Waste aseptic packagings were disintegrated (end size 10-20 mm) and combusted in a fluidized sand bed reactor at 900 degrees C to study the combustion course and compn. of flue gases. Two steps were distinguished in the process (carbonization with flame combustion and heterogeneous combustion with disintegration of solid particles). Some amts. of CH4, CH2=CH2, CHE equivalent to CH, naphthalene and PhH were obsd. in the flue gas.