Process Design and Feasibility Study of Food-Grade Salt Production from Crude Solar Salt in Madura, Indonesia

The production of food-grade salt from crude solar salt has been rigorously evaluated through a comprehensive techno-economic analysis. This study aimed to investigate a salt factory to assess its technical and economic aspects, identify precise parameters for enhancing the quality of food-grade salt, and develop a cost-effective and novel method for processing high-quality food-grade salt. The factory’s primary processes include grinding, washing, draining, drying, and fortification, supported by equipment such as brine management systems, conveyors, sieves, and packaging machinery. The proposed salt plant, designed for a daily output of three tons over 15 years, requires 30 months for construction and a 4-month startup period. The total capital investment is USD 1,921,000, with USD 310,000 allocated for technology and equipment. Economic indicators, including a Net Present Value (NPV) of USD 7,862,000, an Internal Rate of Return (IRR) of 46.48%, a payback period of 1.56 years, and a Return on Investment (ROI) of 64.28%, demonstrate its feasibility. Furthermore, this research provides a detailed production process and layout of the plant, which is crucial for all stakeholders. Moreover, it emphasizes the critical need for designing an effective organizational structure and addressing identified safety issues to maximize efficiency and safety in food-grade salt factories. Therefore, establishing a salt plant in Indonesia supports food-grade salt production, stabilizes solar salt prices, and enhances the welfare of traditional salt farmers. Ultimately, the results of this study offer valuable insights for all stakeholders regarding the feasibility of establishing a food-grade salt production plant in Indonesia.