Preliminary analysis from slaughterhouse waste: energy potential of biohydrogen and biomethane in Tenerife
J. A. Perez-Remedios, K. E. Rodríguez, L.A. González, D. J. Escalante   Chemical Engineering Department. University of La Laguna. Av. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island, 38200 (Spain) 2025-07-25

Abstract

Slaughterhouse waste generated in Tenerife is currently disposed of in landfills, highlighting the need for a sustainable alternative. This study explores anaerobic digestion as a viable solution, assessing hydrogen and methane production through one- and two-step processes. Four experimental conditions were tested, including co-digestion with glycerol and variations in acid hydrolysis time. Key performance indicators such as alkalinity, volatile fatty acids (VFA), and solid content were analyzed. The two-step process achieved the highest cumulative biogas yield, significantly enhancing substrate digestibility due to acid hydrolysis. Energy potential ranged from 1.87 to 27.82 J/g VS, with the best performance observed in the two-step system. The estimated annual energy production from slaughterhouse waste could reach 12,883 kWh annually. These findings underscore the potential of anaerobic digestion as a method for sustainable waste management, aligning with circular economy principles and contributing to energy self-sufficiency in the Canary Islands through a reliable renewable energy source.

Key words: Biohydrogen, anaerobic digestion, slaughterhouse waste, biomethane.

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