Modular Chemical and Biological Air Scrubber

Reference image showing a modular pig house exhaust air treatment arrangement; supplied configuration is project-specific.

The Modular Chemical and Biological Air Scrubber treats collected exhaust air from mechanically ventilated pig houses before outdoor discharge. A chemical wet-scrubbing stage targets ammonia and airborne dust. Where additional odor control is required, a downstream biological stage can be incorporated.

The number of treatment modules, air connections and service equipment can be planned around the ventilation capacity and layout of a commercial pig farm. The system is suitable for new pig farm construction and for retrofits where the existing ventilation arrangement allows exhaust air to be routed through the scrubber.

• Modular treatment capacity designed according to pig house exhaust airflow.
• Chemical washing stage for ammonia and dust reduction.
• Optional biological filter stage for further odor reduction.
• Recirculating wash-water circuit with controlled chemical dosing and managed blowdown.
• Droplet separation between treatment stages to limit liquid carryover.
• Prefabricated sections that support transport, site assembly and future expansion planning.
• Corrosion-resistant housing, piping and wetted components selected according to the project environment.

• Exhaust-air connection: Ductwork or a pressure corridor linking the pig house fans to the treatment modules.
• Chemical scrubber modules: Spray distribution, contact media and collection sections for wet treatment.
• Droplet separator: Removes entrained wash-water droplets before the next stage.
• Optional biological modules: Moist filter media that support microorganisms involved in odor reduction.
• Technical equipment: Recirculation pumps, tanks, dosing equipment, sensors, pipework and control cabinet according to the selected design.
• Service access: Openings and working space for inspection, cleaning and media maintenance.

Exhaust fans move pig house air into the chemical modules. The air contacts circulating, acidified wash water across the spray and packing sections, transferring ammonia into the liquid and capturing part of the airborne dust. A droplet separator then limits moisture carryover.

If specified, the air continues through a moist biological filter where microorganisms help reduce remaining odor-causing substances. The treated air is discharged outdoors. The chemical and biological water circuits are arranged separately according to the final process design.

• Product type: Modular chemical wet scrubber with optional biological stage
• Primary application: Mechanically ventilated pig house exhaust air
• Target pollutants: Ammonia and dust; additional odor reduction with the biological stage
• Design airflow and module quantity: According to project requirements
• Housing and wetted materials: Customizable for humid, chemically demanding farm environments
• Water circulation and dosing: Designed according to treatment capacity and process requirements
• Monitoring and controls: pH, conductivity, water level, pump status and alarms according to configuration
• Dimensions, utilities and performance targets: Available upon request after project assessment

• Commercial pig finishing, nursery and breeding facilities with suitable mechanical ventilation.
• Multi-house pig farm projects requiring coordinated exhaust air treatment.
• New steel structure livestock buildings where ducts and scrubber connections can be included in the initial design.
• Existing pig houses undergoing ventilation or emission-control upgrades.
• Projects requiring treatment of all collected exhaust air or a defined portion of the exhaust airflow.

Module count, chemical and biological stage arrangement, duct connection, control functions, service layout and materials can be customized. The final design should account for maximum and minimum ventilation rates, available installation space, local climate, farm conditions and applicable emission requirements.

Coordinate the scrubber with the pig house ventilation design before installation. Confirm fan capacity against the complete system pressure loss, and plan the foundation, duct seals, water supply, drainage, electrical connections, chemical storage and safe service access. Prefabricated sections can be assembled beside the building and connected to the exhaust-air route.

Routine service includes checking spray nozzles, packing, droplet separators, pumps, sensors and water circuits. Maintain the specified wash-water chemistry, remove deposits and manage blowdown water according to local requirements. Biological media must remain adequately moist and supplied with airflow for stable operation.

Can the scrubber be installed on an existing pig house?
Yes, subject to an assessment of the existing fans, duct routing, structural space and utility connections.

Is the biological stage required for every project?
No. It can be specified when the project also calls for additional odor reduction.

How is system capacity determined?
Module quantity and equipment sizing are selected from the pig house ventilation design, treatment targets and site conditions.

Gallery images illustrate related equipment and installation concepts; project equipment may differ.