Module 4 presents a number of forms of anaerobic digester technologies and a number of tools that can be used to choose the right technology for each situation. As co-digestion becomes more important in states with new bans on the landfilling of organic wastes, technology of new AD facilities becomes a larger issue. Technologies that allow efficient co-digestion have higher capital costs, but typically have higher revenues. Case studies are presented where available, and we're creating more.
4.2 Passive AD systems
4.3 Low-rate AD systems
4.5 Dry AD systems
Module 4 Assessement
Examples of anaerobic digester technology in Vermont and Massachusetts: