Hydrothermal carbonization of waste wet biomass achieves resource cycling: Regulating nutrient availability and generating economic benefits
文献类型： 外文期刊
第一作者： Ma, Yaxin
作者： Ma, Yaxin;Wang, Yimeng;Xie, Huifang;Wang, Bingyu;Ma, Yaxin;Wang, Yimeng;Ji, Yahui;Huang, Wang;Feng, Yanfang;Xue, Lihong;Jiang, Yue;Ji, Yahui;Ji, Yahui;Cao, Jiazhen;Cao, Jiazhen
作者机构：
关键词： Biomass feedstock; Hydrothermal carbonization; Hydrochar; Nutrient; Sustainable development
期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）
ISSN： 2213-2929
年卷期： 2025 年 13 卷 2 期
页码：
收录情况： SCI
摘要： Natural nutrient cycling through waste biomass presents a promising solution to food production challenges, yet the potential of hydrothermal carbonization (HTC) technology in recycling waste wet biomass resources remains largely unexplored. In this study, pig manure (PM) and invasive plants (Solidago canadensis) were used as feedstocks, with magnesium citrate as a catalyst, to investigate the physicochemical properties and nutrient transformation of HTC products. The results showed that magnesium citrate facilitated the nutrient cycling of waste biomass. Magnesium citrate addition increased the pH and carbon content while reducing the ash content of hydrochars, which was more conducive to the application in agricultural soils. In addition, it enhanced the degree of charring of hydrochars, facilitating the hydrolysis of proteins, cellulose, and hemicellulose. This process increased the available nitrogen (NH4+-N, NO3- -N) and the relative proportion of stabilized phosphorus in hydrochars while promoting the further stabilization of organic nitrogen. Based on PM production data in China, magnesium-added HTC products could substitute up to 33.8 % of compound fertilizers and replace an average of 79.9 % of phosphorus fertilizers. Economic modeling showed that the maximum profit per ton of PM could be as high as RMB 987.2. This study highlights the key role of HTC technology in sustainable agriculture through effective biomass management and resource utilization.
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