电解强化人工湿地对农村生活污水中氮磷的去除性能

采用电解强化-三级串联潜流人工湿地的组合工艺,深化处理农村生活污水中的氮、磷营养盐.探究了系统对农村生活污水中氮、磷的净化效果,测定了填料对磷的吸附贡献及其磷的形态,采用高通量测序的方法分析了基质微生物的群落结构.结果 表明:当水力负荷为0.30 m3·(m2·d)-1时,电解系统对TN、NH4+-N和TP去除率分别为...

Performance of electrolysis enhanced constructed wetland system on nitrogen and phosphorus removal of rural domestic sewage

The combined process of electrolysis enhanced-three-stages subsurface flow constructed wetlands (E-HFCWs) was used to deepen the treatment of nitrogen and phosphorus nutrients in rural domestic sewage. The nitrogen and phosphorus purification efficiency of rural domestic sewage by the system were explored, the contribution of fillers to phosphorus adsorption and the phosphorus forms were determined, and the microbial community structure of the matrix microorganisms was analyzed by high throughput sequencing. The results showed that, at the hydraulic load of 0.30 m3·(m2·d)−1, the removal efficiencies of TN, ${rm{NH}}_4^{rm{ + }}$-N and TP by the electrolytic system were (92.99±4.51)%, (95.22±3.04)% and (93.13±5.22)%, respectively. The contribution rate of the adsorption and precipitation of the fillers to the phosphorus removal was higher than 70%, and phosphorus forms were mainly Al-P and Fe-P. There were 10 common dominant bacteria in all levels of wetlands at the phylum classification level, of which the relative abundance of Proteobacteria, Bacteroides, Patescibacteria, Chloroflexi and Firmicutes were higher than 80%, they played a major role in nitrogen removal in the system. E-HFCWs could remove nitrogen and phosphorus from rural domestic sewage efficiently.