Vertical baffled reactor promoting aerobic sludge concentration for effective remediating unstable–load domestic wastewater: Performance, microbial properties and mechanism
- DOI码：10.1016/j.jwpe.2024.104826
- 所属单位：吉林大学
- 发表刊物：Journal of Water Process Engineering
- 关键字：Unstable–load wastewater
Continuous flow
Vertical baffled reactor
High–concentration aerobic granular sludge
Microbial community
- 摘要：The study evaluated the pollutant degradation ability and the microbial community of aerobic granular sludge
(AGS) in the modified vertical baffle reactors (VBRs) in the treatment of unstable–load domestic wastewater. The
AGS was cultivated in the reactor which was ensured by the special structure and sludge reflux system of VBRs.
VBRs can maintain a high sludge concentration without sludge bulking, while long hydraulic retention time
(HRT) ensured a high sludge concentration to improve the treatment capacity to unstable influent. Unstable–load
domestic wastewater, with COD = 120–556 mg/L, TN = 19.97–81.54 mg/L, was applied as the influent for 180
days of continuous experiments, while the system achieved a stable removal effect on the indicator pollutants. On
day 180, MLSS maintained at 7000 mg/L with the average particle size of sludge at 1000 μm. The increasing
concentration of extracellular polymeric substances (EPS), especially polysaccharide (PS) was conducive to the
bridging among particles to form AGS, which played an important role in maintaining the stability of granular
sludge. The results of functional microbial communities showed that Proteobacteria was the most abundant
phylum in aerobic sludge, while the Nitrospira was the dominant bacteria in genus level. The microbial community
was biodiverse, and can achieve the effect of the simultaneous removal of multiple contaminants.
- 论文类型：期刊论文
- 卷号：58
- 页面范围：104826
- 是否译文：否
- 发表时间：2024-02-23
- 收录刊物：SCI
- 发布期刊链接：https://doi.org/10.1016/j.jwpe.2024.104826
附件：
论文1.pdf
