Aproveitamento energético de resíduos agropecuários no modelo de análise integrada brasileiro

Abstract

Agricultural waste is a resource with potential for energy use, being able to meet the demands of bioenergy without causing the environmental impacts caused by the expansion of the agricultural frontier of energy crops. This work aimed, then, to improve the representation of agricultural waste and its energy chain in the BLUES model, in addition to incorporating new technologies for energy use, of centralized and distributed generation, aiming to expand the opportunities of using these resources. The modified BLUES model was used to project long-term supply curves for agricultural waste and its energy uses. The results obtained show that there is a potential of 5.0 EJ of primary energy available from waste at costs up to 30 $/GJ in 2050 and that 92% of this potential is below 7 $/GJ. About biogas, there is a potential of 1.53 EJ / year in 2050, much lower than the 1.15 PJ/year of current Brazilian biogas production. The potential of competitive biomethane with natural gas is equivalent to 0.08 EJ/year in 2050 and the potential is even greater when compared to LPG or considering carbon pricing strategies, requiring carbon rates equal to $ 200/tCO2eq to maximize this potential. Thus, there is a potential for the energy uses of waste competitive with other technologies and strategies that face the barriers associated with such technologies can expand this potential.