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Sulfide inhibition of nitrite oxidation in activated sludge depends on microbial community composition
- Source :
- Water Research. 138:241-249
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Increasingly, technologies that use sulfide as an electron donor are being considered for nitrogen removal; however, our understanding of how sulfide affects microbial communities in nitrifying treatment processes is limited. In this study, we used batch experiments to quantify sulfide inhibition of both ammonium oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) using activated sludge from two full-scale treatment plants with distinct treatment processes. The batch experiments showed that NOB were more vulnerable to sulfide inhibition than AOB, and that inhibition constants (KI) for NOB were distinct between the two treatment plants, which also had distinct nitrite oxidizing microbial communities. A Nitrospira-rich, less diverse NOB community was inhibited more by sulfide than a more diverse community rich in Nitrotoga and Nitrobacter. Therefore, sulfide-induced nitritation may be more successful in less diverse, Nitrospira-rich communities. Additionally, sulfide significantly influenced the activity of non-nitrifying microbial community members, as measured by 16S rRNA cDNA sequencing. Overall, these results indicate that sulfide has a strong impact on both nitrification and the activity of the underlying microbial communities, and that the response is community-specific.
- Subjects :
- 0301 basic medicine
Environmental Engineering
Sulfide
Sulfides
010501 environmental sciences
Waste Disposal, Fluid
01 natural sciences
03 medical and health sciences
chemistry.chemical_compound
RNA, Ribosomal, 16S
Ammonium
Nitrite
Waste Management and Disposal
Nitrites
0105 earth and related environmental sciences
Water Science and Technology
Civil and Structural Engineering
chemistry.chemical_classification
Bacteria
Sewage
biology
Ecological Modeling
Nitrobacter
biology.organism_classification
Nitrification
Pollution
030104 developmental biology
Activated sludge
chemistry
Microbial population biology
Environmental chemistry
Sewage treatment
Oxidation-Reduction
Subjects
Details
- ISSN :
- 00431354
- Volume :
- 138
- Database :
- OpenAIRE
- Journal :
- Water Research
- Accession number :
- edsair.doi.dedup.....8b20d4a0c2ba4faea2d749c45ef49c7b