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Achieve efficient nitrogen removal from real sewage in a plug-flow integrated fixed-film activated sludge (IFAS) reactor via partial nitritation/anammox pathway
- Source :
- Bioresource Technology. 239:294-301
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- This study tested the feasibility of plug-flow integrated fixed-film activated sludge (IFAS) reactor in applying sewage partial nitritation/anammox (PN/A) process. The IFAS reactor was fed with real pre-treated sewage (C/N ratio = 1.3) and operated for 200 days. High nitrogen removal efficiency of 82% was achieved with nitrogen removal rates of 0.097 ± 0.019 kg N/(m3·d). Therefore, plug-flow IFAS reactor could be an alternative to applying sewage PN/A process. Besides, it was found that the stability of sewage PN/A process was significantly affected by residual ammonium. Nitrate accumulated in effluent and PN/A performance deteriorated when residual ammonium was below 1 mg/L. On the contrary, long-term stable PN/A operation was achieved when residual ammonium was over 3 mg/L.
- Subjects :
- Environmental Engineering
Nitrogen
0208 environmental biotechnology
Sewage
Bioengineering
02 engineering and technology
010501 environmental sciences
01 natural sciences
Nitrogen removal
chemistry.chemical_compound
Bioreactors
Nitrate
Ammonium Compounds
Ammonium
Waste Management and Disposal
Effluent
0105 earth and related environmental sciences
Plug flow
Waste management
Renewable Energy, Sustainability and the Environment
Chemistry
business.industry
General Medicine
020801 environmental engineering
Activated sludge
Anammox
Denitrification
business
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 239
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....900dce0657efa6de22fe8b15f6cd4f94