Application of products derived from pyrolysis and hydrothermal carbonization as conditioners for aerobic composting produced multiple beneficial effects: Evaluation based on 10-ton pilot scale trials

文献类型： 外文期刊

第一作者： Feng, Yuanyuan

作者： Feng, Yuanyuan;Tang, Qingtong;Feng, Yuanyuan;Tang, Qingtong;Wang, Lisha;Jin, Hongmei;Feng, Yanfang;Xue, Lihong;Xie, Wenping;Yu, Jie;Zhang, Mingchao;Wang, Bingyu;Xie, Huifang;Bo, Luji

作者机构：

关键词： Pyrochar; Hydrochar; Hydrothermal carbonization aqueous phase; Aerobic composting; Compost quality

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 505 卷

页码：

收录情况： SCI

摘要： Carbon-based conditioners such as pyrochar (BC), hydrochar (HC) and hydrothermal carbonization aqueous phase (HAP) demonstrate potential in agricultural applications. However, research has largely been confined to small-scale laboratory experiments, without simulating the practical processes in large-scale compost production. Systematic studies regarding their impacts on the aerobic composting process and products at the pilot scale remain largely unexplored. This study conducted a pilot scale trial by adding 5 % (w/w) of BC, HC and HAP into 10-ton composting systems, and evaluated their effects on compost characteristics. Results showed that BC significantly increased the total carbon (TC) content by 3.1-10.5 % throughout the composting cycle. HC increased compost phosphorus pentoxide content by 8.3-22.9 % relative to BC. HAP significantly enhanced the compost humification index, with increases of similar to 12.2 % over BC and similar to 10.1 % over HC, and raised the fulvic acid content by 13.5-20.1 % compared to other treatments. Random forest and structural equation modelling confirmed that, in addition to compost pH and moisture, compost carbon content (i.e., dissolved organic carbon and TC) was the critical driver of seed germination index in BC- and HC-treated compost, respectively. Economic evaluations revealed that HAP treatment yielded the highest profit at 14.6 $ t(-1), followed by HC (12.1 $ t(-1)). These findings systematically evaluated the application effects of carbon-based conditioners in a 10-ton pilot scale composting trial, scaling up from laboratory to industrial levels, providing a direct basis for the advancement of global sustainable agriculture.

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