Production and characterization of cellulose powders from brewery' spent grain

Name: Kawalee Kumpangnil

Organization : King Mongkut's University of Technology North Bangkok. Faculty of Applied Science

Name: Sasithorn Kongruang

Organization : King Mongkut's University of Technology North Bangkok. Faculty of Applied Science

Email : sasithorn.k@sci.kmutnb.ac.th

keyword: Spent grains

LCSH: Cellulose

; Food processing byproducts

LCSH: Brewery wastes

; Sustainable materials

LCSH: Powders

LCSH: Biomass conversion

LCSH: Renewable natural resources

Abstract: Brewery Spent Grain (BSG) is a byproduct of the brewing industry, primarily consisting of cellulose, hemicellulose, lignin, and protein sourced from malted barley. Although often discarded as waste, BSG holds untapped potential as animal feed and contains valuable cellulose, which is applicable across various industries like food, pharmaceuticals, and cosmetics. This study aims to optimize the extraction process to produce cellulose from BSG. We used the Box-Behnken Design to find the best combination of three important factors to get the most cellulose: temperature (90–100 °C), alkaline concentration (1–2% w/v NaOH), and extracting time (1-3 h). The extracted cellulose samples were then bleached with H2O2 at 70 °C for 40 min, followed by washing and drying to obtain pure cellulose powders. The result found that the cellulose yield was 10.89 with 60.32% crystallinity under 1.69% w/v alkaline concentration at 100 °C and 1 hour of extracting time. The assessment of the structural features and bonds, with a particular emphasis on eliminating undesirable components of lignin and hemicellulose via Fourier transform infrared (FT-IR) analysis, It was revealed that a strong, sharp lignin stretching vibration positioned at 1633 cm-1 (C=stretching) of lignin was reduced by 34.70% compared with the untreated BSG. 11% reductions of lignin (aromatic skeletal vibration) and hemicellulose (COO-stretching) were also observed. These purified cellulose powders were further analyzed using X-ray diffraction (XRD) to determine crystallinity and obtained 59.22% cellulose purity, while the cellulose powder standard gained 65.85% of crystallinity. This research contributes to the value-added of BSG and its potential integration into the wider food industry, opening new possibilities for its use beyond traditional waste disposal

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2024

Modified: 2024-12-09

Issued: 2024-12-09

BibliograpyCitation : In Kasetsart University. Faculty of Science. The Pure and Applied Chemistry International Conference 2024 (PACCON 2024) (pp.953-957). Bangkok : Kasetsart University, 2024

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