藻类
反硝化细菌
胞外聚合物
绿藻门
绿藻
生物
氮气
化学
植物
环境化学
微生物学
反硝化
细菌
生物膜
遗传学
有机化学
作者
Yingying Zhou,Yuanhang Zhou,Siqin Chen,Niuniu Guo,Ping Xiang,Shutao Lin,Yun Bai,Xueli Hu,Zhang Zhi
标识
DOI:10.1016/j.biortech.2022.128165
摘要
Algal-bacterial granular sludge (ABGS) and bacterial granular sludge (BGS, control group) were operated over 240 days to investigate the role of algae in treating synthetic municipal wastewater. The results showed that algae significantly improved the removal efficiency of total nitrogen (TN). The nitrogen removal load of ABGS was 2.6 mg-N/g-VSS/day (22.8 %, light) and 1.1 mg-N/g-VSS/day (9.6 %, dark) higher than that of BGS, respectively, which was attributed to algae enhanced NH3-N removal capacity in the anaerobic stage and increased the utilization efficiency of organics in denitrification. Algae increased the relative abundance of denitrifying bacteria, and ABGS (28.83 %) was higher than BGS (14.28 %). Moreover, the dominant phylum of algae was Chlorophyta (98.39 %), the chlorophyll-a was sustained at 1.28 ± 0.26 mg/g-VSS. Algae significantly increased the content of extracellular polymeric substances (EPS), and the increased polysaccharide came from the tightly bound EPS. This study expands the understanding of the role of algae in ABGS.
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