Study of sulfate-reducing ammonium oxidation process and its microbial community composition

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Dandan ZhangJiyan Liang

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 trad...Continue Reading

References

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Dec 14, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Weixing MiRixiang Zhao

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Citations

Oct 30, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Dandan ZhangJiyan Liang
Aug 5, 2021·The Science of the Total Environment·Carlos R Chan-PachecoGuillermo Quijano
Aug 15, 2021·The Science of the Total Environment·Valme JuradoCesareo Saiz-Jimenez

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