1 year ago
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Energies, Vol. 16, Pages 2859: Anaerobic Digestion of Dairy Effluent in New Zealand, Time to Revisit the Idea?
Energies doi: 10.3390/en16062859
Authors: Marianne Hull-Cantillo Mark Lay Peter Kovalsky
The anaerobic digestion of New Zealand low-input dairy farms has previously been evaluated for energy production, but farming systems have recently become more intensive with increased feed supplementation and feed replacement; therefore, we are studying how these changes affect the overall energy production for water heating. A combination of literature review, surveys, chemical analyses, biomethane potential analysis, and modeling were used for this study. On a case study farm with a solid separator, it was found that 558 MJ/day and 176–861 MJ/day could be produced with the solid and liquid portions of effluent, respectively. There is enough biogas to satisfy the dairy farm’s water heating requirements with a tankless water heater.
