4.8 Article

Biochar produced by combining lignocellulosic feedstock and mushroom reduces its heterogeneity

Journal

BIORESOURCE TECHNOLOGY
Volume 355, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127231

Keywords

Mushroom cultivation; Lignocellulose; Homogeneity; Physicochemical properties; Performance stability

Funding

  1. Department of Science and Tech-nology of Sichuan Province [2022YFN0027, 2021ZYD0099, 2021ZDZX0012]

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By using mushrooms as precursors for biochar preparation, the heterogeneity of biochar can be reduced, resulting in more homogeneous properties and performance.
To reduce the feedstock-sourced heterogeneity of biochar, mushrooms, cultivated from lignocellulosic feedstocks (LFs), were used as precursors for biochar preparation. The coefficient of variation (CV) was adopted to show the homogeneity changes. In contrast to LFs, mushrooms produced relatively lower CVs in terms of elemental and proximate analysis. Furthermore, the CV of H/C (9.20%) and O/C (13.32%) of mushroom-based biochars (MRBCs) was lower than that of LF-based biochars (LFBCs), suggesting more homogeneous aromaticity and hydrophilicity. The relatively lower CV of the volatile matter (0.87%), fixed carbon (0.45%), and ash (2.44%) of MRBCs suggested an improvement in the homogeneity of chemical components. The homogenized physical structure was reflected in the lack of a difference in pore characteristics of MRBCs. The lower CVs (1.89-14.82%) for the pollutant adsorption of MRBCs, implied more stable performance. In conclusion, converting LFs to mushrooms reduced the precursor's heterogeneity, consequently homogenizing the biochar's properties and performance.

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