We were contacted by a leading Food Processing Plant in the UK that produces ready meals and cooked poultry products. On-site, the goods undergo several processes, such as marinating, frying, chargrilling, and oven cooking.
These processes lead to the release of Volatile Organic Compounds (VOCs) which are carried in an exhaust air stream and emitted into the atmosphere. A proportion of these VOCs can be odorous, and as such require removal prior to discharging to the atmosphere.
Simdean Group determined that our activated carbon filter technology would be suitable for removing the odorous molecules once integrated into the clients’ extraction system.
Simdean Group designed and supplied a total solution for the client.
Our Technical Team designed an Activated Carbon filtration system that removes contaminants through adsorption. Activated Carbon is a non-hazardous carbon-bearing product with a highly porous structure and a very large internal surface area.
Treatment with Activated Carbon is based primarily on the phenomenon known as adsorption, in which molecules of a liquid or gas adhere to an external or internal surface of a solid substance. Activated Carbon can adsorb approximately 25 percent of its weight in VOCs, making it a very efficient material.
One of the main challenges of this project was that during the production of some cooked meals containing poultry, there would be a release of water vapour; leading to exhaust air being saturated (100% relative humidity). Any reduction in the temperature of the exhaust gases results in condensation of the water from the gas stream.
Carbon adsorption is less effective in situations where the waste gas has a high relative humidity as the water molecules are readily adsorbed by the activated carbon. This reduces the number of available adsorption sites for VOC contaminants.
To reduce the relative humidity of the exhaust gas stream, an air to steam heat exchanger was built into the system. The heat exchanger increases the temperature of the exhaust gases and thus reduces the relative humidity of the gas stream. This means more VOCs can be adsorbed within the carbon unit.
The system is working well, and the client has received no odour complaints from the local residents – a successful installation for the Simdean Group Team, our valued client and importantly the environment.