Co-hydrothermal carbonization of lignocellulosic biomass and swine manure: Hydrochar properties and heavy metal transformation behavior

•Co-HTC of SM and different lignocellulosic biomass was carried out.•The presence of lignocellulosic biomass promoted dehydration reaction during HTC.•Synergistic effects occurred between SM and lignocellulosic biomass during co-HTC.•The concentration and bioavailability of HMs in SM were decreased...

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Bibliographic Details
Published in:Bioresource technology 2018-10, Vol.266, p.242-248
Main Authors: Lang, Qianqian, Guo, Yanchuan, Zheng, Qingfu, Liu, Zhengang, Gai, Chao
Format: Article
Language:English
Subjects:
aromatization
bioavailability
biomass
carbon
carbonization
Co-hydrothermal carbonization
energy
fuels
Heavy metal
heavy metals
hydrochars
lignocellulose
Lignocellulosic biomass
pig manure
Swine manure
Synergistic effect
technology
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Summary:•Co-HTC of SM and different lignocellulosic biomass was carried out.•The presence of lignocellulosic biomass promoted dehydration reaction during HTC.•Synergistic effects occurred between SM and lignocellulosic biomass during co-HTC.•The concentration and bioavailability of HMs in SM were decreased by co-HTC.•The hydrochar from co-HTC was an alternative solid fuel with improved quality. Co-hydrothermal carbonization (HTC) of lignocellulosic biomass and swine manure (SM) was conducted, and the hydrochar properties and transformation behavior of heavy metals (HMs) were investigated in this study. The results showed that co-HTC with lignocellulosic biomass promoted the dehydration of SM and enhanced the aromatization of the hydrochar. Compared to the hydrochar from SM, the carbon content, higher heating value and energy yield of the hydrochar from co-HTC were significantly increased, reaching the maximum of 57.05%, 24.20 kJ/kg and 80.17%, respectively. Significant synergy occurred between lignocellulosic biomass and SM during co-HTC and different lignocellulosic biomass exhibited similar influence on the synergy. Additionally, the concentration and bioavailability of HMs in the hydrochar from co-HTC were decreased in comparison to SM. These findings suggested that co-HTC with lignocellulosic biomass offered an effective approach to convert SM into clean solid fuel with remarkably improved fuel properties.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2018.06.084