The thermal integration into industrial process is majorly focused on guaranteeing the heat duty and temperature level demanded by the processes. Other important objectives must be considered when integrating solar thermal energy since its integration into industrial processes seeks to maximize its use. The present work proposes a comprehensive integration of solar thermal energy based on the Pinch Analysis that considers economical evaluation and environmental impact. The approach establishes multiple objectives for the optimal solar system final design. Profitable costs for two case studies, a dairy and a 2G bioethanol process, were obtained. For both scenarios the integrated solar thermal system of dairy processes was viable with zero emissions of CO2. In 2G bioethanol process, only in one scenario the solar fraction was equal to one. It is possible to reach a surplus energy of 44%, with the same absorber area of solar energy, or would be possible to reduce the area by 49% to supply the heat duties.