Separation of organic matter from domestic sewage in a UASB-ABF system with anoxic bio-flocculation
| Autor: | Hang-Bae Jun, Dong-Jie Tian, Jin Chung, Jun-Sang Lee, Hyun-Sook Lim |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Denitrification
Chemistry 0208 environmental biotechnology Chemical oxygen demand Environmental engineering Ocean Engineering 02 engineering and technology Pulp and paper industry Pollution Anoxic waters 020801 environmental engineering Anaerobic digestion Activated sludge Sewage treatment Energy source Effluent Water Science and Technology |
| Zdroj: | Desalination and Water Treatment. 57:620-628 |
| ISSN: | 1944-3986 1944-3994 |
| DOI: | 10.1080/19443994.2015.1046722 |
| Popis: | An anoxic sewage treatment process, an upflow anaerobic sludge blanket (UASB) followed by an aerated bio-filter (ABF), was investigated for the reduction of oxygen demand and the separation efficiency of the organic matter. After recycling the nitrified effluent, complete denitrification occurred in the UASB, with an enhancement in both turbidity characteristics and TCOD removal rates. Low turbidity and COD in the effluent of the UASB reduced the oxygen demand and improved the nitrification efficiency in the subsequent ABF. Both with and without the recycling of the nitrified effluent in the UASB, 95 and 63% of the TCOD values, respectively, were removed. Compared with a conventional activated sludge system, approximately 11.74% of the TCOD was converted to CO2 in both the UASB and the ABF, generating an approximately 60% reduction in the amount of CO2. After accumulation in the UASB, 84% of the influent TCOD could be sequestered for use as a marginal energy source in a subsequent anaerobic digester. |
| Databáze: | OpenAIRE |
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