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The removal characteristics of composite odor and malodorous substances using 33 biofilters in sewage treatment facilities were investigated. The geometry mean values of composite odor and odor quotient were reduced by 52.7% and 59.2% at the outlet of the biofilters, respectively. The removal efficiencies of the biofiltes for the composite odor and odor quotient show a significant difference statistically(p=0.000 and trimethylamine, aldehydes, VOCs and alcohols, organic acids do not.

Odor Removal Characteristics of Biofilters in Domestic Sewage Treatment Facilities Analyzing Composite Odor and Odor Quotient