Products» Odor Control Systems»Conventional Biofilters
Conventional Bio-filters have been used for decades now to remove odorous gases in various industries. Bio-filters
utilize certain bacteria that live on a natural substrate made of different kind of mulch and peat moss. The bio-mass
consists of various bacteria type that consumes the odorous gas (i.e. Hydrogen Sulfide or VOC’s) that becomes
absorbed into the moist bio-mass environment.
In case of H2S, which is the predominant odorous gas for waste
water industry, the bacteria require dissolved oxygen to fully
complete the reaction for making Sulfuric Acid as the final product.
Other nutrients required for keeping a healthy and balanced
population of bacteria is usually supplied from the natural
environment of the substrate.
The bio-mass substrate can be place either in a container vessel or built in-ground where the air is distributed evenly
under the filter media by a net work of pipes and then moves upward through the substrate filter. It is necessary to
keep the air fully saturated to prevent drying out of the filter media. Preconditioning of the incoming air by passing
through a humidifying scrubber or spraying water beneath the filter media is therefore required.
This technology is recommended for applications where the concentration of incoming gases are low (a few PPM only!)
and where there is plenty of land available for housing the filter media. Conventional bio-filters are proven useful for
geographical locations where the extreme heat or cold are not prevalent. Due to the nature of the substrate (natural
material) and the high acidity of the byproducts, the media has to be replaced occasionally in a maintenance program
to ensure continuous performance of the system.
Air Pollution
Control & Monitoring
