Biomethane Production From Residual Algae Biomass (Ecklonia maxima): Effects of Inoculum Acclimatization on Yield

Clarisa Naa Shormeh Darko, Benjamin Agyei-Tuffour, Dorcas Funmilayo Faloye, Neill Jurgens Goosen, Emmanuel Nyankson, David Dodoo-Arhin

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Abstract: This paper presents the effects of inoculum acclimatization on biomethane production from extraction residues of the seaweed (Ecklonia maxima) via anaerobic digestion. Anaerobic digestion of Ecklonia maxima has been studied with and without acclimatized inoculum under mesophilic conditions (~ 37 °C) for a digestion period of twenty (20) days. The acclimatized inoculum-seaweed sample recorded the highest methane yield of ~ 862 ml CH4/gVS (~ 55% of the total biogas produced) compared to the ~ 580 ml CH4/gVS recorded for the non-acclimatized inoculum- seaweed sample, both within the first ten (10) days. Kinetic studies on acclimatized and non-acclimatized samples were carried out using the modified Gompertz model. The model showed coefficients of determination (R2) of 0.99 and 0.98 with an estimated yield rate (µ) of ~ 296 ml/gVS/day (0.4 days phase lag, λ) and ~ 60 ml/gVS/day (3.4 λ) for the acclimatized and non-acclimatized samples respectively. The Fourier transform infrared spectroscopy (FTIR) analyses revealed the presence of carboxylic, hydroxyl, ketone and ether groups which further corroborated the suitability of E. maxima for biogas production. The implications of the results are discussed to elucidate the potential of seaweed as a renewable energy source for macroalgae biorefinery. Graphical abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)497-509
Number of pages13
JournalWaste and Biomass Valorization
Volume13
Issue number1
DOIs
Publication statusPublished - Jan 2022

Keywords

  • Anaerobic digestion
  • Biogas yield
  • Climate change
  • Methanogenesis
  • Seaweed

Fingerprint

Dive into the research topics of 'Biomethane Production From Residual Algae Biomass (Ecklonia maxima): Effects of Inoculum Acclimatization on Yield'. Together they form a unique fingerprint.

Cite this