Microwave-assisted one-pot conversion of agro-industrial wastes into levulinic acid: An alternate approach. (October 2018)

• Record Type: Journal Article
• Authors: Maiti, Sampa; Gallastegui, Gorka; Suresh, Gayatri; Pachapur, Vinayak Laxman; Brar, Satinder Kaur; Le Bihan, Yann; Drogui, Patrick; Buelna, Gerardo; Verma, Mausam; Galvez-Cloutier, Rosa
• Is Part Of: Bioresource technology. Volume 265(2018)
• Page Start: 471
• Page End: 479
• Publication Date: 2018-10
• Subjects: Agro-industrial waste -- Microwave-assisted synthesis -- Levulinic acid -- Response surface methodology; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.06.012
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Agro-industrial wastes as promising renewable feedstocks for levulinic acid production. Microwave-assisted one-pot conversion of renewable feedstock to levulinic acid. Screening of renewable feedstocks for optimization of levulinic acid production. Optimization of process parameters for enhanced levulinic acid production. Abstract: Brewery liquid waste (BLW), brewery spent grain (BSG), apple pomace solid wastes (APS), apple pomace ultrafiltration sludge (APUS) and starch industry waste (SIW) were evaluated as alternative feedstocks for levulinic acid (LA) production via microwave-assisted acid-catalyzed thermal hydrolysis. LA production of 204, 160, 66, 49 and 12 g/kg was observed for BLW, BSG, APS, APUS, and SIW, respectively, at 140 °C, 40 g/L substrate concentration (SC), 60 min and 2 N HCl (acid concentration). Based on the screening studies, BLW and BSG were selected for optimization studies using response surface methodology. Maximum LA production of 409 and 341 g/kg for BLW and BSG, respectively were obtained at 160 °C, 4.5 M HCl, 85 g/L SC and 27.5 min. Results demonstrated the possibility of using brewery wastes as promising substrates for economical and higher yield production of LA, a renewable platform chemical and versatile precursor for fuels and chemicals.