Estudo de viabilidade da exploração de biogás em um aterro sanitário de pequeno porte

Abstract

The National Solid Waste Policy (PNRS) 2010 stimulates recovery of recyclables, the organization and the formalization of waste pickers work, and encourage the energy use of biogas generated in landfills. Based on these principles, the present work used first order equation to simulate biogas generation and economic studies for the implementation of a plastic recycling system using the energy produced by the biogas in a landfill small. Current literature little explores the economics of this niche and, therefore, grounds for a successful implementation of PNRS are scarce. It was modelled up a biogas base flow of 500 m³.h-1, producing a constant amount of electricity of 700 kW h-1 from 2015 until 2022. From there, we analysed the economic feasibility of two different environments, operating through a waste pickers cooperative and a through recycling company. For each of these two environments it was developed three scenarios of acquisition of plastic material (purchased 100% purchased, 50% purchased and 50% donated, and 100% donated). The economic sustainability of a system of this size was reached only if operated through cooperative and 100% donated raw material. The study also showed that, without considering the environmental and social gains, the viability and sustainability of this production chain are made vulnerable.