(PT) Avaliação do reaproveitamento de dormentes de madeira da Estrada de Ferro Carajás para a cogeração de energia elétrica

Author(s): DAMASCENO, Fabio Gorayeb
Summary: Wood sleepers scraps treated with chemical or oily compouds are one of the critical residues to the environmental management of railways. Unfortunately, they have scarce proper disposal due their volume and potential toxicity. Along the duplication of EFC railway, approximately 770,000 wood sleepers will be generated until 2022. This study evaluated the co-firing process of wood sleepers and forestry biomass in a thermoelectric power unit of the region cut by EFC railway to produce energy. This study analyzed the environmental and economic aspects of energy cogeneration according to the burning feasibility study (BFS). Into the stack flow, emission samples of forestry biomass burning (blank test) were found to be collected. Then, were introduced wood sleeper chips mixed with forestry biomass by 1:5 ratio. According to the standard analytical methodologies recommended by State of Sao Paulo Environmental and Sanitation Technology Company (or CETESB - Companhia de Tecnologia de Saneamento Ambiental, in Portuguese), United States Environmental Protection Agency (US EPA) and Brazilian Association of Technical Standards (ABNT), the result of the BFS was compared to the limits of air emission parameters stablished by Brazilian environmental law to waste incineration. We found evidence of economic viability with savings of 19.2 per cent in the total biomass cost when wood sleepers were mixed to it to generate thermoelectric energy. The savings represent 21.4 per cent of the annual budget of the social project “Casa Saudável” (Healthy Home) developed in Pindaré region, Maranhao State, Brazil, by Vale Foundation. The result confirmed the sustainability of reusage of wood sleepers to energy production. However, an efficient gas emission system must be taken into account to control particulate matter, dioxins and furans.
Year: 2015
Pages: 110 f.
Year of publication: 2015
Supervision: Valente José Matlaba, Dr.
Link to PDF: Click here
Course: Master's Degree in Sustainable Use of Natural Resources in Tropical Regions