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The ventilation air from mechanical waste treatment plants is contaminated with volatile organic compounds and odour. For the treatment of such air biofilters are usually applied. In this study the separation efficiency of an industrial biofilter was investigated. The separation efficiency of the biofilter for VOCs was significantly lower than the reduction efficiency for odour. This could be attributed mostly to the alkanes, especially the C3-C4 alkanes, contained in the ventilation air. The calculated emission rates for total VOCs and for C3-C4 alkanes were 54 gC per tonne of waste and 17 gC per tonne of waste, respectively.

Volatile Organic Compounds in the Ventilation Air before and After the Biofilter of a Mechanical Waste Treatment Plant