Activated carbon, once saturated with undesired target substances, can be thermally regenerated to restore its original adsorption characteristics. Comelt Reactivation Plant consists essentially in a rotary kiln in which activated carbon is brought to high temperature, in absence of air. The adsorbed substances turn then into gases and are sent into an afterburner where are successively burnt in presence of extra air (pyrolysis). Comelt Reactivation Activity consists in recovery ( operation code: R7) of special waste, both dangerous and not dangerous, based on exhausted activated carbons coming from waste water treatment plants, solver recovery plants and food industries. The service also includes the stock of the waste in the plant itself, all functional to R7 activity.
Reactivation can be in general summarized in the following steps:
Phase 1: collection of exhausted activated carbon from the customer
Phase 2: reactivation
Phase 3: restitution of regenerated activated carbon to the customer.
For those carbons originating from water treatment ( both potable and waste) , phase 1 is executed by handling the carbon with water, namely sending it, as water suspension being moved through pumps, ejectors, pipes etc. to a truck purposely equipped for draining the support water. Once this phase is completed , wet activated carbon can be transported to the reactivation plant where, always through a hydraulic system, is unloaded in the temporary stock silo. After reactivation and consequent drying (phase 2), activated carbon is returned in 1 m3 big bags and reloaded in customers’ filters (phase 3). From a logistic point of view, the activity above described is about transporting wet activated carbon and returning it to the customer after regeneration and drying. Activated carbon coming from gas air treatment plants are sent to Comelt Reactivation Plant packed in 1 m3 big bags and returned in the package requested by the customer ( paper bags or big bags)