a system and process for removing contaminants from wastewater where the wastewater is treated into a cleaned water that can be reused or discharged into the environment . the wastewater is transported through purification sections , depending on the system including several of the following : pre - treatment via screening and weirs to remove debris and certain heavy solids ; a second pretreatment via a sump ; strainer ; conductivity solution injection system and electrolytic coagulation system ; polymer injection system ; inline mixers for mixing the polymer in the wastewater stream ; retention tubes for providing residence time for the polymer to react in the wastewater stream ; a multi - stage separation system comprised of a plurality of water separation compartments for consecutively separating contaminants from the wastewater stream by removing contaminants that float and heavy contaminants that settle to the bottom ; and an ozone treatment system . except for the pretreatment sections , each of the treatment sections are contained within an enclosure cabinet that includes controller and control panels as well and feed containers for the conductivity fluid and polymer .