Affiliation:
1. 1 Laboratory for Research on Advanced Processes for Water Treatment, Unidad Académica Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, 3001 Blvd. Juriquilla, Queretaro 76230, Mexico
Abstract
Abstract
In the wine industry, grape processing is accompanied by waste generation, such as grape stalks, winery wastewater, and grape pomace (GP). GP can be used to produce value-added compounds such as medium-chain carboxylic acids (MCCA). This work aimed to determine the operational conditions (temperature, addition of nutrients, and initial waste concentration) to improve MCCA production using waste GP from the winery industry as a substrate. The electron donor (ethanol) and electron acceptor (acetate) were directly generated from the GP and consecutively used to produce MCCA. The treatment with high concentration, temperature, and nutrient addition promotes caproic acid's maximal yield and concentration (0.11 ± 0.02 g MCCA/g TS). Nutrients’ presence and temperature significantly affected electron acceptor production. The addition of nutrients and 30 °C leads to elevated acetate production. However, at 37 °C, butyrate and MCCA were mainly produced without adding nutrients, and high ethanol consumption was observed. A higher metabolic diversification was observed at 37 °C than at 30 °C. Temperature and nutrient availability significantly affected the metabolic pathway and the type of carboxylic acid produced.
Funder
Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México
Consejo Estatal de Ciencia y Tecnología del Estado de Querétaro
Instituto de Ingeniería, Universidad Nacional Autónoma de México
Consejo Nacional de Ciencia y Tecnología
Subject
Water Science and Technology,Environmental Engineering
Cited by
3 articles.
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