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

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-content” 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.