Integrating remediation and resource recovery: On the economic conditions of landfill mining
2014 (English)Manuscript (preprint) (Other academic)
This article analyzes the economic potential of integrating material separation and resource recovery into a landfill remediation project, and discusses the result and which factors affect the result the most. This is done using a hypothetical landfill and two main scenarios. One scenario consists of a remediation project of an old unlined landfill of 100,000 m3 where the material is excavated, the lining systems are constructed, and the material is re-deposited. The second scenario adds resource recovery to the remediation project, separating fines, combustibles, metals, and hazardous material using state-of-the-art separation technology placed at the landfill. To account for uncertainties, all input parameters have a set probability distribution and Monte Carlo simulation is used to produce results. Since the situation regarding landfill tax and the costs induced from handling the separated combustibles are uncertain, two cases were created: case A, where landfill tax is waived on the redeposited material and where the landfill holder owns its own combined heat and power plant and is able to profit from the waste incineration; and case B, where landfill tax needs to be paid for redeposited material and the landfill holder does not own a CHP, which leads to disposal costs in the form of gate fees. Results show that the remediation project in this study costs about €23/ton. For case A, integrating resource recovery leads to a decrease in cost for the remediation project to €14/ton while for case B the result is worsened by including resource recovery, €36/ton. This shows the importance of landfill tax and the access to a CHP. Other important factors for the result are the material composition in the landfill, the efficiency of the separation technology used, and the price of the saleable material.
Place, publisher, year, edition, pages
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-106711OAI: oai:DiVA.org:liu-106711DiVA: diva2:718013