A discretization approach for the optimal design of mass integration networks of eco-industrial parks
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abstract
This paper presents a mathematical programming formulation for the water integration in eco-industrial parks considering streams with several pollutants. The mathematical formulation is based on a superstructure that allows the wastewater reuse in the same plant and the water exchanges with different plants. There is also a shared set of treatment units that must be selected to determine the network configuration that satisfy the process equipments constraints, as well as the environmental constraints for the pollutants discharged to the environment. The model formulation consists in determining the network with the minimum total annual costs considering the costs for the fresh waters, piping and the required treatment units. A new discretization approach is also proposed to handle the large set of bilinear terms that appear in the model to yield a near global optimal solution. The results obtained in several examples show considerable savings with respect to the solutions obtained with the typical approach of individual plant integration.
