Water treatment

Suspended Material

ACR™ robots operate together with a multi stage water treatment system that allows for cleaning of the water, depending on the allowable discharge level stipulated and the chemical make up of the concrete including impurities.

Suspended materials and particle bound impurities are purified by minimizing particles in the water. The need for different purification steps depends on the size of the particles.

• Level 1: Larger particles can be separated with a packed sedimentation container (lamella separator).
• Level 2: For more stringent requirements regarding fine particle removal, a flocculant can be introduced to the flow, thereby binding the small particles in clusters that are removed in the sedimentation container.
• Level 3: Finally, for very high requirements, a sand-filter can be added after these first two steps.

Other Pollutants

In rare cases, organic and water-soluble impurities are present in the concrete. If this is the case additional treatment must be applied:

• Organic pollutants: Organic pollutants such as chlorinated solvents, petroleum pollutants and PAHs are effectively purified using activated carbon.
• Suspended material: These occur as ions, e.g. arsenic, chromium, zinc, cadmium, copper and mercury, do not bind to organic materials, but must be chemically bound. This can be managed using ion exchange material, which binds the ions by being charged with + or – depending on the type of ion exchange mass used.