Iron and Manganese Removal by Oxidation

During experimental treatment of ground water from well 118 ultraviolet light and ozone UVOZ, precipitation of iron and manganese oxides occurred. The oxides were found to interfere with the process because of their opacity. The possibility of removing iron and manganese in a feedwater pretreatment process has been investigated. The process envisioned would have utilized the unreacted ozone vented from the UV03 process other oxidizing agents were not considered because of their higher cost relative to the ozone available in the vent gas. Although the pretreatment process is technically feasible, several tank-agitator sets would be required in conjunction with a vent gas compressor and auxiliary instrumentation. Instead of the pretreatment process, a simpler scheme is proposed that would consist only of a recirculation loop through a filter. Fluid from UV03 unit would be filtered and returned to the unit so that substantially all the precipitates would be removed as formed.