Recent advances in hydrodynamic cavitation-based pretreatments of lignocellulosic biomass for valorization

Xun Sun; Shuai Liu; Xinyan Zhang; Yang Tao; Grzegorz Boczkaj; Joon Yong Yoon; Xiaoxu Xuan

doi:10.1016/j.biortech.2021.126251

Recent advances in hydrodynamic cavitation-based pretreatments of lignocellulosic biomass for valorization

Bioresour Technol. 2022 Feb:345:126251. doi: 10.1016/j.biortech.2021.126251. Epub 2021 Oct 30.

Authors

Xun Sun¹, Shuai Liu², Xinyan Zhang³, Yang Tao⁴, Grzegorz Boczkaj⁵, Joon Yong Yoon⁶, Xiaoxu Xuan²

Affiliations

¹ Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China. Electronic address: xunsun@sdu.edu.cn.
² Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, PR China; National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, PR China.
³ National Engineering Laboratory for Reducing Emissions from Coal Combustion, School of Energy and Power Engineering, Shandong University, Jinan 250061, PR China.
⁴ College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
⁵ Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdańsk University of Technology, Gdańsk 80-233, Poland.
⁶ Department of Mechanical Engineering, Hanyang University, Ansan 15588, Republic of Korea.

PMID: 34728352
DOI: 10.1016/j.biortech.2021.126251

Abstract

Recently, the hydrodynamic cavitation (HC)-based pretreatment has shown high effectiveness in laboratories and even in industrial productions for conversion of lignocellulosic biomass (LCB) into value-added products. The pretreatment capability derives from the extraordinary conditions of pressures at ∼500 bar, local hotspots with ∼5000 K, and oxidation (hydroxyl radicals) created by HC at room conditions. To promote this emerging technology, the present review summarizes the recent advances in the HC-based pretreatment of LCB. The principle of HC including the sonochemical effect and hydrodynamic cavitation reactor is introduced. The effectiveness of HC on the delignification of LCB as well as subsequent fermentation, paper production, and other applications is evaluated. Several key operational factors (i.e., reaction environment, duration, and feedstock characteristics) in HC pretreatments are discussed. The enhancement mechanism of HC including physical and chemical effects is analyzed. Finally, the perspectives on future research on the HC-based pretreatment technology are highlighted.

Keywords: Delignification; Hydrodynamic cavitation; Lignocellulosic biomass; Pretreatment; Process intensification; Sonochemistry.

Publication types

Review

MeSH terms

Biomass
Fermentation
Hydrodynamics*
Lignin*

Substances

lignocellulose
Lignin