Bay Products, Inc. (BPI) is pleased to introduce its full line of biological odor control systems. Just as Bay Products offers a variety of different technologies for odor control (adsorbers and wet scrubbers), BPI also offers a variety of biological systems to fit the needs of a variety of applications.

Each system is flexible in that a variety of medias (compost/wood chips, lava rock, synthetic plastic medias, and long life porous media (BPI’s BioOdorSorb) can incorporated into its design. Thus making unlimited combinations of systems and media.

The basic concept of biofiltration is to have odorous air flow through a media that supports biological active organisms. Organisms specific for the degradation of the specific odorous compounds accumulate on the media and multiply. Temperature, humidity, pH and nutrients are controlled to optimize the multiplication and effectiveness of these organisms.

 Bay Products believes that each project has specific criteria and limitations that must be taken into consideration in order to choose the most effective and efficient biological system. Factors such as capital costs, operational costs, maintenance requirements, irrigation or humidity (moisture) needs, specific compound treatment requirements, space, height, airflow, concentration of odors, and many others that effect the correct system selection.

Bay Products offers five basic system designs for your specific project needs:

OdorDigest Packed Bed (ODPB) – The ODPB model line is the most popular and common of the family of biological filters offered. They are primarily used for lower flow applications such as lift and pump stations and are capable of treating a variety of odorous compounds. It consists of a FRP or HDPE vessel in a variety of sizes with a media support system of a FRP grating and polypropylene screen. Media is placed on the media support and air flows up from the bottom through the media. Moisture is added, if required, either through overhead spray system or an in-line humidifier. The ODPB is available in a variety of medias including compost/wood chips combinations, lava rock, synthetic plastic medias and long life porous media. To help overcome bed compaction problems common with organic medias such as compost/wood chip mixtures, baffles made of FRP or redwood are incorporated to help improve even air distribution.

OdorDigest BioBox (ODBB) – The ODBB model is a staged rectangular compartment design that offers a smaller footprint for a completely integrated system. Air is pulled from the source and pushed to the bottom whereby odorous air enters the humidification compartment of the ODBB and diffuses up through the packing. Spray nozzles deliver water at a rate that increases the humidity to near 100%. Heaters can be added to the humidification compartment to increase the air temperature if required. Humidified air exits the top of the humidifier and enters the biofilter compartment plenum. The humidified odorous air then diffuses down through the biofilter media that supports biological activity. The odors are adsorbed in the biomass of the biological activity and consumed. Additional moisture is added through intermittent overhead spray system. A nutrient feed system adds nutrients to the overhead spray system. The ODBB is available with in a variety of medias including compost/wood chips combinations, lava rock, synthetic plastic medias, and long life porous media. To help overcome bed compaction problems common with organic medias such as compost/wood chip mixtures, grating with lava rock are used to help promote uniformed airflow. This promotes longer media life and reduced pressure drop.

OdorDigest BioTray (ODBT) – The ODBT model is a vessel configuration with trays of media that are easily removed for media replacement or maintenance. Air flows into the bottom or top of the vessel and passes through a series of trays and exists out the top or bottom. Flow direction is dependent on specific application. The top is flanged so that addition of an extension vessel section with extra trays can be added for increased treatment capacity. The ODBT system is designed for low to medium flows such as headworks, pump or lift stations. The number and size of each tray is dictated by the treatment needs and the airflow. Humidity and temperature is added through a separate humidifier/humidifier section and in-line heater. The trays are easily removed through the top of the vessel. In some cases different medias can be incorporated in different trays.