Natural gas cogeneration presently appears to be a promising alternative to satisfy energy requirement of the process industries. In this paper a case study is detailed in a food processing plant where a gas turbine cogeneration with heat recovery system was installed. Fuel oil and LPG previously used were substituted by natural gas firing. The thermal-matching option was adopted and the excess electricity was sold to the state electric utility. With the implementation of the system, plant overall efficiency was improved and pollutant emissions were reduced.