Bio- and hydrochars from rice straw and pig manure: Inter-comparison.

Liu, Yuxue; Yao, Shuai; Wang, Yuying; Lu, Haohao; Brar, Satinder Kaur et Yang, Shengmao (2017). Bio- and hydrochars from rice straw and pig manure: Inter-comparison. Bioresource Technology , vol. 235 . pp. 332-337. DOI: 10.1016/j.biortech.2017.03.103.

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Résumé

Conversion of rice straw (RS) and pig manure (PM) into chars is a promising disposal/recycling option. Herein, pyrolysis and hydrothermal carbonization were used to produce bio- and hydrochars from RS and PM, affording lower biochar (300–700 °C) and hydrochar (180–300 °C) yields at higher temperatures within the specified range. The C contents and C/N ratios of RS chars were higher than those of PM ones, with the opposite trend observed for yield and ash content. C and ash contents increased with increasing temperature, whereas H/C, O/C, and (O + N)/C ratios decreased. The lower H/C ratio of biochars compared to that of hydrochars indicated greater stability of the former. KCl was the main inorganic fraction in RS biochars, whereas quartz was dominant in PM biochars, and albite in PM hydrochars. Thus, RS is more suitable for carbon sequestration, while PM is more suitable for use as a soil amendment substrate.

Type de document:	Article
Mots-clés libres:	biowaste; biochar; hydrochar; pyrolysis; hydrothermal carbonization
Centre:	Centre Eau Terre Environnement
Date de dépôt:	12 févr. 2018 21:30
Dernière modification:	22 mars 2019 04:00
URI:	https://espace.inrs.ca/id/eprint/5192

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