Treating Process and Waste Water

In general, the water resulting from slide grinding contains heavy metals and oils, or cannot yet be discharged due to the pH value. Hence, the water cannot be discharged into the public sewer network without first being treated.

The waste water can, e.g., be physicochemical treated and then discharged. It must be taken into account that the respective wastewater treatment plant requires both official approval for operation and a discharge consent.

Alternatively, the water could however be treated via centrifugation, and flocculation if required, and so it could be reused as process water (recycling process). It would then again be available for the slide grinding process.  As a rule, this process does not require official approval, as after an economic service life, the process water is disposed of as liquid waste.
 
In the case of wastewater containing little or no abraded grit, there is furthermore the option of treatment via an evaporator. The generated distillate can either be disposed of or reused.