Heat-driven hydrothermal conversion technology is a typical thermochemical reaction engineering technology,which can simultaneously achieve the organic waste treatment and resource recovery,providing a vital way to achieve the goal of carbon peaking and carbon reduction.Taking organic waste as the object,this study first combs the overall development of hydrothermal technology,introduces the typical categories and characteristics of hydrothermal conversion technology in organic waste conversion,and expounds the properties of subcritical water and supercritical water.Then,the development of hydrothermal conversion equipment is reviewed.The typical hydrothermal conversion equipment in engineering application is emphasized and the potential problems that need to be focused in equipment development are analyzed.The typical cases of hydrothermal conversion technology in organic waste treatment and resource recovery are dissected.Finally,the existing challenges of hydrothermal conversion of organic waste are discussed,and the equipment corrosion caused by complex water quality in the actual environment,the development of highly efficient catalysts for specific products,the production of process pollutants and the technical and economic feasibility are still the restrictive conditions of this technology.This paper aims to provide theoretical and technical reference for the engineering practice of hydrothermal conversion of organic waste.
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