Unrevealing Model Compounds of Soil Conditioners Impacts on the Wheat Straw Autohydrolysis Efficiency and Enzymatic Hydrolysis

Overview

Journal Biotechnol Biofuels

Publisher Biomed Central

Specialty Biotechnology

Date 2020 Jul 21

PMID 32684975

Citations 1

Authors

Xinxing Wu

Wei Tang

Chen Huang

Caoxing Huang

Chenhuan Lai

Qiang Yong

Affiliations

Soon will be listed here.

Abstract

Background: Soil-derived exogenous ash (EA) poses a challenge toward lignocellulosic autohydrolysis due to its buffering capacity. Previous works focusing on this phenomenon have failed to also investigate the role that soluble salts, and organic matter plays in this system. Herein, sodium phosphate and sodium humate were employed as model buffering compounds representing soluble salts and organic matter and dosed into a de-ashed wheat straw (DWS) autohydrolysis process to show the potential impacts of WS attached soil conditioners on the WS autohydrolysis efficiency which would further affect the enzymatic digestibility of autohydrolyzed WS.

Results: Results showed that with the increasing loadings of sodium phosphate and sodium humate resulted in elevated pH values (from 4.0 to 5.1 and from 4.1 to 4.7, respectively). Meanwhile, the reductions of xylan removal yields from ~ 84.3-61.4% to 72.3-53.0% by loading (1-30 g/L) sodium phosphate and sodium humate during WS autohydrolysis lead to a significant decrease of cellulose accessibilities which finally lead to a reduction of the enzymatic digestibility of autohydrolyzed WS from ~ 75.4-77.2% to 47.3-57.7%.

Conclusion: The existence of different types soil conditioner model compounds results in various component fractions from autohydrolyzed WS in the process of autohydrolysis. A lack of sufficient xylan removal was found to drive the significant decrease in enzymatic accessibility. The results demonstrated the various effects of two typical tested soil conditioners on WS autohydrolysis and enzymatic hydrolysis.

Citing Articles

Enhanced hybrid hydrogel based on wheat husk lignin-rich nanocellulose for effective dye removal.

Huang R, Xu Y, Kuznetsov B, Sun M, Zhou X, Luo J Front Bioeng Biotechnol. 2023; 11:1160698.

PMID: 37008025 PMC: 10050590. DOI: 10.3389/fbioe.2023.1160698.

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