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High-rate nitrogen removal in a continuous biofilter anammox reactor for treating low-concentration nitrogen wastewater at moderate temperature
- Source :
- Bioresource Technology. 337:125496
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- The high-rate nitrogen removal in a continuous biofilter anammox reactor (CBAR) was investigated to treat low-concentration nitrogen wastewater. Shortening hydraulic retention time (HRT) gradually could restart CBAR and accumulate anammox bacteria effectively in the reactor, where the carmine anammox granular sludge and biofilm were coexisted well. It spent 21 days to restart CBAR completely after it had been idle for 116 days. Meanwhile, the total nitrogen removal rate remained stable at 86.42% accompanied with a total biomass concentration of 26.02 g-SS/L in 0 ~ 20 cm zone under nitrogen loading rate of 4.25 ± 0.10 kg-N/(m3·day), HRT of 20 min and 25 ℃. In addition, the specific anammox activity of biomass exceeded 0.28 g-N/(g-VSS·day) in 0 ~ 20 cm zone, which was related with a high relative abundance of Candidatus Brocadia (>30%) in the same zone. Thus, it is a feasible approach to adopt CBAR to treat low-concentration nitrogen wastewater efficiently.
- Subjects :
- Environmental Engineering
Sewage
Hydraulic retention time
Nitrogen
Renewable Energy, Sustainability and the Environment
Chemistry
Temperature
Biomass
chemistry.chemical_element
Bioengineering
General Medicine
Wastewater
Pulp and paper industry
Nitrogen removal
Moderate temperature
Bioreactors
Anammox
Ammonium Compounds
Biofilter
Denitrification
Anaerobiosis
Oxidation-Reduction
Waste Management and Disposal
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 337
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....63db9cf1fbcf5fa5e96bff346785c75b