Patent ID: 8512571

Claim:
A system for removing ferrous iron from an iron-contaminated fluid comprises: a. At least one first tank for receiving the fluid wherein said first tank is constructed of a material selected from the group consisting of steel, concrete and plastic, said tank having at least one means of ingress and egress of fluid; b. means of transporting the fluid into said first tank; c. means of aerating and mixing the fluid in said first tank to suspend activated iron solids at concentrations in excess of 200 mg/L as iron thereby creating a catalytic oxidation environment dominated by a heterogeneous ferrous iron oxidation process; d. means of decanting substantially iron-free supernatant fluid from said first container without disturbing settled iron oxides; and e. means of controlling the volume and temporal duration of fluids transported in and out of said first container, aerating and mixing the fluid in said first tank, and maintaining the fluid in a quiescent state in the first tank, wherein said means for controlling provides aeration and suspension of iron oxide solids during a heterogeneous ferrous iron oxidation process reaction cycle, and said quiescent state to allow then activated iron solids to settle and be stored for subsequent reaction cycles, to maintain said concentrations.