Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Potential energetic integration of municipal landfill effluents
Submission Author:
Eduardo Alves Amado , RS , Brazil
Co-Authors:
Paulo Smith Schneider
Presenter: Paulo Smith Schneider
doi://10.26678/ABCM.ENCIT2016.CIT2016-0718
Abstract
The work reported in this paper estimates mass and energy balances for municipal landfill gaseous and liquid effluents in order to verify the possibility of an energetic integration of the landfill effluents. The objective is to quantify if the amount of released heat by landfill gas (LFG) combustion is sufficient to evaporate the landfill leachate (LFL). A 1st order Intergovernmental Panel on Climate Change (IPCC) model is used to simulate biogas production and its uncertainties, and a modified water balance method is used to quantify leachate production and its uncertainties. Data from Guajuviras landfill, in Canoas – RS – Brazil is used to propose two case scenario for the energy integration: one where combustion and evaporation processes are ideal and another which they are closer to reality, both analyzed for a twenty years period. Energy integration is assessed in these scenarios via two metrics: Energy Surplus (ES) and Energy Ratio (ER). Results show that there would always be enough energy released from biogas to evaporate landfill leachate, and that tendency still can be supported if the uncertainties are taken into consideration. Mass and energy balances indicate that no more than 30% of the biogas released energy by combustion is enough to evaporate the leachate. Engineering systems are not proposed in the present study, but results indicate the possibility of an energy integrated system based on cogeneration.
Keywords
landfill energetic integration, landfill leachate, landfill gas
