|Type of industry||Métallurgy|
|Objectives||The dye penetration test operation consists in putting on the parts' area some penetrative coloured agents which allow to eventually find out crackles. Before control, all products parts are washed to eliminate all the excess dye penetrating. This washing process produces an aqueous effluent which is very pollutant and as to be treated by a specialised plant (expensive service).|
To retain the main part of the polluting molecules and produce a water containing small traces of those pollutants, which are fixed then captured by active carbon filters.
During the separation, the product is fractionated in two phases :
– the filtrate, which is constituted of clear water, wich represents more than 98% of the filtrated effluents by volume and can be discharged to a sewerage plant or recycled after being filtered by the active carbon filter.
– the concentrate, low volume, which contains the main part of the fluorescent penetration test agents constituents can be stored for final destruction by incineration.
– active coal consumption reduced up to 60 %.