Dutch sustainable landfill research program: five years experience with the bioreactor test cell.

The project Sustainable Landfilling (NL) aims to assess the feasibility of three sustainable concepts, one of them is the bioreactor concept dominated by organic waste. The (anaerobic and aerobic) flushing bioreactor pilot in Landgraaf has been in operation five years and has additionally been simulated in a biological degradation and flushing model. The release of nitrogen seems to be delayed by the intermediate fixation in the form of biomass and stagnant zones. Because of the strict standards for the allowable nitrogen concentration from the viewpoint of emission control, the development of the nitrogen concentration is considered to be the main limiting factor to achieve final storage quality (FSQ) within the acceptable time-frame. Therefor the research has been extended to nitrification of the leachate recirculation flow and aeration of the bioreactor

The bioreactor start-up and first years of operation has been described previously (Brands- van den Esschert, 2003 and Woelders, 2005) and therefor will be summarized. The pilot was constructed with a rectangular footprint of 55x80 meter, with an average depth of approximately 6 meters (Figure 2). The landfill gas has been extracted. The top cover is permeable to permit rainfall entrance and is suitable for methane oxidation. The organic waste is a mix of municipal solid waste and comparable industrial waste.



Copyright: © IWWG International Waste Working Group
Source: General Session B (Oktober 2007)
Pages: 11
Price: € 11,00
Autor: Hans Woelders
Hans Hermkes
Hans Oonk
Luchien Luning

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