Biofilter media mixtures were compared in 18 pilot-scale biofilters treating pit gases from a swine facility. The compost and wood chips mixtures ranged from 100% wood chips to a 50-50 blend in 10% increments. The effect of three media moisture contents (low, medium, and high) on biofilter performance was also evaluated. Odor and hydrogen sulfide reduction did not change significantly for mixtu...

A new type of biofilter packed with composite carriers was designed for tertiary denitrification of the secondary effluent with removal of both oxidized nitrogen and suspended solids (SS). At the empty bed residence time of 15 min and organic carbon to nitrate nitrogen (C/NO3-N) ratios of 2, 1.5 and 1 g/g, the removal percentage of NO3-N was 67%, 58% and 36% in the ethanol biofilter, and was 61...

This paper presents the response of peat biofilters to loading changes corresponding to industrial practices such as overnight and weekend shutdowns, intermittent emission or inlet concentration peaks. Three laboratory-scale reactors fed with air contaminated with ethyl acetate, toluene or a 1:1 mixture of ethyl acetate and toluene were operated under 65 g m h inlet load and 60 s EBRT during 16...

A literature study was conducted to compare the feasibility of biofilters and biotrickling filters for the treatment of complex odorous waste air containing hydrogen sulfide (H2S), organic reduced sulfur compounds, and chlorinated and nonchlorinated volatile organic compounds (VOCs). About 40 pilot-plant studies and full-scale applications at wastewater treatment plants and other facilities wer...

For its small square footage, a vertical bed biofilter was developed for odor emission mitigation livestock facilities with limited area available installation. However, concern about the design is that airflow and moisture may be poorly distributed across due to effects of gravity. Relevant data are sporadic in literature. To fill knowledge gap, two biofilters were constructed at university sw...

Experimental evaluation of a diffusion reaction model (part 1) for the determination of both steady-and transient-state behavior of biofilters for waste air biotreatment is presented. The model, applied to the aerobic biodegradation of methyl ethyl ketone (MEK) and methyl isobutyl ketone (MIBK) vapors from air as single and as mixed pollutants, proved appropriate for describing most of the expe...

Creative solutions to manage stormwater include ecologically based designs, such as biofilter structures. A laboratory experiment was established study the ability of biofilters remove nutrients, metals, total suspended solids (TSS), and organic C originating from roadside melted snow. Special attention paid removal P. In addition, fate microplastics (MPs) in followed. The materials selected fo...