TY - JOUR
T1 - Acclimation of microorganisms for an efficient production of volatile fatty acids and biogas from mezcal vinasses in a dark fermentation process
AU - Díaz-Barajas, S. A.
AU - Garzón-Zúñiga, M. A.
AU - Moreno-Andrade, I.
AU - Vigueras-Cortés, J. M.
AU - Barragán-Huerta, B. E.
N1 - Funding Information:
The financial support granted by ‘Fondo de SIP IPN (Mexico)’ through project 2020 2000 energy production from liquid waste from the agroindustry is gratefully acknowledged. S.A. Díaz-Barajas thanks CONACYT for the award of a scholarship.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - Mezcal is an alcoholic artisanal drink made from agave plants in Mexico. Its production causes the generation of wastewater called vinasses, which are highly polluting residues due to its concentration of organic matter as chemical oxygen demand (COD) (35,000–122,000 mg/L) and acidity (pH< 4). Due to their organic content, these residues can be used in dark fermentation to obtain biogas, which is rich in H2. The acclimation of inoculum by means of a dark fermentation process in the presence of toxic compounds from mezcal vinasses was investigated. The strategy of increasing the initial concentration of vinasse in each treatment cycle in a sequencing batch reactor (SBR) reactor was applied. A maximum biogas production of 984 ± 187 mL/L was obtained, from vinasses (18,367 ± 1200 mg COD/L), with an organic matter removal efficiency of 20 ± 1%. A maximum generation of volatile fatty acids of 980 ± 538 mg/L equivalent to a production of 74% ± 21% of the influent concentration and removal rate of organic matter of 1125 ± 234 mg COD/L-d equivalent to a removal efficiency of 20% ± 4% was obtained from vinasses with a concentration of 19,648 ± 1702 mg COD/L.
AB - Mezcal is an alcoholic artisanal drink made from agave plants in Mexico. Its production causes the generation of wastewater called vinasses, which are highly polluting residues due to its concentration of organic matter as chemical oxygen demand (COD) (35,000–122,000 mg/L) and acidity (pH< 4). Due to their organic content, these residues can be used in dark fermentation to obtain biogas, which is rich in H2. The acclimation of inoculum by means of a dark fermentation process in the presence of toxic compounds from mezcal vinasses was investigated. The strategy of increasing the initial concentration of vinasse in each treatment cycle in a sequencing batch reactor (SBR) reactor was applied. A maximum biogas production of 984 ± 187 mL/L was obtained, from vinasses (18,367 ± 1200 mg COD/L), with an organic matter removal efficiency of 20 ± 1%. A maximum generation of volatile fatty acids of 980 ± 538 mg/L equivalent to a production of 74% ± 21% of the influent concentration and removal rate of organic matter of 1125 ± 234 mg COD/L-d equivalent to a removal efficiency of 20% ± 4% was obtained from vinasses with a concentration of 19,648 ± 1702 mg COD/L.
KW - Acclimation
KW - Dark fermentation
KW - Inoculum activation
KW - Mezcal vinasses
KW - Substrate for sustainable energy production
UR - http://www.scopus.com/inward/record.url?scp=85108303688&partnerID=8YFLogxK
U2 - 10.2166/wst.2021.176
DO - 10.2166/wst.2021.176
M3 - Artículo
C2 - 34115626
AN - SCOPUS:85108303688
SN - 0273-1223
VL - 83
SP - 2724
EP - 2731
JO - Water Science and Technology
JF - Water Science and Technology
IS - 11
ER -