Abstract
Sustainability indexes or indicators may be considered objective functions for industrial processes. They are based on different considerations; AIChE sustainability index [1] is based on seven components: Environmental Performance, Safety Performance, Product Stewardship, Social Responsibility, Value-Chain Management, Strategic Commitment and Sustainability Innovation; the Sustainable Development Progress Metrics developed by IChemE is based on three components: Environmental indicators, Economic indicators and Social indicators [2], but in all cases environmental variables play an important role in the sustainability evaluation. The Environmental Sustainability is based on two different variables: (1) Natural Resources Sustainability (NRS), and (2) Environmental Burdens Sustainability (EBS). The main components of EBS have been classified as atmospheric pollutants, water pollutants, soil pollutants and a fourth group including specific environmental burdens such as noise, etc. In this work normalization procedures for the environmental sustainability will be developed in order to get suitable objective functions for process optimization.
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