State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
Zhejiang Development & Planning Institute, Hangzhou, China.
Sci Total Environ. 2022 Sep 10;838(Pt 1):155900. doi: 10.1016/j.scitotenv.2022.155900. Epub 2022 May 16.
Food waste (FW) poses serious challenges to incineration and composting. Hydrothermal treatment (HTT) is a promising method to produce carbon-rich materials from biomass, including humus substances. In this study, FW containing cellulose, starches, and proteins was treated by HTT to study the formation and regulation of three kinds of humus (i.e., humin, humic acids [HAs], and fulvic acids [FAs]). Ultimate analysis and proximate analyses were conducted to explore the material composition, which was very similar to natural humus. Three kinds of humus were quantified. Optimal temperature (200 °C) and residence time (30 min) for production of HAs were determined based on HAs yield (14.60%). In addition, formation and regulation of humin, HAs and FAs was discussed. The amino acids, peptides, monosaccharides, and HMF obtained by hydrolysis of FW produced important precursors of humus. Moreover, the transfer of nutrient elements was revealed. Nearly 90% of K was dissolved in water. Recovery of N (60%) was relatively stable in hydrochar. Up to 67.61% of P deposited in hydrochar with 12 h.
食物垃圾（FW）对焚烧和堆肥构成了严重挑战。水热处理（HTT）是一种很有前途的从生物质中生产富碳材料的方法，包括腐殖质物质。在这项研究中，FW 中含有纤维素、淀粉和蛋白质，通过 HTT 进行处理，以研究三种腐殖质（即腐殖质、腐殖酸[HA]和富里酸[FA]）的形成和调节。通过终极分析和近似分析来研究材料组成，其与天然腐殖质非常相似。定量了三种腐殖质。根据 HA 产量（14.60%）确定了生产 HA 的最佳温度（200°C）和停留时间（30 分钟）。此外，还讨论了腐殖质、HA 和 FA 的形成和调节。FW 水解得到的氨基酸、肽、单糖和 HMF 是腐殖质的重要前体。此外，还揭示了营养元素的转移。近 90%的 K 溶解在水中。氮（60%）在水热炭中的回收相对稳定。高达 67.61%的 P 沉积在 12 h 的水热炭中。
