Regenerative Energie
SUMMARY:
The leachate of landfill sites and effluents of anaerobic digestors and composting plants are characterized by unwanted high amounts of nitrogen and low carbon concentrations. The common elimination of nitrogen is mostly realized by nitrification and denitrification. To maintain the denitrification process most of the plants use acetic acid or methanol as the main electron acceptor. Due to the aeration during the nitrification process, the nitrogen removal becomes a highly energy consuming process.
Additionally, the carbon source increases the surplus sludge. The paper describes the plant optimization for the treatment of landfill leachate. By the stepwise reduction of added methanol and lowered aeration, high concentrations of Nitrite and Ammonia were detected in the activated sludge and the downstream activated carbon. During the changeover we measured the nitrogen species, COD and the hydraulic data of the plant. Additionally, the status of the bacteria responsible for the anaerobic ammonium oxidation (ANAMMOX) was monitored. The detection of bacteria was carried out by Fluorescence In Situ Hybridisation (FISH), which works highly specific and represents the bacteria in situ. We verified the ANAMMOX related bacteria in the activated sludge and the downstream activated carbon. Last but not least, ANAMMOX reduces the costs for methanol, energy and surplus sludge as well as the CO2 emissions of the plant.
| Copyright: | © European Compost Network ECN e.V. |
| Quelle: | Orbit 2006 (September 2006) |
| Seiten: | 5 |
| Preis: | € 0,00 |
| Autor: | PD Dr. rer. nat. Dr.-Ing. habil. Martin Denecke S. Buschmann U. Walter V. Reekers |
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© Lexxion Verlagsgesellschaft mbH (6/2025)
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© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (5/2025)
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