Abstract: A combined equipment scrubbing cooking fumes was employed and thermal desorption and GC-MS were used to analyze the organic components in cooking fumes. The results showed that the main pollutants of cooking fumes were acrolein, octanone and octanal, and their relative intensity were 100, 70 and 85, respectively. Simulated cooking fumes was washed by water, activated sludge and AC-activated sludge, and the results showed that the removed efficiency of the combined equipment scrubbing cooking fumes was good. The mass spectrographic peaks at outlet was obviously less than inlet of the device, and the chromatographic peak area was clearly decreased. It was found that the device could remove most of the matter from the cooking fumes, and ideal effects were achieved. When the flow of cooking fumes was 1.6 m³/h, the temperature of waste oil heated was 160 ℃, the washing liquid volume was 20 L, the device runs 9 hours every day and runs for 22 days, the removal efficiency were 49.6%, 66.2% and 83.5%, respectively when washed by water, activated sludge and AC-activated sludge. The purifying efficiency of AC-activated sludge was better than water and activated sludge due to the absorption of AC and the excellent microbial degradation on cooking fumes.

Key words: cooking fumes, chemical composition analysis, washing treatment, activated sludge