期刊
BIORESOURCE TECHNOLOGY
卷 235, 期 -, 页码 332-337出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.03.103
关键词
Biowaste; Biochar; Hydrochar; Pyrolysis; Hydrothermal carbonization
资金
- International Science & Technology Cooperation Program of China [2014DFE90040]
- Science and Technology Project of Zhejiang Province [2015C03004]
- Zhejiang Provincial Natural Science Foundation of China [LY16D010004, LQ17D020002]
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 degrees C) and hydrochar (180-300 degrees 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. (C) 2017 Elsevier Ltd. All rights reserved.
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