Henrique Vieira de Mendonça’s latest research, published in *Acta Scientiarum: Tecnologia* (Acta Scientia: Technology), offers a compelling case for turning a waste problem into an energy opportunity in Brazil’s booming swine farming industry. The study, which tested full-scale anaerobic co-digestion of swine wastewater (SWW) with pig bedding material (BM), found that adding just 12 tonnes of bedding nearly tripled biogas production—translating directly into measurable energy output.
“What we’re seeing is that the bedding material isn’t just waste—it’s a co-substrate that boosts methane generation and stabilizes the digestion process,” Mendonça explains. His team monitored biogas production across four operational phases, increasing BM from zero to 12 tonnes while applying organic loads ranging from 310 to 805 kg COD per day. The results were clear: when 12 tonnes of bedding were added, biogas production jumped to levels capable of generating 635 kWh per day in summer and 270 kWh in winter—enough to power dozens of rural households or support on-farm operations.
The implications for energy producers and agricultural businesses are significant. By co-digesting two waste streams in a single reactor, farms can not only reduce disposal costs and environmental impact but also create a decentralized source of renewable electricity. Volatile solids removal of 60–70% and COD reduction of up to 84% further underscore the dual benefits of waste treatment and energy recovery.
As Brazil expands its pig farming sector—already a global leader—this model offers a scalable solution for integrating sustainability with profitability. For energy utilities eyeing distributed generation, and for swine producers seeking to cut energy bills and carbon footprints, Mendonça’s findings point to a future where manure and bedding aren’t liabilities, but assets in the energy transition.