Performance and microbial mechanism in sulfide-driven autotrophic denitrification by different inoculation sources in face of various sulfide and sulfate stress.
Bioresour Technol
; : 131443, 2024 Sep 04.
Article
em En
| MEDLINE
| ID: mdl-39241813
ABSTRACT
To develop a reliable sulfide (S2-) autotrophic denitrification (SAD) process under S2- and SO42- salinity stresses, the biofilm performance and microbial mechanisms were comparatively studied using different inocula of activated sludge (AS) and intertidal sediment (IS). Biofilm IS enriched more denitrification genes (0.34â¯%) and S2- oxidation genes (0.29â¯%) than those with AS. Higher denitrification performance was obtained under S2- (100â¯mg/L) and SO42- (5-15â¯g/L Na2SO4) stresses, but no significantly differences were observed under levels of 0-200â¯mg/L S2- and 30â¯g/L Na2SO4. Notably, biofilm samples in SAD systems with IS still had more S2- oxidation genes at high S2- levels of 100-200â¯mg/L and Na2SO4 level of 30 g/L. The key functional genus Thiobacillus accumulated well at 30 g/L Na2SO4, but was strongly inhibited at 200â¯mg/L S2-. The findings were advantage to SAD application under sulfide and salinity stresses.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2024
Tipo de documento:
Article
País de publicação:
Reino Unido