Application of microbial electrolysis cells to treat spent yeast from an alcoholic fermentation

Ornella Sosa-Hernández, Sudeep C. Popat, Prathap Parameswaran, Gibrán Sidney Alemán-Nava, César I. Torres, Germán Buitrón, Roberto Parra-Saldívar
2016 Bioresource Technology  
Spent yeast (SY), a major challenge for the brewing industry, was treated using a microbial electrolysis cell to recover energy. Concentrations of SY from bench alcoholic fermentation and ethanol were tested, ranging from 750 to 1500mgCOD/L and 0 to 2400mgCOD/L respectively. COD removal efficiency (RE), coulombic efficiency (CE), coulombic recovery (CR), hydrogen production and current density were evaluated. The best treatment condition was 750mgCOD/LSY+1200mgCOD/L ethanol giving higher COD
more » ... iving higher COD RE, CE, CR (90±1%, 90±2% and 81±1% respectively), as compared with 1500mgCOD/LSY (76±2%, 63±7% and 48±4% respectively); ethanol addition was significantly favorable (p value=0.011), possibly due
doi:10.1016/j.biortech.2015.10.053 pmid:26512857 fatcat:cvoc33lvi5gbbcrsxrnaopdyly