Román Rivera, Luis A.

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    Desarrollo de un co-digestor anaeróbico para una porqueriza en Cayey, Puerto Rico
    (2023-05-12) Román Rivera, Luis A.; Pérez Alegría, Luis R.; College of Agricultural Sciences; Martínez Rodríguez, Gustavo; Abelleira Martínez, Oscar J.; Department of Crops and Agro-Environmental Sciences; Rúa De La Asunción, Armando
    In PR, many of the small and medium-scale pig farmers face great challenges daily with the handling and management of the organic waste generated in their operations, which in turn generate great economic challenges. The anaerobic digestion process has been called one of the most suitable organic waste treatments because in addition to treats this waste efficiently, it has the advantage of reducing the generation of greenhouse gases emissions (GHGE), generating methane and high-quality composts for agricultural potential. However, often the energy supplied by the biodigester is not enough to meet the energy demand of the farmer. With the purpose of finding a viable way for pig farmers to manage the waste generated in their farming production in a sustainable and economic way, but at the same time taking full advantage of the available resources to generate the greatest amount of energy per unit of volume, decided to test the anaerobic co-digestion method to determine its feasibility for pig slurry wastewater, in combination with different residual biomasses from the food processing industry and distributors. A feedstock characterization analysis for substrates, along with a biological methane potential (BMP) analysis, was used to determine which of these biomasses, and which particle size of these biomasses, generates the greatest increase in methane yield. Of all the residues used as co-substrates in the anaerobic co-digestion, the plantain peel residues were the most efficient in increasing methane yield. It was determined that adding approximately 44g of plantain peels waste, per liter of slurry wastewater, in a particle size of approximately 0.5cm, can generate increases in methane yield production rates up to 111.94 L. Kg (VS) in comparison with the 7.08 L. Kg (VS) obtained with the anaerobic digestion with only pig slurry wastewater.