Anaerobic Digestion of Dairy Effluent in New Zealand, Time to Revisit the Idea?

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 replacement; therefore, we are studying how these changes affect the overall production water heating. A combination literature review, surveys, chemical analyses, biomethane potential analysis, modeling were used this study. On a case study farm solid separator, it was found that 558 MJ/day 176–861 could be produced liquid portions effluent, respectively. There is enough biogas to satisfy farm’s heating requirements tankless heater.