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High-rate nitrogen removal from livestock manure digester liquor by combined partial nitritation-anammox process
- Source :
- Biodegradation. 21(1)
- Publication Year :
- 2009
-
Abstract
- In this study, combination of a partial nitritation reactor, using immobilized polyethylene glycol (PEG) gel carriers, and a continuous stirred granular anammox reactor was investigated for nitrogen removal from livestock manure digester liquor. Successful nitrite accumulation in the partial nitritation reactor was observed as the nitrite production rate reached 2.1 kg-N/m(3)/day under aerobic nitrogen loading rate of 3.8 kg-N/m(3)/day. Simultaneously, relatively high free ammonia concentrations (average 50 mg-NH(3)/l) depressed the activity of nitrite oxidizing bacteria with nitrate concentration never exceeding 3% of TN concentration in the effluent of the partial nitritation reactor (maximum 35.2 mg/l). High nitrogen removal rates were achieved in the granular anammox reactor with the highest removal rate being 3.12 kg-N/m(3)/day under anaerobic nitrogen loading rate of 4.1 kg-N/m(3)/day. Recalcitrant organic compounds in the digester liquor did not impair anammox reaction and the SS accumulation in the granular anammox reactor was minimal. The results of this study demonstrated that partial nitritation-anammox combination has the potential to successfully remove nitrogen from livestock manure digester liquor.
- Subjects :
- Environmental Engineering
Denitrification
Nitrogen
chemistry.chemical_element
Bioengineering
Microbiology
Waste Disposal, Fluid
chemistry.chemical_compound
Bioreactors
Nitrate
Ammonia
Environmental Chemistry
Animals
Anaerobiosis
Nitrite
Nitrogen cycle
Nitrites
Nitrates
Waste management
Bacteria
technology, industry, and agriculture
equipment and supplies
Pulp and paper industry
Pollution
Manure
Biodegradation, Environmental
chemistry
Anammox
Animals, Domestic
Nitrification
Waste disposal
Subjects
Details
- ISSN :
- 15729729
- Volume :
- 21
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Biodegradation
- Accession number :
- edsair.doi.dedup.....5dc6013ffde5dfe272cc677110867948