ZHANGXiang-lin,WANGYan-ping.Effect and Mechanism of Perfluorooctanoic Acid on Aerobic Granular Sludge Reactor[J].China Water & Wastewater,2024,40(19):87-93.
Effect and Mechanism of Perfluorooctanoic Acid on Aerobic Granular Sludge Reactor
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第19期
Page:
87-93
Column:
Date of publication:
2024-10-01
- Abstract:
- This paper established a laboratory?scale aerobic granular sludge (AGS) system to investigate the influence of an emerging contaminant, perfluorooctanoic acid (PF), on the operational efficiency of AGS, and explored the impacts of PF on the operational efficiency and microbial community characteristics of AGS at a medium temperature (35 ℃) through controlling the concentration of PF in the influent. Low concentrations of PF (less than 0.5 mg/L) had no significant influence on the operating efficiency of AGS and the microbial community. However, when the PF concentration exceeded 0.5 mg/L, the performances of AGS for removing pollutants and nutrients were weakened, particularly when the PF concentration was 4.0 mg/L. The effluent COD was as high as 36.5-38.2 mg/L, and the corresponding removal efficiency dropped to 74.9%-76.2%. PF reduced the sludge concentration and the proportion of organic matter, yet enhanced the sedimentation of granular sludge and stimulated the secretion of extracellular polymeric substance (EPS), particularly the secretion of protein, and augmented the protein/polysaccharide (PN/PS) ratio. Microbiological analysis revealed that PF reduced the relative abundance of phyla such as Proteobacteria and Chloroflexi, and the relative abundance of genera such as Plasticicumulans, Thauera and Zoogloea.
Last Update:
2024-10-01