Once the dusts have been filtered in the canister, the airflow passes through the fan and is conveyed inside the Chemsorb® activated carbons purifier, placed under pressure for a better operation and located outside the warehouse. Concerning the purifier, it is essential to clarify that the VOCs emitted by the reactors also include the acetone, that belongs to the ketone group. The last, that has an intrinsic nature, can be subjected to auto ignition phenomena and can cause fires in the plants. The concentrations of acetone are low, but Tecnosida’s® specialists, as per request of the client, have arranged a fire prevention system which can promptly intervene if need be. The plant provides for the use of rate-of-rise detectors that have been added in the purifiers in order to detect any increase in temperature. In case of a sudden increase in temperature, the fire protection system starts the sprinkler which has been designed to pump water into the purifier and quickly extinguish the fire. Besides, any fire is also monitored through a CO detector.