Evaluating biochemical methane production from brewer's spent yeast.
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.
Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Ave. Eugenio Garza Sada 2501, 64849, Monterrey, NL, Mexico.
Ornella
O
Sosa-Hernández
Swette Center for Environmental Biotechnology, Biodesign Institute, Arizona State University, 1001 S McAllister Ave, Tempe, AZ, 85287, USA.|Department of Civil Engineering, Kansas State University, Manhattan, 2123 Fiedler Hall, Manhattan, KS, 66502, USA.
Prathap
P
Parameswaran
Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Ave. Eugenio Garza Sada 2501, 64849, Monterrey, NL, Mexico.
Gibrán Sidney
GS
Alemán-Nava
School for Engineering of Matter, Transport and Energy, Arizona State University, 1001 S McAllister Ave, Tempe, AZ, 85287, USA.
César I
CI
Torres
Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Ave. Eugenio Garza Sada 2501, 64849, Monterrey, NL, Mexico. r.parra@itesm.mx.
Roberto
R
Parra-Saldívar
D000693:Anaerobiosis; D056804:Biofuels; D006868:Hydrolysis; D007700:Kinetics; D008697:Methane / Q000378:metabolism*; D015003:Yeasts / Q000378:metabolism*
D056804:Biofuels; D008697:Methane
Anaerobic digestion; Biochemical methane potential (BMP); Brewer’s spent yeast