Kinetic-based extrapolating of methane production potential for seaweed/food waste matrixes


Yoruklu H. C. , DEMİR A., ÖZKAYA B.

International Journal of Global Warming, vol.21, no.1, pp.86-104, 2020 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 1
  • Publication Date: 2020
  • Doi Number: 10.1504/ijgw.2020.107874
  • Journal Name: International Journal of Global Warming
  • Journal Indexes: Science Citation Index Expanded, Scopus, Agricultural & Environmental Science Database, CAB Abstracts, INSPEC, Veterinary Science Database, Civil Engineering Abstracts
  • Page Numbers: pp.86-104
  • Keywords: seaweed, the Marmara Sea, food waste, kinetics, anaerobic digestion, LIFE-CYCLE ASSESSMENT, ANAEROBIC-DIGESTION, FOOD WASTE, BIOGAS PRODUCTION, CO-DIGESTION, BIOMETHANE PRODUCTION, THERMAL PRETREATMENT, MARINE MACROALGAE, INOCULUM RATIO, SUBSTRATE

Abstract

Copyright © 2020 Inderscience Enterprises Ltd.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 VSsubstrate/g VSinoculum, but it could be reached up to 2,172 m3biogas / m3reactor / d in continuous-fed-system when seaweed/food waste mixture ratio increases to 2/1 at 6 g VSsubstrate/g VSinoculum. 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.