The need to obtain tangible improvements in the washing process quality, combined with the desire to reduce its water consumption and make more efficient use of resources, has led Inver-Valspar to integrate its powder coating production process with a waste water treatment plant.

The system installed by Inver-Valspar, SEDFLOC 500, is able to treat approximately 500 litres of water in a continuous mode. It is equipped with automatic dosing and operating systems, and consists of:

A clariflocculation and sedimentation station made in AISI 304 steel consisting of two tanks with a capacity of about 50 l each, complete with an electric mixer and a truncated cone shaped sedimentation tank equipped with a stirrer to remove the sludge. It is 1,000 mm wide, 1,400 mm long and 1,670 mm high.

– A 20-l pneumatic dosing unit for the flocculant powder, made in AISI 304 steel and complete with a screw pump.
– A PVC flow metre complete with valves for regulating the flow rate in the plant.
– A submersible pump to feed the plant with the water to be treated.
– A pneumatic sludge pump, complete with a pneumatic closing valve.
– A sludge container in AISI 304 steel (850 mm long, 850 mm large and 950 mm high) complete with a drained water release valve and with rings for the handling operations with a forklift.
– A belt filter (850 mm large) for the filtration of the clarified water.
– A containment tank for the paper fragments from the belt filter.
– A 100-l plastic booster tank for the clarified water, complete with a 220 V booster pump.
– An electrical-electromechanical panel complete with protection systems for the pumps and the minimum and maximum level float switches for the control of the plant operation.

Read the full article on ipcm® International Paint&Coating Magazine n. 32.