Chemical Physical Wastewater Treatment covers the range of treatment processes that can remove the heavy metals from the water. Chemical Physical treatment generally includes the dosing of suitable chemicals to react with these impurities to form an insoluble precipitate. This precipitate containing the impurity (metals) is then generally removed by sedimentation and filtration.

If undertaken correctly, this process will remove specific impurities and produce a treated water suitable for either discharge or, after appropriate further treatment, for reuse in a wide range of heavy metals industries. Sludge can then generally be treated and dewatered for subsequent disposal.

Process

Industrial wastewater is typically dosed with an alkali to precipitate any unwanted metal hydroxides. This next step involves the precipitation of dissolved particles into flocks. These are removed by sedimentation, thereby reducing the content of suspended solids as well as embedded pollutants. The clarified water is finally passed through filters filled with layers of sand and gravel, removing any final traces of flock and metals. The water produced is often suitable for discharge, as is the sludge after suitable dewatering.

CHEMICALS DOSING STATION