CHENHao-ran,LüLi-feng,WANGZong-ping,et al.Aerobic Activated Sludge for Degradation of Phenol Wastewater Based on Biological Co-metabolism[J].China Water & Wastewater,2023,39(17):99-105.
Aerobic Activated Sludge for Degradation of Phenol Wastewater Based on Biological Co-metabolism
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第17期
Page:
99-105
Column:
Date of publication:
2023-09-01
- Keywords:
- phenol wastewater; aerobic activated sludge; co?metabolism; sodium acetate; microbial diversity
- Abstract:
- Based on aerobic activated sludge system, sodium acetate was selected as co-metabolic substrate to investigate the biological co-metabolism performance of phenol wastewater. When the phenol concentration was high (1 000 mg/L), common aerobic activated sludge had a poor removal efficiency of phenol (less than 30%). Sodium acetate improved the removal efficiency of phenol, and the removal efficiency increased with the increase of dissolved oxygen （DO）. When DO reached (5.0±0.7) mg/L, the highest removal rate of phenol (84.17%) was obtained. High-throughput sequencing analysis showed that phenol reduced the microbial diversity and significantly affected the microbial community composition. However, the microbial diversity could not be improved by adding sodium acetate. In sludge samples from the phenol treatment process without adding sodium acetate, Azotobacter and Bdellovibrio were the dominant bacterial genera with relative abundances of 12.97% and 9.08%, respectively. While in the co-metabolic sludge samples,norank_f__Caldilineaceae,Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium, Propioniciclava and Ottowia were the dominant bacterial genera. Therefore, this paper develops a high efficiency and low cost phenol treatment process, which can provide a new idea for the degradation of phenol wastewater.
Last Update:
2023-09-01