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In order to carry out an experimental investigation a biological air-treatment device was used, namely, a biofil- ter with a charge of a different origin composed of zeolite, foam and wood chips. When mixing foam and zeolite together with wood chips for air treatment from volatile organic compounds, not only a biological but also adsorptive air-treatment method is used. Using complex treatment technologies the device efficiency and the charge service period are improved. The investigation has shown that microorganisms, being predominant in the bio-treatment process, can breed in charges of on inorganic origin made of natural zeolite and foam. While cultivating spontaneous microorganism associations in the charge, biofilter treatment efficiency was determined to be dependent on the sort of the supplied pollutant, concentration and filtration period. The charge filtration function was most efficient at a velocity of 0,1 m/s when the device was sup- plied with acetone-polluted air. Cleaning air from acetone, when the original concentration of the pollutant was 103 mg/m 3, the filter treatment efficiency reached 95%. When the concentration of pollutants supplied into the biofilter is

journal of environmental engineering and landscape management

INVESTIGATION OF CLEANING EFFICIENCY OF BIOLOGICAL AIR‐TREATMENT DEVICE WITH ACTIVATED CHARGE OF DIFFERENT ORIGIN/BIOLOGINIO ORO VALYMO ĮRENGINIO SU AKTYVINTA SKIRTINGOS KILMĖS ĮKROVA VALYMO EFEKTYVUMO TYRIMAI/ ИССЛЕДОВАНИЕ ЭФФЕКТИВНОСТИ УСТАНОВКИ ДЛЯ БИОЛОГИЧЕСКОЙ ОЧИСТКИ ВОЗДУХА С АКТИВИРОВАННОЙ ЗАГРУЗКОЙ РАЗЛИЧНОГО ПРОИСХОЖДЕНИЯ