Cement plants used for waste disposal or processing thumb|Used tyres being fed to a pair of cement kilns Due to the high temperatures inside cement kilns, combined with the oxidising (oxygen-rich) atmosphere and long residence times, cement kilns are used as a processing option for various types of waste streams; indeed, they efficiently destroy many hazardous organic compounds. The waste streams also often contain combustible materials which allow the substitution of part of the fossil fuel normally used in the process.
Cement plants used for waste disposal or processing thumb|Used tyres being fed to a pair of cement kilns Due to the high temperatures inside cement k,ilns combined with the oxidising (oxygen-rich) atmosphere and long residence times, cement kilns are used as a process,ing option for various types of waste streams; indeed they efficiently destroy many hazardous organic compounds. The waste streams also often contain combustible materials which allow the substitution of part of the fossil fuel normally used in the process