Development of Co-Digestion Software Models to Assist in Plant Design and Co-Digestion Operation

Co-digestion is a widely used protocol for biologically stabilizing wastewaters and waste solids that otherwise might be sent to alternative disposal sites such as landfills. The number of applications is growing, within both farm (Frear et al., 2009) and municipal digester (Wallis et al., 2008; Zupancic et al., 2008) applications. In many cases, one of the motivations for practicing co-digestion is to better exploit under-utilized digesters and to bring in added income to the facility through received tipping fees. Problems can occur, though, with co-digestion, particularly in regard to: