DONGJia-chen,HULan-lan,LUYin,et al.Acclimation of Feammox Sludge and Its Simultaneous Removal of Nitrogen and Phosphorus[J].China Water & Wastewater,2024,40(11):1-7.
Acclimation of Feammox Sludge and Its Simultaneous Removal of Nitrogen and Phosphorus
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第11期
Page:
1-7
Column:
Date of publication:
2024-06-01
- Keywords:
- Feammox; nitrogen and phosphorus removal; vivianite; low C/N ratio
- Abstract:
- Feammox, an iron-dependent anaerobic ammonium oxidation (Anammox), might be developed as a novel anaerobic technology for simultaneous removal of nitrogen and phosphorus because ferric salts are commonly used chemicals for phosphate removal. Based on this hypothesis, the acclimation of Feammox sludge and its simultaneous removal of nitrogen and phosphorus were investigated. Compared with anaerobic digestion sludge, Anammox sludge was more suitable being used as the inoculated sludge. Simultaneous removal of nitrogen and phosphorus from low C/N ratio wastewater was successfully achieved in a continuous flow reactor inoculated with Anammox sludge. In the stable operation stage, the removal rate of ammonium was approximately 40%-60%, of which 72% of the removed ammonium was converted to N2，and the removal rate of phosphate was about 40%. The formation of ferrous and the oxidation of ammonium indicated the existence of Feammox. Ferrous formed in Feammox induced the crystallization of vivianite, which indicated that vivianite crystallization was also a pathway for phosphate removal in addition to phosphate removal via ferric salts.
Last Update:
2024-06-01