Avaliação em emergia como ferramenta para análise da sustentabilidade em um sistema produtivo

Abstract

The present study aimed to analyze, from the point of view of the emergy methodology, the level of sustainability of a productive system formed by two apiaries in the municipality of Regeneração, Piauí. The concept and how to apply emergy was developed with the aim of synthesizing a consistent methodology capable of determining the use of resources in a given system, called environmental accounting. The emergy evaluation process follows some linear steps, such as: (i) identification of the study site; (ii) elaboration of the energy diagram, shown in Figure 1; (iii) assembly of the emergy evaluation table; (iv) calculation of emergy indices and (v) interpretation of results. From the essential calculations made through Table 2, it was possible to calculate the emergy indicators. These values were: 4.05 for the emergy yield indicator (EYR); 0.33 for the environmental load indicator (ELR); 12.3 for the environmental sustainability indicator; and, finally, 75.2% system renewability. In this way, the study was able to achieve the objectives since it demonstrated all the indexes related to sustainability