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Corresponding Author(s)

李玮（1967—），女，西南林业大学教授，博士。E-mail：[email protected]

Abstract

Walnut, characterized by its high nutritional value and substantial market demand, has become a globally significant economic crop. However, the intrinsic hardness of the shell and its tight adhesion to the kernel pose considerable challenges to efficient shell breaking and kernel extraction, making this process a critical bottleneck in industrial production. The walnut shell -breaking and kernel extraction process generally encompasses two fundamental stages:shell fragmentation and subsequent shell -kernel separation. This paper systematically reviews the current state of walnut shell -breaking and kernel extraction technologies and analyzes the advantages and limitations of conventional manual and mechanical shell -breaking methods, alongside emerging technologies such as microwave -, ultrasonic -, and laser -assisted shell breaking. Furthermore, recent progress in shell -kernel separation technologies are discussed, with a particular emphasis on advances in physical sorting techniques and intelligent sorting approaches.

Publication Date

11-3-2026

First Page

222

Last Page

229

DOI

10.13652/j.spjx.1003.5788.2025.80804

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