Diseño de un módulo de desalinización de agua salobre mediante electrodiálisis capacitiva para obtención de agua de uso industrial: Caso de estudio empacadora de camarón

Abstract

The present project addresses the design of a brackish water treatment system for industrial use in a shrimp packing plant, located south of Guayaquil, with the purpose of ensuring a potable quality water supply through the application of capacitive electrodialysis. The main objective of this document is to reduce the salinity levels of water drawn from the Guayas river. The study is justified by the need to ensure operational continuity and reduce the costs associated with the use of potable water from public networks, presenting energy-efficient and sustainable technology. The study was developed based on water characterization, the survey of the existing water treatment plant, and experimentation with a laboratory scale electrodialysis module. For this purpose, were employed multiparameter equipment, peristaltic pumps, and potentiostat, and recording parameters such as voltage, current, flow rate and total dissolved solids (TDS). The proposed design is in accordance with INEN 1108 and TULSMA standards. The results showed that the two stage electrodialysis system enabled the reduction of TDS from 5.95 g/L to projected values bellows 1 g/L, with a specific energy consumption ranging from 0.44 to 0.48 kWh/m³. The laboratory design was scaled up to treat 216 m³/hr with an estimated cost of $3.45 million for every five years of operation, which is competitive compared to conventional technologies. It is concluded that capacitive electrodialysis represents a technically and economically viable alternative for the treatment of brackish water in the shrimp industry, promoting energy efficiency and sustainability of water resources. Keywords: Capacitive Electrodialysis, desalination, energy efficiency, shrimp industry.