针对蔬菜废弃物存在处理难、利用率低以及环境污染等问题，将蔬菜废弃物在5个温度梯度下进行水热处理，对固体和液体产物中养分、腐殖化率等肥效指标进行系统分析。结果表明，固体产物的产率、酸碱度、氮磷钾质量浓度等随着温度升高而降低，有机质质量分数在180℃时达到最低值65.21%，腐殖质质量分数和腐殖化率同时在210℃时最大，分别为246.52 mg/g和0.86；液体产物的pH随反应温度的升高而下降，氮磷钾质量浓度随温度升高呈上升趋势，其中有机碳质量浓度在180℃时达到最高值21.09 mg/mL，而液体产物的腐殖酸质量浓度在210℃下达到最大值18.29 mg/mL。蔬菜废弃物在特定温度下进行水热处理可有效提升其养分物质质量浓度，为蔬菜废弃物高效资源化处置提供理论依据。

To address the issues about vegetable wastes such as difficult processing, low utilization rate and environmental pollution, vegetable wastes are treated by hydrothermal treatment method at 5 temperature gradients.The nutrients and humification rate in the solid and liquid products, as well as other fertilizer effectiveness indicators, are thoroughly analyzed after the treatment.The results show that the yield and pH of solid products, and mass concentrations of nitrogen, phosphorus and potassium in solid products decline with increasing temperature while the mass fraction of organic matter in solid products reaches 65.21%, the minimum, at 180℃.Both mass fraction of humus and humification rate in solid products reach the largest at 210℃, being 246.52 mg·g^-1 and 0.86, respectively.The pH of liquid products drops with increasing temperature, while the mass concentrations of nitrogen, phosphorus, and potassium increases with increasing temperature.The mass concentration of organic carbon in liquid products peaks at 21.09 mgmL^-1 at 180℃, while the mass concentration of humic acid in liquid product peaks at 18.29 mgmL^-1 at 210℃.Theoretically, hydrothermally treating vegetable wastes at particular temperature can efficiently improve the mass concentration of nutrients.

张志(1996-),男,硕士研究生,研究方向为固体废弃物资源化,zztx20161023@163.com。