Anaerobic digestion of dairy manure can be configured in various centralized systems involving multiple farms to achieve economy of scale for renewable natural gas (RNG), also known as biomethane, energy production. An overview of 3 configurations including aggregated manure to a central digester and aggregated biogas to centralized RNG upgrading are illustrated in this fact sheet. The key considerations and questions for discussion among participating dairy farms and the project developer are listed for these configurations.