Relative abundance of bacteria involved in sulfide and methane oxidation detected by 16S rRNA gene amplicon sequencing in the bioreactors
| Abundance of bacteria (%)/phase (HRT) . | R-control . | R-air . | ||||||
|---|---|---|---|---|---|---|---|---|
| Biomass . | Sludge . | Biomass . | Sludge . | |||||
| 6 h . | 3 h . | 6 h . | 3 h . | 6 h . | 3 h . | 6 h . | 3 h . | |
| Sulfur bacteria | 0.58 | 3.15 | 0.88 | 7.2 | 0.82 | 5.18 | 1.28 | 0.73 |
| Non-sulfur bacteriaa | 64.92 | 69.95 | 35.54 | 17.67 | 62.84 | 40.28 | 11.02 | 48.25 |
| Sulfate-reducing bacteria | 0.19 | 0.10 | 0.20 | 1.68 | 0.14 | 1.69 | 0.33 | 0.17 |
| Methanotrophic bacteria | 1.2 | 0.42 | 0.64 | 0.14 | 2.18 | 0.20 | 0.14 | 0.05 |
| Abundance of bacteria (%)/phase (HRT) . | R-control . | R-air . | ||||||
|---|---|---|---|---|---|---|---|---|
| Biomass . | Sludge . | Biomass . | Sludge . | |||||
| 6 h . | 3 h . | 6 h . | 3 h . | 6 h . | 3 h . | 6 h . | 3 h . | |
| Sulfur bacteria | 0.58 | 3.15 | 0.88 | 7.2 | 0.82 | 5.18 | 1.28 | 0.73 |
| Non-sulfur bacteriaa | 64.92 | 69.95 | 35.54 | 17.67 | 62.84 | 40.28 | 11.02 | 48.25 |
| Sulfate-reducing bacteria | 0.19 | 0.10 | 0.20 | 1.68 | 0.14 | 1.69 | 0.33 | 0.17 |
| Methanotrophic bacteria | 1.2 | 0.42 | 0.64 | 0.14 | 2.18 | 0.20 | 0.14 | 0.05 |
aThis group comprises of sequences of phototrophic bacteria, including genera involved in sulfur oxidation (Garcia et al. 2017), organic acids and COD removal (Kim et al. 2004).