Evaluation of the influence of ultrasound and supercritical fluids in processes of polyphenolic compounds extraction from agroindustrial wastes

This work demonstrates the potential for obtaining polyphenolic compounds through the use of unconventional technologies: ultrasound assisted extraction and supercritical fluids extraction. The raw material employed in to develop the present work were spent coffee grounds, coffee cut-stems and naran...

Full description

Autores:
Caballero Galván, Ashley Sthefanía
Tipo de recurso:
Fecha de publicación:
2017
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/63889
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/63889
http://bdigital.unal.edu.co/64508/
Palabra clave:
66 Ingeniería química y Tecnologías relacionadas/ Chemical engineering
Extracción asistida por ultrasonido
Extracción con fluidos supercríticos
Residuos agroindustriales
Biorefinerías
Compuestos polifenólicos
Ultrasound assisted extraction
Supercritical fluid extraction
Agroindustrial waste
Biorefineries
Polyphenolic compounds
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
Description
Summary:This work demonstrates the potential for obtaining polyphenolic compounds through the use of unconventional technologies: ultrasound assisted extraction and supercritical fluids extraction. The raw material employed in to develop the present work were spent coffee grounds, coffee cut-stems and naranjilla peel. Where these residues are produced in larg amount in Colombia. In addition, other raw materials from fruit and olive residues were analyzed. For this experimental stage, the physical-chemical characterization of the raw materials was initially carried out. Subsequently, the extraction conditions of chlorogenic acid was theoretically evaluated, in order to determine the best operating conditions. Then, extractions of the compounds of interest were carried out with technologies such as solvent extraction, Soxhlet extraction, ultrasonic assisted extraction and supercritical fluids extraction. This last was realized using CO2 as supercritical fluid. From this, it was determined the influence of each of these technologies in the polyphenolic compounds extraction. As a results were obtained compounds such as chlorogenic acid, ferulic acid, quercetin, vanillin, among others. In addition, these raw materials were used in integrated processes, through the development of different biorefineries. In these analysis were obtained of value-added products such as antioxidants, ethanol, xylitol, furfural and energy generation. Where, the economical, energetic and environmental aspects were evaluated (Texto tomado de la fuente)