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    Physical pretreatment of woody biomass or wood size reduction is a prerequisite step for further chemical or biochemical processing in forest biorefinery. However, wood size reduction is very energy intensive which differentiates woody biomass from herbaceous biomass for biorefinery. This chapter discusses several critical issues related to wood size reduction: (1) factors affecting mechanical energy consumption and the post-pretreatment wood size-reduction approach to significantly reduce energy consumption, (2) biomass substrate specific surface area for substrate size characterization and the wet imaging technique for woody substrate size/specific surface measurements, (3) the effect of biomass substrate size/specific surface on enzymatic cellulose hydrolysis, and (4) the concept of substrate “surface productivity” for the determination of optimal degree of size reduction and energy efficient wood size reduction.

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    Zhu, J.Y. 2011. Physical pretreatment – woody biomass size reduction – for forest biorefinery. In: Sustainable production of fuels, chemicals, and fibers from forest biomass: Chapter 4. Washington, DC : American Chemical Society, c2011. ACS symposium series ; 1067: p. 89-107: ISBN: 9780841226432 (alk. paper): 0841226431 (alk. paper)


    Sugars, biomass energy, ethanol, biomass, utilization, pretreatment, hydrolysis, lignocellulose, biodegradation, enzymes, biotechnology, industrial applications, fuelwood, cellulose, wood chips, energy conservation, lignin, feedstock, energy consumption, forest biomass, milling machinery, disk milling, biomass fuel, saccharification, bioconversion, biorefining, alcohol, chips, chemical utilization, biofuels, wood as fuel, surface area, wet imaging, size reduction, size characterization

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