Evaluating biochemical methane production from brewer’s spent yeast

Ornella Sosa-Hernández, Prathap Parameswaran, Gibrán Sidney Alemán-Nava, Cesar Torres, Roberto Parra-Saldívar

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Anaerobic digestion treatment of brewer’s spent yeast (SY) is a viable option for bioenergy capture. The biochemical methane potential (BMP) assay was performed with three different samples (SY1, SY2, and SY3) and SY1 dilutions (75, 50, and 25 % on a v/v basis). Gompertz-equation parameters denoted slow degradability of SY1 with methane production rates of 14.59–4.63 mL/day and lag phases of 10.72–19.7 days. Performance and kinetic parameters were obtained with the Gompertz equation and the first-order hydrolysis model with SY2 and SY3 diluted 25 % and SY1 50 %. A SY2 25 % gave a 17 % of TCOD conversion to methane as well as shorter lag phase (<1 day). Average estimated hydrolysis constant for SY was 0.0141 (±0.003) day−1, and SY2 25 % was more appropriate for faster methane production. Methane capture and biogas composition were dependent upon the SY source, and co-digestion (or dilution) can be advantageous.

Original languageEnglish (US)
Pages (from-to)1195-1204
Number of pages10
JournalJournal of Industrial Microbiology and Biotechnology
Volume43
Issue number9
DOIs
StatePublished - Sep 1 2016

Keywords

  • Anaerobic digestion
  • Biochemical methane potential (BMP)
  • Brewer’s spent yeast

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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