BRIEF DESCRIPTION OF THE INTERVENTION:
The revamping of the purifier affects the area where the plant currently stands, with replacement and modifications of equipment and pipes.
New civil works concern, in addition to the intermediate lifting and drainage relaunches, exclusively the disc and activated carbon filtration.
The plant in its future configuration will be of the biological type with activated sludge of the HYBRID type, consisting of 6 overall oxidation compartments and divided into two lines (each line consisting of 3 oxidation compartments), with nutrient dosing at the head of the plant.
The first compartment of each line will be of the pure MBBR type without sludge recirculation, the second and third will be of the carrier-free suspended biomass activated sludge type (CAS: Conventional Activated Sludge), but equipped for the future plant upgrading through the addition of carrier. The clarified outgoing product will undergo a tertiary treatment of filtration on discs and treatment on activated carbon filters. The sludge produced will be partly recirculated and partly sent to the paper mill as a surplus.