CUITao,LISheng,TIANMin,et al.Evaluation of Nitrogen and Phosphorus Removal Performance in an Oxidation Ditch Based A2/O Process[J].China Water & Wastewater,2022,38(7):75-79.
Evaluation of Nitrogen and Phosphorus Removal Performance in an Oxidation Ditch Based A2/O Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第7期
Page:
75-79
Column:
Date of publication:
2022-04-01
- Keywords:
- oxidation ditch based A2/O process; nitrogen and phosphorus removal; nitrifying bacteria; phosphorus accumulating organisms (PAO)
- Abstract:
- The removal of nitrogen and phosphorus along the process, the activity of nitrification, phosphorus accumulation and phosphorus release of sludge in an oxidation ditch based A2/O process and a typical A2/O process in a municipal wastewater treatment plant in Xi’an were measured, and the performances of the two processes for nitrogen and phosphorus removal were compared by fluorescence in situ hybridization（FISH）. In the oxidation ditch based A2/O process, the nitrification activity of sludge was higher, and significant simultaneous nitrification and denitrification took place in the aerobic tank, indicating that higher nitrogen removal performance was obtained. The abundance, activity and phosphorus removal capacity of phosphorus accumulating organisms（PAO） in sludge from the oxidation ditch based A2/O process were similar to those from the typical A2/O process. As a new municipal wastewater denitrification and phosphorus removal process, oxidation ditch based A2/O process has the value for extension and application.
Last Update:
2022-04-01