Title:
Transforming Spent Coffee Ground with Combined Physic-chemical and Biological Processes to Enable Economic Waste Valorization
Author(s):
Andhalkar, V., Medina, F., Constantí, M.
Document(s):
Paper
Abstract:
Biological valorization of spent coffee ground waste has emerged as a key alternative for cost-efficient and sustainable biorefineries. The first step in valorization is “pretreatment” which breaks down the recalcitrant structure of this biomass waste to recover its structural components such as cellulose and hemicellulose, which are then converted via fermentation to desired bio-based products. The scientific community is seeking for facile and sustainable pretreatment strategy that can be used at large-scale. The aim of this work was the extraction of hemicellulose and cellulose from the spent coffee grounds by a mechanocatalysis approach at mild conditions, and polyhydroxyalkanoate (PHA) was microbiologically produced with a carbon source of glucose and xylose which solubilized in the hydrolysate from mechanocatalysis. The operating parameters that govern the mechanocatalytic extraction such as milling speed, time, and acid concentration were investigated to optimize the yield of the extraction. Overall, this simple technique would be very useful, as a pretreatment, for the valorization of biomass at a large scale because of its low cost, less use of chemicals, the high production yield of carbohydrates, and less toxic by-products.
Keywords:
sustainability, polyhydroxyalkanoates, mechanocatalysis, spent coffee ground
Topic:
Biomass, Bio-Based Products and Bioenergy Integration
Subtopic:
Strategies for bio-based products in the chemical industry
Event:
31st European Biomass Conference and Exhibition
Session:
3BO.15.3
Pages:
490 - 491
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-3BO.15.3
Price:
FREE
