RT info:eu-repo/semantics/article
T1 Hydraulic retention time as an operational tool for the production of short-chain carboxylates via anaerobic fermentation of carbohydrate-rich waste
A1 Aboudi, Kaoutar
A1 Greses, Silvia
A1 González Fernández, María Cristina
K1 Anaerobic fermentation
K1 Hydraulics
K1 Hidráulica
K1 Short Chain Fatty Acids
K1 Fatty acids
K1 Acidos grasos
K1 Carboxylates
K1 Carbohydrates
K1 Glúcidos
K1 Chain elongation
K1 3303 Ingeniería y Tecnología Químicas
K1 3308 Ingeniería y Tecnología del Medio Ambiente
K1 2306 Química Orgánica
K1 2302.12 Fermentación
AB The carboxylate platform is a sustainable and cost-effective way to valorize wastes into biochemicals that replace those of fossil origin. Short-chain fatty acids (SCFAs) are intermediates generated during anaerobic fermentation (AF) and are considered high-value-added biochemicals among carboxylates. This investigation aimed to produce SCFAs through the AF of sugar beet molasses at 25 °C and semi-continuous feeding mode in completely stirred tank reactors. A particular focus was devoted to the role of hydraulic retention time (HRT) variation in SCFAs production and distribution profile. The highest SCFAs concentration (44.1 ± 2.3 gCOD/L) was reached at the HRT of 30 days. Caproic acid accounted for 32.5–35.5% (COD-concentration basis) at the long HRTs of 20 and 30 days due to the carbon chain elongation of shorter carboxylic acids. The findings of this study proved that HRT could be used to steer the anaerobic process toward the targeted SCFAs for specific uses. Furthermore, the successful operation at low-temperature conditions (i.e., 25 °C) makes the process economically promising.
PB MDPI
SN 1420-3049
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/66808
UL https://uvadoc.uva.es/handle/10324/66808
LA eng
NO Molecules, 2023, Vol. 28, Nº. 18, 6635
NO Producción Científica
DS UVaDOC
RD 24-nov-2024