FU Kun-ming,FU Si-bo,QIU Fu-guo.Theoretical Analysis of Oxygen and Carbon Source Demand under Different Biological Nitrogen Removal Pathways[J].China Water & Wastewater,2021,37(10 10):8-15.
Theoretical Analysis of Oxygen and Carbon Source Demand under Different Biological Nitrogen Removal Pathways
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
10 10
Page:
8-15
Column:
Date of publication:
2021-05-17
- Keywords:
- biological nitrogen removal; nitrification; short-cut nitrification; denitrification; anaerobic ammonium oxidation
- Abstract:
- Biological nitrogen removal is an energy-efficient, resource-saving, and eco-friendly process for nitrogen removal. However, pathways involved in biological nitrogen removal are numerous and complex, which means that finding the right pathway to fulfill biological nitrogen removal under different conditions has become a key issue. In this paper, a theoretical analysis regarding the specific feature of each pathway is conducted based on chemical/biochemical equation, including complete nitrification + complete denitrification, short-cut nitrification + short-cut denitrification, short-cut nitrification + anaerobic ammonium oxidation, and complete nitrification + partial denitrification + anaerobic ammonium oxidation. The theoretical consumption of oxygen demand, carbon source, and alkalinity as well as sludge production of each pathway were calculated and evaluated. Compared with the complete nitrification + complete denitrification pathway, the short-cut nitrification + anaerobic ammonium oxidation pathway (CANON) can save 56% O2, 100% BOD5, and 44% alkalinity, and reduce 81% excess sludge production; 42% O2, 77% BOD5 were saved and 63% excess sludge production was reduced by the complete nitrification + partial denitrification + anaerobic oxidation pathway.
Last Update:
2021-05-17