This document discusses optimizing plant electrical efficiency through capturing residual or waste heat. It describes two scenarios: a biogas setup and a biomass setup. A modularized plant design is proposed with four modules: a standard process module, evaporator, optional heat rejection module, and electrical power module. Business cases are presented for installing an ORC system at a UK biogas site and biomass site, showing paybacks of 3.18 and 2.7 years respectively. Contact details are provided for further information.