Combined use of steam explosion, alkali, and microbial methods improving the yield, structure and properties of soluble dietary fiber from bamboo shoot shells

Yu Wang; Jie Tong; Ting Wang; Ruotong Ma; Mariem Elmalki; Dandan Li; Chuang Li; Zhenglian Xue; Xu Fang; Guangjun Nie

doi:10.1016/j.foodchem.2025.142754

Combined use of steam explosion, alkali, and microbial methods improving the yield, structure and properties of soluble dietary fiber from bamboo shoot shells

Food Chem. 2025 Jan 4:471:142754. doi: 10.1016/j.foodchem.2025.142754. Online ahead of print.

Authors

Yu Wang¹, Jie Tong¹, Ting Wang¹, Ruotong Ma¹, Mariem Elmalki¹, Dandan Li², Chuang Li³, Zhenglian Xue⁴, Xu Fang⁵, Guangjun Nie⁶

Affiliations

¹ College of biological and food engineering, Anhui Polytechnic University, 241000 Wuhu, China.
² College of biological and food engineering, Anhui Polytechnic University, 241000 Wuhu, China; Wuhu Hight Biotechnology Co., Ltd, 241000 Wuhu, China; Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, 241000 Wuhu, China.
³ College of biological and food engineering, Anhui Polytechnic University, 241000 Wuhu, China; Wuhu Hight Biotechnology Co., Ltd, 241000 Wuhu, China; Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, 241000 Wuhu, China. Electronic address: lichuang@ahpu.edu.cn.
⁴ College of biological and food engineering, Anhui Polytechnic University, 241000 Wuhu, China; Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, 241000 Wuhu, China.
⁵ State Key Laboratory of Microbial Technology, Shandong University, 266237 Qingdao, China.
⁶ College of biological and food engineering, Anhui Polytechnic University, 241000 Wuhu, China; Wuhu Green Food Industry Research Institute Co., Ltd., 241000 Wuhu, China; Wuhu Hight Biotechnology Co., Ltd, 241000 Wuhu, China; Anhui Engineering Laboratory for Industrial Microbiology Molecular Breeding, 241000 Wuhu, China. Electronic address: ngjason@ahpu.edu.cn.

PMID: 39798368
DOI: 10.1016/j.foodchem.2025.142754

Abstract

Developing an effective method for extracting soluble dietary fiber (SDF) from bamboo shoot shell (BSS) is of great significance for the resource utilization of BSS. Here, we proposed the combinational strategy of steam explosion (SE), alkaline extraction (AE), and microbial extraction (ME) to enhance BSS-SDF yield. The highest yield of 28.28 % was achieved, and the properties of SDF were improved as follows: 1.4 g/g oil holding capacity (OHC), 0.61 g/g water holding capacity (WHC), 1.56 mmol/g glucose adsorption capacity (GAC), 87 % ABTS+ scavenging capability, and 74 % DPPH⋅ scavenging capability. The mechanism of the strategy was uncovered to understand the synergic effects on SDF production. SE destroyed lignin molecules and promoted AE to further hydrolyze the molecules of lignin and hemicellulose, resulting in a sparse and porous architecture. This is beneficial for Lactobacillus to utilize insoluble dietary fiber to make smaller size of SDF with various structures. Hopefully, the findings will be generalized in other SDF production.

Keywords: Alkaline extraction; Bamboo shoot shell; Microbial extraction; Soluble dietary fiber; Steam explosion.