Submerged bed versus unsaturated flow reactor: A pressurized hydrogenotrophic denitrification reactor as a case study
| Autor: | Razi Epsztein, Michal Green, Sheldon Tarre, Michael Beliavski |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Denitrification Health Toxicology and Mutagenesis 0208 environmental biotechnology Flow (psychology) chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Bioreactors Mass transfer Environmental Chemistry Effluent 0105 earth and related environmental sciences Mass transfer coefficient Suspended solids Public Health Environmental and Occupational Health Environmental engineering General Medicine General Chemistry Pollution Nitrogen 020801 environmental engineering chemistry Biofilms |
| Zdroj: | Chemosphere. 161:151-156 |
| ISSN: | 0045-6535 |
| Popis: | The paper compares the main features of a submerged bed reactor (SuBR) with bubbling and recirculation of gas to those of an unsaturated flow reactor (uSFR) with liquid recirculation. A novel pressurized closed-headspace hydrogenotrophic denitrification system characterized by safe and economic utilization of H 2 gas was used for the comparison. Under similar conditions, denitrification rates were lower in the SuBR as a result of a lower effective biofilm surface area and overall gas-liquid mass transfer coefficient k L a . Similar values of effluent DOC were achieved for both reactors, although effluent suspended solids concentration of the SuBR were substantially higher. On the other hand, the required cleaning frequency in the SuBR was 2.5 times lower. Moreover, the SuBR is expected to reduce the recirculation energy consumption by 0.35 kWh/m 3 treated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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