CLONIC: CLOSING THE NITROGEN CYCLE FROM LANDFILL LEACHATES. A BIOLOGICAL PROCESS WITH PARTIAL NITRITATION AND ANAMMOX FOLLOWED BY THERMAL DRY TREATMENT.
CESPA, being part of the Ferrovial Group, is a leader in waste management and urban services in Spain. CESPA has a long experience in landfill construction and management, having a total of 37 landfills either in property or in exploitation. As one of the legal and environmental requirements, a suitable leachate treatment must be applied before the discharge to the receiving media. Thus, the decision to choose for an specific leachate treatment depends on different parameter such as: the landfill site location, physical location of the leachate treatment plant, the leachate quality, the discharge requirements and the best technologies available.
Urban landfill leachates are characterized by high ammonium concentrations, elevated amounts of organic matter with very low biodegradable fraction, and high salinity. Treatments based on a partial biological autotrophic oxidation of ammonium to nitrite (PANISBR process), followed by an autotrophic anaerobic ammonium oxidation via nitrite (Anammox process), were studied as a more sustainable and cheaper alternative for the nitrogen removal from urban landfill leachates. After that thermal dry treatment, using biogas’s landfill combustion, was applied in order to keep all the salinity in the solid powder produced. This innovative biological treatment allowed the reduction of 98% of initial ammonium from leachate. Then, after drying the effluent obtained of this process, the environmental cost decreased an 48%. Both combined processes, PANI-SBR-ANAMMOX with THERMAL DRY, represent a technical, economical and environmental alternative for leachate treatment with important advantages of present treatments.
| Copyright: | © IWWG International Waste Working Group | |
| Quelle: | Specialized Session E (Oktober 2007) | |
| Seiten: | 10 | |
| Preis inkl. MwSt.: | € 0,00 | |
| Autor: | M.T. Vives  E. González Helio López Ramón Ganigué Dolors Balaguer | |
| Artikel weiterleiten | Artikel kostenfrei anzeigen | Artikel kommentieren |
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