Odor Reduction Using Activated Carbon Dosing

To effectively reduce odors generated during the production process, we designed and implemented an advanced filtration technology utilizing the sorption method—specifically, the dosing of micronized activated carbon as a sorbent. This technology offers an efficient and environmentally friendly solution for eliminating VOCs (volatile organic compounds) and other odor traces from exhaust air.

1. System Principle of Operation

The core of the technology is the use of sorption on a solid sorbent, where activated carbon or zeolite captures odor compounds from the flowing exhaust air. The sorbent is dosed cyclically into the system via an automated dosing station, ensuring regular replacement and maximum filtration efficiency.

The air stream passes through a Jet BAG filter unit, where it is captured on a textile filter medium with a layer of activated carbon. This layer acts as a reaction zone where absorption and decomposition of VOCs and odors occur.

2. System Technological Components

• Modification of extraction points on extruders: The original extraction nozzles were replaced with adjustable suction hoods, allowing optimal positioning of suction directly at emission sources.

• Sorbent dosing station: A fully automated unit allows precise dosing of micronized activated carbon into the central duct leading to the filter. Dosage can be set according to operational needs or the type of processed material.

Jet BAG Filter Unit

• Contains high-efficiency textile filter media.

• Air is actively drawn through the sorbent layer by a powerful fan.

• When the sorbent is saturated, automated regeneration using compressed air pulses releases the used sorbent from the filter layer and transfers it to a waste big-bag.

• A new sorbent layer is then automatically applied.

• Exhaust duct and control: Cleaned air is discharged outdoors via a duct system. System control allows for adjustment of extraction intensity and sorbent exchange frequency, optimizing the process for the specific operation.

3. Calibration and Process Optimization

To ensure effective and economical operation, the system can be initially calibrated by continuously measuring VOC concentrations in the exhaust air. Based on these measurements, the optimal sorbent replacement interval is set, maximizing sorbent usage and ensuring compliance with emission limits.

4. Solution Benefits

• Significant reduction of odor and VOC emissions without the need for chemical air treatment.

• Fully automated operation with minimal operator requirements.

• Quick adjustment of settings in response to changing operating conditions.

• Low operational demands due to recycling and controlled sorbent replacement.

• High filtration efficiency, verified by test measurements.