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Exploring the role of heterotrophs in partial nitritation-anammox process treating thermal hydrolysis process - anaerobic digestion reject water
- Source :
- Bioresource Technology. 341:125762
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Heterotrophic bacteria (HB) are generally prevalent in anammox-based processes, but their functional and ecological roles in partial nitritation-anammox (PN/A) process treating high-organics wastewater remained unclear. This study aimed to elucidate HB activities and microbial interactions in a one-stage PN/A treating thermal hydrolysis process (THP) - anaerobic digestion (AD) reject water. The PN/A reactor achieved a satisfactory nitrogen removal rate of 0.58 ± 0.06 g N/(L·d), and around 12% of COD in the THP-AD reject water was removed. N2O emission factors of the PN/A reactor were 1.15% ± 0.18% treating synthetic wastewater, and 0.95% ± 0.06% treating reject water. A balanced symbiotic relationship was maintained between HB and functional groups (i.e., anammox bacteria and aerobic-ammonia-oxidizing bacteria) over the reactor operation. The relative abundances of Anaerolineae spp. clearly increased, while Denitratisoma, capable of denitrification, slightly decreased when treating THP-AD reject water. The preference for electron donors of heterotrophs explained discrepant growth trends.
- Subjects :
- Environmental Engineering
Denitrification
Nitrogen
Heterotroph
Bioengineering
Wastewater
Bioreactors
Ammonium Compounds
Anaerobiosis
Food science
Waste Management and Disposal
Sewage
biology
Renewable Energy, Sustainability and the Environment
Chemistry
Hydrolysis
Water
General Medicine
Thermal hydrolysis
biology.organism_classification
Anaerobic digestion
Microbial population biology
Anammox
Oxidation-Reduction
Bacteria
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 341
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....3f395baecd711a8584aa786553d96a52