<prompt> Sputum is disinfected by -FilterationHypochlorideIncineaionIonizing radiation  <response>: Disinfection of sputum is by incineration.incineration is a high temperature dry oxidation process,that reduce organic and combustible waste ti inorganic incombustible matter.REF.PARKS TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 21 edition. PAGE NO-731,743 