Thermomechanical and Thermo-mechano-chemical Pretreatment of Wheat Straw using a Twin-screw Extruder
Different thermo-mechanical extrusion pretreatments were evaluated as alternatives to traditional biomass pretreatments for lignocellulosic ethanol production. Wheat straw, a commonly available agricultural co-product, was chosen as the substrate model for the study. Five thermo-mechanical pretreatm...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
North Carolina State University
2014-01-01
|
| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_1_Vandenbossche_Thermomechanical_Pretreatment |
| _version_ | 1811308033584660480 |
|---|---|
| author | Virginie Vandenbossche Catherine Doumeng Luc Rigal |
| author_facet | Virginie Vandenbossche Catherine Doumeng Luc Rigal |
| author_sort | Virginie Vandenbossche |
| collection | DOAJ |
| description | Different thermo-mechanical extrusion pretreatments were evaluated as alternatives to traditional biomass pretreatments for lignocellulosic ethanol production. Wheat straw, a commonly available agricultural co-product, was chosen as the substrate model for the study. Five thermo-mechanical pretreatments were evaluated: one purely thermo-mechanical (TM) using just water, and the rest thermo-mechano-chemical (TMC), thus using acid, alkaline, oxidant in alkaline medium, and organic solvent. The parietal constituents, hemicelluloses, cellulose, and lignin were quantified to enable the amounts extracted by the pretreatment to be estimated. The digestibility of cellulose was evaluated by quantifying the hydrolysability with an enzyme cocktail. Water thermomechanical treatment gave strong straw defibration; however the digestibility only attained 35%, whereas ground wheat straw was already 22%. This improvement is insufficient to prepare material for direct enzymatic hydrolysis; thus a combination of the thermo-mechanical and chemical treatment is required. All chemical treatments produced greater improvements in cellulose digestibility. For the acidic treatments, hydrolysability was between 42 and 50%, and reached 89% with alkaline pretreatment. |
| first_indexed | 2024-04-13T09:15:55Z |
| format | Article |
| id | doaj.art-c17c9ce8c82448d7ab329efea3b9819e |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-04-13T09:15:55Z |
| publishDate | 2014-01-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-c17c9ce8c82448d7ab329efea3b9819e2022-12-22T02:52:45ZengNorth Carolina State UniversityBioResources1930-21261930-21262014-01-01911519153810.15376/biores.9.1.1519-1538Thermomechanical and Thermo-mechano-chemical Pretreatment of Wheat Straw using a Twin-screw ExtruderVirginie Vandenbossche0Catherine Doumeng1Luc Rigal2Université de Toulouse,INPT INRA, UMR 1010 Université de Toulouse, INP, Laboratoire de Chimie Agro-industrielle, ENSIACET, 4 Allée Emile Monso, BP 44362, 31030 Toulouse Cedex 4, France; INRA, UMR 1010, Laboratoire de Chimie Agro-industrielle, 31030 Toulouse Cedex 4, France Université de Toulouse, INP, Laboratoire de Chimie Agro-industrielle, ENSIACET, 4 Allée Emile Monso, BP 44362, 31030 Toulouse Cedex 4, France; INRA, UMR 1010, Laboratoire de Chimie Agro-industrielle, 31030 Toulouse Cedex 4, FranceDifferent thermo-mechanical extrusion pretreatments were evaluated as alternatives to traditional biomass pretreatments for lignocellulosic ethanol production. Wheat straw, a commonly available agricultural co-product, was chosen as the substrate model for the study. Five thermo-mechanical pretreatments were evaluated: one purely thermo-mechanical (TM) using just water, and the rest thermo-mechano-chemical (TMC), thus using acid, alkaline, oxidant in alkaline medium, and organic solvent. The parietal constituents, hemicelluloses, cellulose, and lignin were quantified to enable the amounts extracted by the pretreatment to be estimated. The digestibility of cellulose was evaluated by quantifying the hydrolysability with an enzyme cocktail. Water thermomechanical treatment gave strong straw defibration; however the digestibility only attained 35%, whereas ground wheat straw was already 22%. This improvement is insufficient to prepare material for direct enzymatic hydrolysis; thus a combination of the thermo-mechanical and chemical treatment is required. All chemical treatments produced greater improvements in cellulose digestibility. For the acidic treatments, hydrolysability was between 42 and 50%, and reached 89% with alkaline pretreatment.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_1_Vandenbossche_Thermomechanical_PretreatmentWheat strawTwin-screw extruderPretreatmentEnzymatic hydrolysisBio-ethanolAlkalineAcidGlycerolHydrogen peroxide |
| spellingShingle | Virginie Vandenbossche Catherine Doumeng Luc Rigal Thermomechanical and Thermo-mechano-chemical Pretreatment of Wheat Straw using a Twin-screw Extruder BioResources Wheat straw Twin-screw extruder Pretreatment Enzymatic hydrolysis Bio-ethanol Alkaline Acid Glycerol Hydrogen peroxide |
| title | Thermomechanical and Thermo-mechano-chemical Pretreatment of Wheat Straw using a Twin-screw Extruder |
| title_full | Thermomechanical and Thermo-mechano-chemical Pretreatment of Wheat Straw using a Twin-screw Extruder |
| title_fullStr | Thermomechanical and Thermo-mechano-chemical Pretreatment of Wheat Straw using a Twin-screw Extruder |
| title_full_unstemmed | Thermomechanical and Thermo-mechano-chemical Pretreatment of Wheat Straw using a Twin-screw Extruder |
| title_short | Thermomechanical and Thermo-mechano-chemical Pretreatment of Wheat Straw using a Twin-screw Extruder |
| title_sort | thermomechanical and thermo mechano chemical pretreatment of wheat straw using a twin screw extruder |
| topic | Wheat straw Twin-screw extruder Pretreatment Enzymatic hydrolysis Bio-ethanol Alkaline Acid Glycerol Hydrogen peroxide |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_1_Vandenbossche_Thermomechanical_Pretreatment |
| work_keys_str_mv | AT virginievandenbossche thermomechanicalandthermomechanochemicalpretreatmentofwheatstrawusingatwinscrewextruder AT catherinedoumeng thermomechanicalandthermomechanochemicalpretreatmentofwheatstrawusingatwinscrewextruder AT lucrigal thermomechanicalandthermomechanochemicalpretreatmentofwheatstrawusingatwinscrewextruder |