Development and Demonstration of a Bench-Scale Prototype for the Effective Removal of Selenium in Wastewater

EPA Contract Number: 68D98150
Title: Development and Demonstration of a Bench-Scale Prototype for the Effective Removal of Selenium in Wastewater
Investigators: Downing, Michael W.
Small Business: HYDRO-Solutions and Purification LLC.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1998 through March 1, 1999
Project Amount: $70,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1998) RFA Text |  Recipients Lists
Research Category: Water and Watersheds , SBIR - Water and Wastewater , Small Business Innovation Research (SBIR)


The Enhanced Iron Co-Precipitation process has been successfully demonstrated to effectively remove arsenic from wastewater, by HYDRO-Solutions and Purification, LLC., of Fairbanks, Alaska. This method, which varies significantly from standard iron co-precipitation of arsenic processes, was patented in 1994. The chemical dynamics of other heavy metals, especially selenium, closely resemble those of arsenic. Initial laboratory testing has confirmed that removal of selenium by Enhanced Iron Co- Precipitation is effective, providing the pH and ORP of the process is closely regulated. This project will further define the effective operational parameters, through further laboratory testing, when the process is subjected to conditions expected in the field. A 10 gallon/minute bench-scale prototype will then be constructed and demonstrated at a selected selenium contamination site. The effectiveness of the Enhanced Iron Co- Precipitation process will be measured for both the removal of selenium and the economic factors of capital and operational costs.

Supplemental Keywords:

small business, SBIR, wastewater, engineering, chemistry, EPA., Economic, Social, & Behavioral Science Research Program, Scientific Discipline, Toxics, Waste, Water, Sustainable Industry/Business, National Recommended Water Quality, cleaner production/pollution prevention, Remediation, Wastewater, Environmental Chemistry, Chemistry, Engineering, Hazardous, Engineering, Chemistry, & Physics, Environmental Engineering, Economics & Decision Making, wastewater treatment, contaminated waste sites, economic benefits, Iron Co-Precipitation Process, cost/benefit analysis, Selenium, bench scale, chemical precipitation processes, water quality, contaminant removal, bench scale characterisitcs, cost effectiveness

Progress and Final Reports:

  • Final Report