The Solution for Cleaner Air in the Food Industry – Particle and Odor Removal in Frying

Efficient air purification is essential in frying applications to ensure a clean and sustainable production process. By combining centrifugal particle separation with ColdOx™ technology, both particulate matter and odorous VOC emissions can be effectively removed. This not only improves air quality but also enables heat recovery, reduces maintenance, and lowers energy consumption. Discover how our integrated solution enhances efficiency, minimizes operational costs, and ensures compliance with strict environmental regulations.

The first treatment step in all Frying applications is the removal of particles using a Centrifugal Separator. If further odour removal is needed (the particles carry part of the odour) and/or if VOC removal is required, a CentrOx™ system is used in which the centrifugal separator is integrated with our ColdOx™ technology. The efficient removal of particles allows for heat recovery using highly efficient Heat Exchangers, frequently installed in Frying applications in combination with the cleaning system.

The combination of centrifugal particle separation and oxidation of VOC and odours using the ColdOx™ technology, solves air treatment problems in the most difficult Frying processes, while reducing operation and maintenance cost compared to traditional solutions such as filters, scrubbers and incinerators.

The Centrifugal Separator operates continuously and rapidly evacuates the separated oil particles. The oil can in many cases be returned to the fryer and reused.

In the next step, the energy is recovered from the gas. This is achieved in an efficient heat exchanger that condenses the water vapour in the gas to water, while the heat is transferred to heat users in the factory (pre-heating of oil, blanching, tap water, heating of building etc.) and the water is recovered.

Finally, the gas is treated in the ColdOx™ unit in which gaseous compounds are removed along with the remaining odours.

In Meat Frying, the ColdOx™ treatment step is usually required due the high prevalence of gaseous highly active odour compounds. In Potato and Snack Frying, emission problems are typically more restricted to particle emissions but in certain processes and when restrictions on odour emissions are stringent, a ColdOx™ unit may be required.
In Meat Frying, the proper dimensioning of the Centrifugal Separator system is critical given the small particles in the exhaust gas. In addition, due to the sticky nature of the particles, a CIP™ should be installed to guarantee that the separators are kept clean.

Benefits

• High particle separation performance (100% removal of particles > 1µm)
• Efficient removal of gaseous compounds and odours.
• Low maintenance and maximum process uptime.
• Cleaner piping and reduced fire hazard.
• Low energy consumption
• Efficient heat recovery
• Compact installation

Learn more about industrial odour control here.