitrifying had suffered serious inhibition.

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