Biogas CHP (combined heat and power or cogeneration) is the utilization of biogas, typically in a biogas engine, for the production of electricity and useful heat, at high efficiency. Bio-Gas engines are specifically designed to operate on different types of Bio-Gas. These gas engines are linked to an alternator in order to produce electricity at high efficiency. High efficiency electricity production enables the end user to maximize the electrical output from the biogas and hence optimize the economic performance of the anaerobic digestion plant.