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- W4296905214 abstract "Nitrogen and sulfur coexisted in many kinds of wastewaters, which could be simultaneously removed in the Anammox coupled sulfide-denitrification process. In this study, the pH suitable for the coupling process was analyzed in a biofilter. The results showed that the coupling process could operate normally at pH of 6.5–8.5, with the total nitrogen removal efficiency (TNRE) higher than 85.0 %. At pH 7.5, the TNRE reached the highest, the hydroxylamine oxidoreductase (HAO) activity and heme-c reached 0.998 EU·g −1 SS and 0.0010 mmol·g −1 SS, respectively, with the hzo and nosZ gene concentrations as 4.6 × 10 8 and 9.7 × 10 7 copies·mL −1 . At pH 6.0, the process was significantly deteriorated and it secreted more protein to resist the pH shock, the TNRE was 34.0 %, HAO, hzo and nosZ genes and abundance of Candidatus_Kuenenia decreased by 2.8, 4.2, 2.2, and 1.4 times, respectively. Thiobacillus reduced nitrate to nitrite and supplied for Candidatus_Kuenenia , but utilized nitrite in adverse environment. • The Anammox coupled sulfide-denitrification process could run normally at pH 6.5–8.5. • Simultaneous nitrogen and sulfur removal was achieved using the coupling process. • The nitrogen removal, HAO, hzo and nosZ genes all decreased under low pH (6.0). • The secretion of heme-c increased in harsh environment. • The pH decrease from 7.5 to 6.5 mainly inhibited sulfide-denitrification." @default.
- W4296905214 created "2022-09-24" @default.
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- W4296905214 date "2022-10-01" @default.
- W4296905214 modified "2023-10-16" @default.
- W4296905214 title "Simultaneous nitrogen and sulfur removal using Anammox coupled sulfide-denitrification process: Impact of pH" @default.
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- W4296905214 doi "https://doi.org/10.1016/j.jwpe.2022.103176" @default.
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