Hydrolysis of high concentration lignocellulose suspensions with a cumulative feeding strategy: rheometry and morphogranulometry

Tien-Cuong Nguyen 1, * Dominique Anne-Archard 2 Véronique Coma 3, 4, 5 Xavier Cameleyre 1 Eric Lombard 1 Kim Anh To 6 Tuan Le 1, 6 Luc Fillaudeau 1
* Corresponding author
1 LISBP - Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés
2 IMFT - Institut de mécanique des fluides de Toulouse
3 Bordeaux INP - Institut Polytechnique de Bordeaux
4 ENSCPB - Ecole Nationale Supérieure de Chimie et de Physique de Bordeaux
5 LCPO - Laboratoire de Chimie des Polymères Organiques
6 School of Biotechnology and Food Technology
Abstract : Bioconversion of lignocelluloses is currently a major challenge if biorefining operations are to become commonplace. The objectives of the present work were to understand and describe the evolution of physical properties of lignocellulose suspensions during enzyme-based hydrolysis reaction. Experimental set-up and methodology were developed in order to carry out a multiscale study of the lignocellulosic materials under high dry content. In-situ and ex-situ rheometry and morpho-granulometry measurements were used to investigate transfer limitations (Fig. 1). Rheological behaviour was modelled and critical concentrations (Ccrit) inducing a sharp increase of viscosity were identified with Whatman paper (WP, 35 gdm/L) and paper pulp (PP, 31 gdm/L) [1]. In a first step, hydrolysis experiments demonstrate that single dimensionless viscosity-time curves, µ*=f(t*), could be established for each substrates. Analysing hydrolysis experiments lead to assume an optimal feed rate Q* linked to the critical concentration. In a second step, cumulative feeding strategies (up to 10%w/w) were conducted for WP and PP with different ratios Q/Q*. Results report the evolution of viscosity, hydrolysis rate (Fig. 2) and mean particle size. Mixing power during suspension and hydrolysis steps are discussed as a function of hydrolysis rates.
Keywords : Hydrolysis Lignocellulose Viscosity Particle size Bioconversion
Document type :
Conference papers
Complete list of metadatas
https://hal.archives-ouvertes.fr/hal-01886482
Contributor : Archive Ouverte Prodinra <>
Submitted on : Tuesday, October 2, 2018 - 8:15:26 PM
Last modification on : Thursday, November 21, 2019 - 9:58:51 AM

Identifiers

  • HAL Id : hal-01886482, version 1
  • PRODINRA : 435811

Collections

CNRS | INRA | UNIV-BORDEAUX | INSA-TOULOUSE | INSA-GROUPE | INC-CNRS | UNIV-TLSE3 | TBI

Citation

Tien-Cuong Nguyen, Dominique Anne-Archard, Véronique Coma, Xavier Cameleyre, Eric Lombard, et al.. Hydrolysis of high concentration lignocellulose suspensions with a cumulative feeding strategy: rheometry and morphogranulometry. 10. European Symposium on Biochemical Engineering Sciences (ESBES), Sep 2014, Lille, France. ⟨hal-01886482⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

37

CONTACT

scd.ao@univ-tlse3.fr