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United States Department of Agriculture

Agricultural Research Service

Title: Water Quality Factors Affecting Bromate Reduction in Biologically Active Carbon Filters

item Kirisits, Mary - UNIV OF ILLINOIS
item Snoeyink, Vernon - UNIV OF ILLINOIS
item Inan, Hatice - UNIV OF ILLINOIS
item Chee Sanford, Joanne
item Raskin, Lutgarde - UNIV OF ILLINOIS
item Brown, Jess - UNIV OF ILLINOIS

Submitted to: Water Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: February 1, 2001
Publication Date: N/A

Interpretive Summary: Bromate can be formed as a disinfection by-product when bromide-containing water is treated with ozone, which is a process to remove residual organic compounds in water treatment systems. Ingestion of drinking water containing bromate can cause tumors. Biologically active carbon (BAC) filters are becoming more attractive in the U.S. for treatment of very low residual concentrations of toxic disinfectants and by-products, and depends on the activities of microorganisms associated with the filters. In this study, we evaluated the conditions that were critical for biological bromate removal to occur. The system was sensitive to high oxygen and nitrate concentrations, but was not affected by sulfate concentrations. Oxygen, nitrate, and sulfate are likely to be present in water prior to treatment and discharge at treatment facilities. The type of organic compounds naturally present in water also affected the amount of bromate removal. Maintaining pH conditions close to neutral was also more effective. This study demonstrated that effective bromate removal could be achieved if key conditions are controlled.

Technical Abstract:

Last Modified: 10/1/2014
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