Systems and methods for treating aqueous fluids and their associated methods of use are disclosed. In one embodiment, a system for treating an untreated aqueous fluid with a first concentration of a contaminant to produce a treated water with a second concentration of the contaminant, is provided, wherein the system comprises a chemical treatment subsystem comprising a chemical agent, wherein the chemical treatment subsystem precipitates at least a portion of the contaminant from the aqueous fluid; and a mechanical treatment subsystem comprising a centrifugal separator, wherein the mechanical treatment subsystem removes at least a portion of the precipitated contaminant from the aqueous fluid.