Anaerobic co-digestion of commercial food waste and dairy manure: characterizing biochemical parameters and synergistic effects

• Jacqueline H. Ebner ^[1] ; Rodrigo A. Labatut ^[2] ; Jeffrey S. Lodge ^[1] ; Anahita A. Williamson ^[1] ; Thomas A. Trabold ^[1]
  1. [1] Rochester Institute of Technology

     Rochester Institute of Technology

     City of Rochester, Estados Unidos

     
  2. [2] Pontificia Universidad Católica de Chile

     Pontificia Universidad Católica de Chile

     Santiago, Chile

     
• Localización: Waste management, ISSN-e 0956-053X, Vol. 52, 2016, págs. 286-294
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Anaerobic digestion of commercial food waste is a promising alternative to landfilling commercial food waste. This study characterized 11 types of commercial food wastes and 12 co-digestion blends. Bio-methane potential, biodegradable fraction, and apparent first-order hydrolysis rate coefficients were reported based upon biochemical methane potential (BMP) assays. Food waste bio-methane potentials ranged from 165 to 496 mL CH4/g VS. Substrates high in lipids or readily degradable carbohydrates showed the highest methane production. Average bio-methane potential observed for co-digested substrates was −5% to +20% that of the bio-methane potential of the individual substrates weighted by VS content. Apparent hydrolysis rate coefficients ranged from 0.19 d−1 to 0.65 d−1. Co-digested substrates showed an accelerated apparent hydrolysis rate relative to the weighted average of individual substrate rates. These results provide a database of key bio-digestion parameters to advance modeling and utilization of commercial food waste in anaerobic digestion.