Sustainable Mining and Metallurgy

Urban sludge contains a large number of pathogenic microorganisms, heavy metals and other pollutants, and its output has increased sharply in recent year. If it is not handled properly, it will pollute the environment and endanger human health. At present, Chinas urban sludge disposal methods include landfill, compost, land use, incineration, etc. Sludge incineration is currently the most thorough, rapid, safe and effective method for sludge disposal. This paper summarized the research and application progress of sludge incineration from the aspects of the development history, incineration mode and incineration device, systematically sorted out various influencing factors of sludge incineration process, and compared various indexes and parameters of fluidized bed incinerator, multi-chamber incinerator, rotary kiln incinerator, grate incinerator and other incinerators. Under the background of “double carbon” and in combination with the development trend of sludge resource utilization, it is proposed that mixing urban sludge and waste into derivative fuel, developing circular economy and reducing carbon emissions is also an effective way to reuse the surplus value of urban sludge.