Abstract: Method for treating iron-contaminated water using a treatment approach identified herein as the Activated Iron Solids (AIS) Process. The AIS process is capable of oxidizing and removing iron as iron oxides from iron-contaminated waters producing a clean effluent. The AIS process is performed in a single or multiple tank system in which high concentrations of AIS are suspended through mechanical mixing to maintain a catalytic surface chemistry environment that increases iron removal thousands times faster than would naturally occur and hundreds times faster than existing arts (e.g., aerobic pond passive treatment). The AIS process can utilize inexpensive alkaline material (such as, pulverized limestone) where initial mine drainage alkalinity (mg/L as CaCO3) to ferrous iron (mg/L) ratio is less than approximately 1.7.

Abstract: Method for treating iron-contaminated water using a treatment approach identified herein as the Activated Iron Solids (AIS) Process. The AIS process is capable of oxidizing and removing iron as iron oxides from iron-contaminated waters producing a clean effluent. The AIS process is performed in a single or multiple tank system in which high concentrations of AIS are suspended through mechanical mixing to maintain a catalytic surface chemistry environment that increases iron removal thousands times faster than would naturally occur and hundreds times faster than existing arts (e.g., aerobic pond passive treatment). The AIS process can utilize inexpensive alkaline material (such as, pulverized limestone) where initial mine drainage alkalinity (mg/L as CaCO3) to ferrous iron (mg/L) ratio is less than approximately 1.7.

Abstract: The present invention is a method and system for treating iron-contaminated water (e.g., mine drainage) using an innovative treatment approach identified herein as the Activated Iron Solids (AIS) Process. The AIS process is capable of oxidizing and removing iron as iron oxides from iron-contaminated waters (such as, mining-related discharge, groundwater, surface water and industrial waste streams) producing a clean effluent. The AIS process is performed in a single or multiple tank system in which high concentrations of AIS are suspended through mechanical mixing to maintain a catalytic surface chemistry environment that increases iron removal thousands times faster than would naturally occur and hundreds times faster than existing arts (e.g., aerobic pond passive treatment). The AIS process can utilize inexpensive alkaline material (such as, pulverized limestone) where initial mine drainage alkalinity (mg/L as CaCO3) to ferrous iron (mg/L) ratio is less than approximately 1.7.

Abstract: The present invention is a method and system for treating iron-contaminated water (e.g., mine drainage) using an innovative treatment approach identified herein as the Activated Iron Solids (AIS) Process. The AIS process is capable of oxidizing and removing iron as iron oxides from iron-contaminated waters (such as, mining-related discharge, groundwater, surface water and industrial waste streams) producing a clean effluent. The AIS process is performed in a single or multiple tank system in which high concentrations of AIS are suspended through mechanical mixing to maintain a catalytic surface chemistry environment that increases iron removal thousands times faster than would naturally occur and hundreds times faster than existing arts (e.g., aerobic pond passive treatment). The AIS process can utilize inexpensive alkaline material (such as, pulverized limestone) where initial mine drainage alkalinity (mg/L as CaCO3) to ferrous iron (mg/L) ratio is less than approximately 1.7.

Abstract: The present invention is a method and system for treating iron-contaminated fluids. The system and method facilitates and uses an approach described herein as an activated iron sludge sequencing batch reactor (“AIS/SBR”) process. The AIS/SBR method oxidizes and removes ferrous iron as iron oxides from iron-contaminated fluids (such as mining-related discharge water, groundwater, surface water and industrial waste streams) and produces an effluent that is substantially devoid of iron and meets standards appropriate for natural discharge or further treatment. The AIS/SBR method of the present invention can be conducted in a single container assembly unit of the present invention, with time-controlled processing, to perform oxidation, precipitation and settling of iron from fluids. The method optionally includes the addition of alkaline material (e.g., limestone) when the initial liquid alkalinity (mg/L as CaCO3) to ferrous iron (mg/L) ratio of the fluid to be treated is less than approximately 1.7.