Biorefining and industrial symbiosis: A proposal for regional development in Brazil

The consolidation of the biorefinery concept has the potential to contribute to the sustainable development of agro-industrial regions, particularly in developing countries. The industrial symbiosis (IS) approach can leverage this potential through industrial cooperation, fostering new businesses, innovation and job creation coupled with reduced environmental impacts. We argue that coupling the biorefinery concept and the IS approach would invigorate traditionally agricultural regions, relying on endogenous vocation to promote sustainability. The purpose of this study is to examine the potential for development of an agro-industrial symbiosis network (ISN) from the construction of a biorefinery in the Norte Fluminense region (Brazil) - a region that has become highly dependent on oil & gas revenues but still has a tradition in agriculture and agro-industry. In this paper, we present the scenario analysis performed to design the agro ISN and an initial quantification of potential benefits. Four scenarios were developed (reference, short, mid and long terms) with the support of a synergy matrix and material flow analysis. Eighteen waste streams were identified and sixteen were addressed through the scenarios. In the long-term scenario, 14 productive activities could compose the agro-industrial symbiosis network, 8 of them as newcomers. "Quick-wins" were identified as residues in the reference scenario (CO2, fusel oil and used yeast) that could be absorbed by industries currently operating in the region. The emission of respectively 350 thousand and 55 thousand tonnes per year of solid waste and CO2 would be avoided in the long term. Also, the production of succinic acid would provide additional revenue of at least US$19 per tonne of bagasse, adding higher value to the feedstock in comparison to electricity production. This study can prompt current recycling regulation towards multi-sectorial arrangements, which can better contribute to regional resilience than the single-sector reverse logistics' arrangements that became recently mandatory with the National Policy on Solid Waste. (C) 2017 Elsevier Ltd. All rights reserved.