厨余垃圾的水热碳化：固体和水溶液产物分析及水热炭在稻田土壤中的应用。
Hydrothermal carbonization of kitchen waste: An analysis of solid and aqueous products and the application of hydrochar to paddy soil.
机构信息
Research Center for Global Changes and Ecosystem Carbon Sequestration & Mitigation, College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China; Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
出版信息
Sci Total Environ. 2022 Dec 1;850:157953. doi: 10.1016/j.scitotenv.2022.157953. Epub 2022 Aug 10.
Hydrothermal carbonization (HTC) technology can potentially be used to safely and sustainably utilize kitchen waste (KW). However, the characteristics of HTC solid products (hydrochar) and aqueous products (HAP) based on different types of KW have not yet been clarified. Here, four types of KW, cellulose-based (CL), skeleton-based (SK), protein-based (PT), and starch-based (ST) KW, were used for HTC at 180 °C, 220 °C, and 260 °C. The basic physicochemical properties and structures of hydrochars and HAP were analyzed, and the effects of different hydrochars on rice growth were characterized. HTC decreased the H/C and O/C of KW. All hydrochars were acidic (3.12 to 6.78) and the pH values increased with the HTC temperature, while high HTC temperature reduced the porosity of hydrochars. HTC promoted the enrichment of total carbon (up to 78.1 %), total nitrogen (up to 62.6 %), and total phosphorus (up to 171.6 %) in KW. More carbon (60.7-88.0 %) and nitrogen (up to 87.4 %) were present in the hydrochars than in the HAP. The relative content of C increased and O decreased in CL and ST hydrochars as the HTC temperature increased, while the opposite pattern was observed for SK and PT hydrochars. The dissolved organic matter (DOM) of different hydrochars and HAP were mainly humus-like substances. The biodegradability of the DOM in HAP was often higher than the corresponding hydrochar, and their DOM biodegradability increased with the HTC temperature. The content of heavy metals from different hydrochars did not exceed the relevant thresholds of fertilizer standards. Rice grain yield increased by 3.7-11.1 % in the hydrochar treatments without phosphate fertilizer addition compared with the control treatment. The results of this study provide new theoretical and empirical insights into the potential for HTC technology to be used for the recycling of KW and its products in the agricultural environment.
水热碳化（HTC）技术可用于安全、可持续地利用厨余垃圾（KW）。然而，基于不同类型 KW 的 HTC 固体产物（水碳化产物）和水相产物（HAP）的特性尚未得到明确。在这里，使用四种类型的 KW，即基于纤维素的（CL）、基于骨架的（SK）、基于蛋白质的（PT）和基于淀粉的（ST）KW，在 180°C、220°C 和 260°C 下进行 HTC。分析了水碳化产物和 HAP 的基本理化性质和结构，并表征了不同水碳化产物对水稻生长的影响。HTC 降低了 KW 的 H/C 和 O/C。所有水碳化产物均呈酸性（3.12 至 6.78），且随着 HTC 温度的升高 pH 值增加，而高温 HTC 降低了水碳化产物的孔隙率。HTC 促进了 KW 中总碳（高达 78.1%）、总氮（高达 62.6%）和总磷（高达 171.6%）的富集。与 HAP 相比，水碳化产物中含有更多的碳（60.7-88.0%）和氮（高达 87.4%）。随着 HTC 温度的升高，CL 和 ST 水碳化产物中的 C 相对含量增加，O 减少，而 SK 和 PT 水碳化产物则呈现相反的模式。不同水碳化产物和 HAP 中溶解有机物（DOM）的主要成分是腐殖质样物质。HAP 中 DOM 的生物降解性通常高于相应的水碳化产物，且其 DOM 生物降解性随 HTC 温度的升高而增加。不同水碳化产物中重金属的含量均未超过肥料标准的相关阈值。与对照处理相比，在不添加磷酸盐肥料的水碳化产物处理下，水稻籽粒产量提高了 3.7-11.1%。本研究结果为 HTC 技术在农业环境中回收 KW 及其产物的潜力提供了新的理论和经验见解。
Zotero 插件