Analysis of Microbiology Test of Air-Conditioning System in Severe Cold Area

Abstract

Central air-conditioning system of Liaoning Provincial Museum has been taken as the target to study microbiology contamination since it is a typical public building. Three AHUs that conduct with different functional areas were considered as testing object in the museum, including constant temperature and humidity AHU B1, B2, and B3. Using microbiological method, six levels of impingement air microorganism sampler, fluorescent optical microscope, high-pressure steam sterilization pot, thermostatic incubator, thermostatic oven, biochemical incubator, and testing instruments are selected to test dust and air, which contain microbial organisms in the AHUs. Results show that the average product dust of the museum is 12.36 g/m²; the dust contains bacterial concentration in the microbiological is 85.2 × 104 cfu/m², the air contains bacterial concentration in the microbiological is 568.19 cfu/m³, and the fungus concentration is 938.37 cfu/m³; the advantage strains in microbiologic is gram-positive bacterium; advantage strains in fungus is penicillium, aspergillums, branch spore mold.