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Enrichment and adaptation yield high anammox conversion rates under low temperatures
- Source :
- Bioresource technology, Bioresource Technology, Bioresource Technology, Elsevier, 2018, 250, pp.505-512. ⟨10.1016/j.biortech.2017.11.079⟩, Bioresource Technology, 2018, 250, pp.505-512. ⟨10.1016/j.biortech.2017.11.079⟩
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- This study compared two anammox sequencing batch reactors (SBR) for one year. SBRconstantT was kept at 30 degrees C while temperature in SBRloweringT was decreased step-wise from 30 degrees C to 20 degrees C and 15 degrees C followed by over 140 days at 12.5 degrees C and 10 degrees C. High retention of anammox bacteria (AnAOB) and minimization of competition with AnAOB were key. 5-L anoxic reactors with the same inoculum were fed synthetic influent containing 25.9 mg NH4+-N/L and 34.1 mg NO2--N/L (no COD). Specific ammonium removal rates continuously increased in SBRconstantT, reaching 785 mg NH4+-N/gVSS/d, and were maintained in SBRloweringT, reaching 82.2 and 91.8 mg NH4+-N/gVSS/d at 12.5 and 10 degrees C respectively. AnAOB enrichment (increasing hzsA and 16S rDNA gene concentrations) and adaptation (shift from Ca. Brocadia to Ca. Kuenenia in SBRloweringT) contributed to these high rates. Rapidly settling granules developed, with average diameters of 1.2 (SBRconstantT) and 1.6 mm (SBRloweringT). Results reinforce the potential of anammox for mainstream applications.
- Subjects :
- [SDV.BIO]Life Sciences [q-bio]/Biotechnology
Environmental Engineering
Denitrification
Nitrogen
Microorganism
0208 environmental biotechnology
chemistry.chemical_element
bioréacteur
Bioengineering
02 engineering and technology
010501 environmental sciences
Biology
01 natural sciences
chemistry.chemical_compound
Bioreactors
Ammonium Compounds
séquençage
Bioreactor
Ammonium
biological nitrogen removal
Waste Management and Disposal
shortcut nitrogen removal
0105 earth and related environmental sciences
bactérie
Renewable Energy, Sustainability and the Environment
Physics
Temperature
Environmental engineering
General Medicine
bacterium
cold anammox
Anoxic waters
réacteur anaérobie
020801 environmental engineering
Activated sludge
chemistry
microbial community structure
Anammox
Oxidation-Reduction
Engineering sciences. Technology
Nuclear chemistry
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 250
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....3d5e0942e0fa8dfaa214b78c9c6f7561