Assessment of the applied potential of sludge-derived hydrochar in terms of process parameters and product properties

文献类型： 外文期刊

第一作者： Zhang, Chuang

作者： Zhang, Chuang;Wang, Bingyu;Wang, Jixiang;Rong, Shaopeng;Xie, Huifang;Wang, Jixiang;Feng, Yanfang;Qu, Hongxia

作者机构：

关键词： Sludge; Hydrothermal carbonization; Hydrochar; Hydrothermal intensity

期刊名称：COMPTES RENDUS CHIMIE （ 影响因子：0.6； 五年影响因子：1.4 ）

ISSN： 1631-0748

年卷期： 2024 年 28 卷

页码：

收录情况： SCI

摘要： Hydrothermal carbonization (HTC) is beneficial for the disposal of high-moisture organic waste such as sludge. However, the relationship between HTC parameters and hydrochars has not been fully explored, and most studies have focused on single or dual parameters. This paper systematically studied how hydrothermal intensity and solid loading affected the HTC process, hydrochar yield, and composition properties. The results revealed that the organic matter or ash content in sludge was a vital factor affecting the fuel properties of hydrochars. The hydrothermal intensity was a critical process parameter for hydrochars' structural properties. The solid loading had no apparent effect on hydrochars but had a considerable effect on energy consumption in the HTC process. When the moisture content of sludge was 80.3%, the energy recoverable by hydrochars could be sufficient for the material to be heated up to phase transition. Evaluations of sludge characteristics in different regions and treatment processes were conducted, allowing HTC process parameters to be optimized in correlation with future resource utilization approaches. If the sludge contains a great deal of organic matter and is used as a fuel to generate energy, it can be subjected to a milder hydrothermal intensity like 180-220 degrees C for 1-2 h. If the heavy metal content in the sludge meets land-use requirements, a more intense hydrothermal intensity may be applied such as 260 degrees C for 1-4 h. This study provides a reference for the design, optimization, and scaling of HTC for sludge treatment.

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