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Nitrogen Removal Using Combined Ultracompact Biofilm Reactor-Packed Bed System
- Source :
- Journal of Environmental Engineering. 129:43-51
- Publication Year :
- 2003
- Publisher :
- American Society of Civil Engineers (ASCE), 2003.
-
Abstract
- A predenitrification system consisting of an ultracompact biofilm reactor (UCBR) and a packed bed column was used for removing nitrogen from synthetically simulated wastewater. The UCBR column was maintained under aerobic conditions to favor nitrification process, while the packed bed column was operated under an anoxic environment for denitrification process. A peristaltic pump was used to recycle fluid between the anoxic-packed bed and aerobic-UCBR columns to facilitate nitrogen removal. Five recycle ratios (R) were investigated, namely, 3, 4, 5, 6, and 10. The highest average total nitrogen (TN) removal rate was achieved at R=4. The NH4+-N, TN, and chemical oxygen demand (COD) removal rates at this R were 0.56±0.05kg NH4+-N/m3/day, 0.39±0.09kg TN/m3/day, and 1.83±0.18kg COD/m3/day, respectively. It was noted that poor nitrification in the UCBR was accompanied by a corresponding reduction in overall TN removal efficiency. This observation suggested that nitrification process was the limiting step for TN...
- Subjects :
- Packed bed
Environmental Engineering
Chromatography
Denitrification
Chemistry
Chemical oxygen demand
Analytical chemistry
chemistry.chemical_element
Anoxic waters
Nitrogen
Bioreactor
Environmental Chemistry
Nitrification
General Environmental Science
Civil and Structural Engineering
Waste disposal
Subjects
Details
- ISSN :
- 19437870 and 07339372
- Volume :
- 129
- Database :
- OpenAIRE
- Journal :
- Journal of Environmental Engineering
- Accession number :
- edsair.doi...........fb8494a8cf4d25911e702b425cb616e2