Kinetic-based extrapolating of methane production potential for seaweed/food waste matrixes
by Hulya Civelek Yoruklu; Ahmet Demir; Bestami Ozkaya
International Journal of Global Warming (IJGW), Vol. 21, No. 1, 2020

Abstract: Seaweed accumulation result in undesirable environmental problems along the coastline of Istanbul. In this study, methane production potential of seaweed/food waste matrix was evaluated to explore how much of waste seaweed could be fed with food waste to an anaerobic digester at what rates of substrate to inoculum (S/X). Results indicated that the reactors fed with only food waste were inhibited with the S/X ratio exceeding 4 g VS_substrate/g VS_inoculum, but it could be reached up to 2,172 m³_biogas/m³_reactor/d in continuous-fed-system when seaweed/food waste mixture ratio increases to 2/1 at 6 g VS_substrate/g VS_inoculum. This was indicated that seaweed was a useable agent with a good buffer capacity to improve performance of digesters arising from substrate inhibition. Methane production potential data was also modelled to describe the digestion kinetics by modified Gompertz, first-order, logistic function, and transference equation models. Transference function among applied models gave the best fit to describe the kinetics of methane production potential at practical applications.

Online publication date: Fri, 26-Jun-2020

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