Want to cut the electric bill by some 85 percent. All that is needed are 9,000 pigs.
That is how Granja Porcina Toledo in Guápiles did it, according to a recent presentation.
Costa Ricans love pork, but raising pork generates a lot of waste. Granja Porcina Toledo installed a biodigester to handle the waste and produces methane that is fed to an electrical generator.
The firm cut its monthly electrical bill form 1.2 million colons, more than $2,200, to 200,000, less than $400. The generator runs eight hours a day.
The project was outlined at the Universidad Técnica Nacional in Atenas during a seminar sponsored by the Programa Recursos Digitales para el Desarrollo Económico Sosteniblede Centroamérica with the support of the Fundación Hivos de Holanda.