Main futures

The systems for dispersing the paint aspirated from paint spray booths produce highly polluted waste water. The maintenance of dispersers requires frequent cleaning and change of washing water to avoid the formation of incrustations. The SPRUZZO SED systems produced by S.C. allow to totally recycle the water from the dispersers once it has been subject to a treatment of clarification through chemical flocculation. This reduces both the polluting load conveyed to the waste water treatment and the time needed to maintain and clean the dispersing system.

Technical features
SPRUZZO SED systems operate in a continuous flow mode and can be connected in parallel to hide spray painting systems. Thanks to its high treatment capacity, the same system can used for more than one booth in which case two tanks (not supplied) of adequate capacity are installed. The first one is used to contain the water to be treated and is therefore loaded with the water from the spray booths at the beginning of every working day. The second tank is used as accumulation of treated water used to re-fill the dispersers. This way the SPRUZZO SED operates completely independently of the dispersers and there are no operational interferences between the recycling system and the spraying lines.

SPRUZZO SED Systems are composed of a double reaction tank and of a powder flocculant dispensing group. The water containing pigments and resins reaches the first flocculation tank where the chemical product is added and from there are passes to the second reaction tank where the flocculation process is completed. The paint particles are aggregated and can be separated by decantation. The flocculated particles fall towards the bottom while the purified water spills out and returns to the initial accumulation point. The sludge which has formed on bottom of the decanter is aspirated and sent to a filter press where it will be compacted into cakes ready for disposal.

Running the system
Running cost mainly consist of the flocculant purchasing cost. The amount of flocculant required is based on the calculation of the overspray, that is the percentage of paint that does not stick to the hide and is aspirated by the product dispersing system. Given an average overspray value (30-50%) the following values can considered:
For 100 kg of dry paint we have the follow consumption values:

  • From 1,5 to 2,5 kg of flocculant
  • average overspray : 50% of the product

Technical features

Technical drawings

A: spray paint booths
B: accumulation of water to be treated
C: powder dispenser
D: reactor / sedimentation tank
E: filter press
F: accumulation of treated water
G: sludge tank