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MBT-Landfill as Carbon Sink - Expected Carbon Content after Aeration

Target of MBT (mechanical biological treatment of wastes) is to mineralise and to stabilise waste organic matter. This leads to a reduction of emissions after landfi lling the pretreated wastes. It is well known, that MBT-landfills can be seen as a carbon sink, but there is a deficit in knowledge about the time frame respectively which share of organic carbon will remain in the landfill over long period.

During last decades at ABF-BOKU approximately 800 incubation tests (according to Ö-NORMS2027 part 2 2012) were analysed (380 MBT samples and 330 samples from old landfill sites). Many of these tests were carried out over much longer test periods than minimum duration (21days + lag-phase) described in the Austrian standard. Duration was several 100 days up to 8 years! 141 of these long-term tests were evaluated to get an idea about gas formation potential respectively the 'end-carbon-contentâ€� in MBT-landfills. In a first step a prediction model (log-normal distribution curve) for gas formation potential was developed (Tintner et al. 2011; Binner et al. 2013). Actual the gas formation potential of 91 MBT-samples and 27 samples from old landfills was estimated by this model. The MBT-samples were taken in 12 Austrian MBT plants. Thus feedstock materials and mechanical treatment as well as duration of treatment of the analysed samples differ very huge.

Copyright:	© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben
Quelle:	Depotech 2014 (November 2014)
Seiten:	1
Preis:	€ 0,00
Autor:	Dipl.-Ing Erwin Binner Alexandra Pukhnyuk Dipl.-Ing. Dr. Marion Huber-Humer
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