厌氧氨氧化菌
蛋白质细菌
反硝化细菌
化学
流出物
环境化学
铵
酸杆菌
硝化作用
硫酸盐
反硝化
制浆造纸工业
亚硝基单胞菌
氯仿(类)
氮气
环境工程
环境科学
生物化学
有机化学
工程类
基因
16S核糖体RNA
作者
Dandan Zhang,Li Cui,Hui Wang,Jiyan Liang
摘要
Abstract In this study, the simultaneous removal of ammonium and sulfate was detected in a self-designed circulating flow reactor, in which ammonium oxidization was combined with sulfate reduction. The highest removal efficiencies of NH4+-N and SO42–S were 92% and 59.2%. NO2− and NO3− appeared in the effluent, and experimental studies showed that increasing the proportion of N/S in the influent would increase the NO2− concentration in the effluent. However, N/S [n(NH4+-N)/n(SO42–S)] conversion rates during the experiment were between 2.1 and 12.9, which may have been caused by the experiment's complex process. The microbial community in the sludge reactor included Proteobacteria, Chloroflexi, Bacteroidetes, Chlorobi, Acidobacteria and Planctomycetes after 187 days of operation. Proteobacteria bacteria had a more versatile metabolism. The sulfate-reducing ammonium oxidation (SRAO) was mainly due to the high performance of Proteobacteria. Nitrospirae has been identified as the dominant functional bacteria in several anammox reactors used for nitrogen removal. Approximately 12.4% of denitrifying bacteria were found in the sludge. These results show that a portion of the nitrogen was converted by nitrification-denitrification, and that traditional anammox proceeds simultaneously with SRAO.
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