4.8 Review

High-solids loading processing for an integrated lignocellulosic biorefinery: Effects of transport phenomena and rheology-A review

Journal

BIORESOURCE TECHNOLOGY
Volume 351, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127044

Keywords

Circular Bioeconomy; Bioprocess; Bioreactor; Enzymatic hydrolysis; Hydrothermal Pretreatment

Funding

  1. Mexican Science and Technology Council (CONACYT, Mexico) [1013711]
  2. National Council for Science and Technology (CONACYT, Mexico) [EP/L014912/1]
  3. EPSRC Centre for Doctoral Training in Bioenergy
  4. [317250]

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This review presents an analysis of the processing of lignocellulosic biomass in high solids conditions, focusing on the biorefinery concept and circular bioeconomy. It discusses various strategies for pretreatment, enzymatic hydrolysis, and fermentation to achieve efficient lignocellulosic bioprocessing.
This review aims to present an analysis and discussion on the processing of lignocellulosic biomass in terms of biorefinery concept and circular bioeconomy operating at high solids lignocellulosic (above 15% [w/w]) at the pretreatment, enzymatic hydrolysis stage, and fermentation strategy for an integrated lignocellulosic bioprocessing. Studies suggest high solids concentration enzymatic hydrolysis for improved sugars yields and methods to overcome mass transport constraints. Rheological and computational fluid dynamics models of high solids operation through evaluation of mass and momentum transfer limitations are presented. Also, the review paper explores operational feeding strategies to obtain high ethanol concentration and conversion yield, from the hydrothermal pretreatment and investigates the impact of mass load over the operational techniques. Finally, this review contains a brief overview of some of the operations that have successfully scaled up and implemented high-solids enzymatic hydrolysis in terms of the biorefinery concept.

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