Anaerobic Digester Survey of California Dairy Producers

Evaluation of Co-Digestion at a Commercial Dairy Anaerobic Digester

Co-digestion of dairy manure with off-farmwaste has become a common practice on US farms, however, little data at a commercial-scale is present within the literature. In response, a mesophilic, mixed plug-flow reactor co-digesting 16.36% v/v food processing substrates with dairy manure, was monitored for its performance and substrate effects. Co-digestion, as compared to substrate or manure-onl...

An Analysis of the Tradeoffs between Policy Instruments to Induce Dairy Producers in California to Participate in a Centralized Digester

Tradeoff between different utility rates and policy intervention to induce dairy producer to join a regional digester are studied. Results demonstrate that a regional digester for the dairy industry in California is feasible given the digester receives $0.05 per kWh and government intervention or $0.0925 per kWh with no intervention. Copyright 2007 by Sean Hurley, and James Ahern, and Douglas W...

Anaerobic Digester Feasibility Study

Methane Production from a Pilot-Scale Fixed-Film Anaerobic Digester and Plug-Flow Digester Loaded with High-Solids Dairy Manure

Three pilot-scale anaerobic digesters (two of a unique fixed-film design, of which one was fed micronutrients, one not, and an identically sized plug-flow digester, which served as the control) were monitored for methane production as a comparative indication of performance. All of these pilot-scale digesters were loaded daily with high-solids dairy manure, passed through a 1.5" x 3" mesh scree...

Evaluating the Anaerobic Codigestion Potential of Stillage and Dairy Manure in a Tubular Digester

..................................................................................................................................... vi Chapter 1: Introduction ............................................................................................................... 1 Chapter 2: Bachground .......................................................................................................