title: Pretreatment of cashew apple bagasse using protic ionic liquids: Enhanced enzymatic hydrolysis.
abstract: To enhance the enzymatic digestibility of cashew apple bagasse (CAB) feedstock in order to produce sugar fermentation-derived bioproducts, the CAB was subjected to three different pretreatments with the ionic liquid 2-hydroxyl-ethylammonium acetate (2-HEAA) and characterized by FTIR, NMR and chemical methods. All conditions were able to delignify CAB, however the best lignin removal (95.8%) was achieved through the method performed with 8.7% w/w of CAB/2-HEAA ratio at 130°C for 24h. Although the cellulose crystallinity has been increased in CAB treated with the ionic liquid, but this fact did not influence its digestibility. Nevertheless, the pretreatment with 2-HEAA enhanced significantly the cellulose digestibility, increasing the glucose yield from 48 to 747.72mgglucose/gCAB. Furthermore, 2-HEAA pretreatment was efficient even with reused ionic liquid, obtaining high glucose concentration.
authors.affiliation: Departamento de Engenharia Química, Universidade Federal do Ceará, Campus do Pici, Bloco 709, Fortaleza, CE, Brazil.
authors.forename: Carla Luzia Borges
authors.initials: CLB
authors.lastname: Reis
authors.affiliation: Embrapa Agroindústria Tropical, Rua Doutora Sara Mesquita, 2270 - Pici, CEP 60511-110 Fortaleza, CE, Brazil.
authors.forename: Lorena Mara Alexandre E
authors.initials: LMAE
authors.lastname: Silva
authors.affiliation: Embrapa Agroindústria Tropical, Rua Doutora Sara Mesquita, 2270 - Pici, CEP 60511-110 Fortaleza, CE, Brazil.
authors.forename: Tigressa Helena Soares
authors.initials: THS
authors.lastname: Rodrigues
authors.affiliation: Departamento de Engenharia Química, Universidade Federal do Ceará, Campus do Pici, Bloco 709, Fortaleza, CE, Brazil.
authors.forename: Anne Kamilly Nogueira
authors.initials: AKN
authors.lastname: Félix
authors.affiliation: Departamento de Engenharia Química, Universidade Federal do Ceará, Campus do Pici, Bloco 709, Fortaleza, CE, Brazil.
authors.forename: Rílvia Saraiva de
authors.initials: RS
authors.lastname: Santiago-Aguiar
authors.affiliation: Embrapa Agroindústria Tropical, Rua Doutora Sara Mesquita, 2270 - Pici, CEP 60511-110 Fortaleza, CE, Brazil.
authors.forename: Kirley Marques
authors.initials: KM
authors.lastname: Canuto
authors.affiliation: Departamento de Engenharia Química, Universidade Federal do Ceará, Campus do Pici, Bloco 709, Fortaleza, CE, Brazil. Electronic address: valderez.rocha@ufc.br.
authors.forename: Maria Valderez Ponte
authors.initials: MVP
authors.lastname: Rocha
mesh_terms: D000085:Acetates / Q000737:chemistry; D031021:Anacardium / Q000737:chemistry* / Q000378:metabolism; D001709:Biotechnology / Q000379:methods*; D002480:Cellulase / Q000737:chemistry / Q000378:metabolism; D002482:Cellulose / Q000737:chemistry / Q000378:metabolism; D019856:Ethanolamine / Q000737:chemistry; D005947:Glucose / Q000737:chemistry / Q000378:metabolism; D006868:Hydrolysis; D007220:Industrial Waste; D052578:Ionic Liquids / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000085:Acetates; D007220:Industrial Waste; D052578:Ionic Liquids; D019856:Ethanolamine; D002482:Cellulose; D008031:Lignin; C027433:bagasse; D002480:Cellulase; D005947:Glucose
keywords: Carbohydrates; Cashew apple bagasse; Cellulose digestibility; Protic ionic liquid; Reuse