污泥水热液化工艺参数优化的研究进展

污泥年产量大、处理困难，但因其含有较多的有机物以及较多的氮、磷等营养元素，被认为是一种不可多得的资源。水热液化是针对污泥等高含水废弃物的一种处理手段，其处理过程中各种化合物的形成取决于水热工艺参数。文中介绍了污泥的特点和处理现状，总结了近年来国内外关于污泥水热液化处理的发展历程，并重点综述了污泥水热液化处理的反应机理与影响因素，包括原料参数、液化温度、停留时间、催化剂种类、催化剂用量、气氛条件等。最后，对污泥水热液化处理制备生物油的研究前景进行了展望，认为系统研究各类污泥组分水热液化过程的反应路径、提高生物油自身品质同时降低处理成本、寻找可替代的产物应用途径等是今后污泥水热液化处理的发展方向。

Research Progress on Parameter Optimization of Sludge Hydrothermal Liquefaction Process

Sludge is one of the domestic wastes with high production and undesired substances. However, it is also considered as an energy resource due to its abundant organic matters and other nutrients. Hydrothermal liquefaction (HTL) has been developed recently, which is a kind of green technology concentrated on obtaining clean fuel via high-moisture wastes such as sludge. The formation of various compounds from HTL depends on the operational parameters, for instance, original components in sludge, liquefaction temperature, residence time, type of catalyst, dosage of catalyst and reaction atmosphere. In this review, the characteristics of sludge and its disposal statues are comprehensively introduced, followed by the summarization of the development of HTL on sludge. Meanwhile, the influences of operational parameters on HTL mechanisms are indicated, including the distribution of products and the quality of bio-oil. Finally, the prospects of producing bio oil through HTL of sludge are discussed as three aspects in the future: 1) systematically studying the reaction paths of various components in sludge; 2) improving the quality of bio-oil as well as efficiency; 3) seeking alternative applications of bio-oil derived from sludge.