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Livestock Manure and Agricultural By-Products for Biogas

The Pig Site, July 4 2011

The researchers, María Cambra-López, Verónica Moset and Pablo Ferrer from the Institute for Animal Science and Technology of the Universitat Politècnica de València (Spain) explain that pig farms generate large amounts of slurry, which does not produce much energy on its own, and therefore a biogas plant is not a profitable business for farmers.
- However, if we combine it with certain fruit and vegetables from the region that are not good enough to sell, we can increase the methane level and, this way, produce biogas cost-effectively, she said.
So far, researchers have tested in vitro the combination of pig slurry with peppers, tomatoes, peaches and kaki to study their potential to produce biogas and the optimal combination of both substrates.
The researchers believe that in another year, they will be able to offer results and could transfer the technology to real-scale centralised biogas plants. They say the benefits of this project are extensive and varied. On the one hand, it reduces the emission of methane during slurry storage, a highly polluting gas that has a higher greenhouse effect than carbon dioxide. On the other, it provides farmers with an alternative use for pig slurry as well as an additional income.


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