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Hydrolytic pre-treatment methods for enhanced biobutanol production from agro-industrial wastes.

Maiti, Sampa; Gallastegui, Gorka; Suresh, Gayatri; Sarma, Saurabh Jyoti; Brar, Satinder Kaur; Drogui, Patrick; LeBihan, Yann; Buelna, Gerardo; Verma, Mausam; Soccol, Carlos Ricardo (2017). Hydrolytic pre-treatment methods for enhanced biobutanol production from agro-industrial wastes. Bioresource Technology . DOI: 10.1016/j.biortech.2017.09.132.

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Résumé

Brewery industry liquid waste (BLW), brewery spent grain (BSG), apple pomace solid wastes (APS), apple pomace ultrafiltration sludge (APUS) and starch industry wastewater (SIW) have been considered as substrates to produce biobutanol. Efficiency of hydrolysis techniques tested to produce fermentable sugars depended on nature of agro-industrial wastes and process conditions. Acid-catalysed hydrolysis of BLW and BSG gave a total reducing sugar yield of 0.433g/g and 0.468 g/g respectively. Reducing sugar yield from microwave assisted hydrothermal method was 0.404 g/g from APS and 0.631 g/g from APUS, and, 0.359 g/g from microwave assisted acid-catalysed SIW dry mass. Parameter optimization (time, pH and substrate concentration) for acid-catalysed BLW hydrolysate utilization using central composite model technique produced 307.9 g/kg glucose with generation of inhibitors (5-hydroxymethyl furfural (20 g/kg), furfural (1.6 g/kg), levulinic acid (9.3g/kg) and total phenolic compound (0.567 g/kg)). 10.62 g/L of acetone-butanol-ethanol was produced by subsequent clostridial fermentation of the substrate.

Type de document: Article
Mots-clés libres: agro-industrial wastes; pre-treatment; microbial inhibitors; central composite design; kinetic modelling; ABE fermentation
Centre: Centre Eau Terre Environnement
Date de dépôt: 28 nov. 2017 14:47
Dernière modification: 28 nov. 2017 14:47
URI: http://espace.inrs.ca/id/eprint/6370

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