Harmless treatment and resource utilization of kitchen waste: development status and trend

Kitchen waste has a high content of organic matter, which has a high reusable value. However, the improper disposal of it can easily cause various environmental problems and great harm. Based on the literature, the production and treatment status of kitchen waste in foreign countries, and the construction and treatment capacity of kitchen waste treatment facilities in China were summarized. The characteristics of the kitchen waste in China were analyzed. Three kinds of harmless treatment technologies of kitchen waste in China, including landfill and incineration, feed-based technology and biological treatment technology, were expounded. The characteristics, principles, application conditions, advantages and disadvantages of the main technologies were compared and analyzed. The main process and application status of biological treatment technology, which was the mainstream technology at present, were expounded emphatically. The technical and management problems in the utilization and harmless treatment of kitchen waste were summarized. The future development trend of kitchen waste treatment technology in China was proposed from the aspects of technology and management, such as promoting the optimization and integration of various treatment technologies, implementing the separation and transportation of waste sources, and improving the management system and policies of kitchen waste.