YANGJing-yue.Effect of Sodium Acetate on ANAMMOX Coupled Denitrification System with Sufficient Nitrite Nitrogen[J].China Water & Wastewater,2023,39(17):93-98.
Effect of Sodium Acetate on ANAMMOX Coupled Denitrification System with Sufficient Nitrite Nitrogen
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第17期
Page:
93-98
Column:
Date of publication:
2023-09-01
- Keywords:
- anaerobic ammonia oxidation (ANAMMOX); denitrification; sodium acetate; nitrite nitrogen; microbial community
- Abstract:
- This paper investigated the effect of sodium acetate on continuous-flow anaerobic ammonia oxidation (ANAMMOX) coupled denitrification system (SAD) under the condition of sufficient nitrite nitrogen. When the concentration of sodium acetate (COD) was 20 mg/L, satisfactory nitrogen removal performance of the coupled system was obtained. When the concentration of sodium acetate was increased to 50 mg/L, ANAMMOX was severely inhibited, and the nitrogen removal performance of the system was significantly affected. The change in microbial community of the granular sludge was further analyzed by high-throughput sequencing. With the increase of sodium acetate concentration, the relative abundance of Candidatus Kuenenia which was the main ANAMMOX bacteria (AAOB) in granular sludge, decreased from 20.42% to 2.30%, the biological density of AAOB gradually decreased, and the biological density of denitrifying bacteria gradually increased, indicating that the ANAMMOX bacteria was disadvantageous in the system.
Last Update:
2023-09-01