Julian Barham treats the waste produced by his 4,000 sows using an in-ground digester that produces bio-gas that fuels a generator, which produces electricity for the farm. The system has been in place since 1996 and is one of five waste management technologies identified by scientists at North Carolina State University (NCSU) as promising alternatives to lagoons and spray fields.

This article from NHF looks at a digester that converts waste into power and reduces odor plus the wetlands used to treat hog manure from 3,520 finishing hogs in four barns.

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