Title:
Strategies for Energy Recovery and Gains Associated with the Implementation of an Extra-Dry Methanization System for Treating Organic Waste from the City of Rio De Janeiro - Brazil
Author(s):
Ferreira, B.O., Lobato, L.C.S., Colturato, L.F.D., Pereira, L.E.G., Pujatti, F.J.P., Chernicharo, C.A.L.
Document(s):
Paper
Abstract:
This work aimed at studying strategies for energy recovery from a demo-scale extra-dry methanization system (TMethar) implemented in the city of Rio de Janeiro, Brazil, besides evaluating the economic and environmental gains associated with the different uses of the biogas. The demo-scale plant is capable of treating 23.5 t.d-1 of the organic fraction of municipal solid waste (OFMSW) and is composed by the following main units: i) six methanization tunnels; ii) a hybrid tunnel that can work as methanization and as thermal-drying tunnel; iii) a completely mixed anaerobic reactor for leachate stabilization and inoculum production; and iv) auxiliary units for biogas conditioning, treatment and utilization. Main results: i) the expected biogas production (2,613 Nm³biogas.d-1) will be sufficient to guarantee the energy self-sufficiency of the plant (11.2MWhel.month-1) and of the main Waste Transhipment Unit of Rio de Janeiro city (37 MWhel.month-1), besides generating a surplus of 80,7 MWhel.month-1 to be injected into the power grid; ii) the replacement of diesel by biomethane to fuel the transhipment trucks would allow savings close to €28,605.month-1, which is equivalent to around €40.5.tOFMSW-1 treated in the plant and higher than the income generated by power grid injection (€8.2.tOFMSW-1); iii) in the full-scale operation TMethar will avoid about 1,225 kgCO2eq.tOFMSW -1. The avoided GHG emissions by replacement of hydropower energy by renewable energy from biogas is about 292.5 kgCO2eq.tOFMSW -1 while the GHG mitigation from replacement of diesel by biomethane is 156.8 kgCO2eq.tOFMSW -1.
Keywords:
biogas, greenhouse gases (GHG), renewable energies, organic fraction of municipal solid waste (OFMSW), solid state anaerobic digestion (SSAD)
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Anaerobic digestion for biogas production and biogas upgrading
Event:
26th European Biomass Conference and Exhibition
Session:
2DO.7.5
Pages:
599 - 605
ISBN:
978-88-89407-18-9
Paper DOI:
10.5071/26thEUBCE2018-2DO.7.5
Price:
FREE
