IDRODEPURAZIONE realizes depuration plants for waste water derived from the washing of car bodies and/or engines. These plants imply three/four treatment phases to depurate water from outdoor car washing by portable and/or tunnel and/or manual devices. 

The phases are:
- separation, by means of a sand collector, of the sand and mould from the liquid mass;
- separation, by means of an oil extractor, of heavy and light mineral oils;
- surface-active agent (detergents) knocking down, by means of an active muds air insufflation biological plant or a chemical-physical plant.
If the recycling of the waste water is to be achieved, these must first undergo a further phase of filtration by sand and coal. 

All the plants are measured to guarantee a discharge complying with the acceptability threshold as provided by the laws in force.