Emerging and Innovative Technologies

Oral

394789 - Removal of Removal of Disinfection By-Products from Water Using a Hybrid Bio-filter Made of Sand and Low-cost Activated Carbon Derived from Coconut Shells

Monday, June 4
2:00 PM - 3:30 PM
Location: Lakeshore C
Co-Authors: Md Ashique Ahmed, Ruston, Louisiana – Louisiana Tech University; Chandra Mouli Tummala, Ruston, Louisiana – Louisiana Tech University; Brian Elkins, Ruston, Louisiana – Louisiana Tech University

Disinfection byproducts (DBPs) are a family of chemicals formed when disinfectants react with naturally occurring organic matter and other substances in the source water. The levels of DBPs depend upon the nature of the source water, the types of water treatment to remove organic matter, and types and concentrations of disinfectants used. Haloacetic acids (HAAs) and trihalomethanes (THMs) are some of main DBPs.

Most of the research regarding DBPs has been focused on surface water systems rather than groundwater systems. However, many water systems in northcentral Louisiana, typically pumping water out of the Sparta aquifer, are recording DBPs in concentrations in excess of the maximum-contamination-level allowed by the U.S. Environmental Protection Agency. Small towns and rural water systems lack financial and technical resources to maintain complex treatment facilities and therefore need simple and economical solutions.

The project is using naturally occurring microorganisms in the surface water to improve water quality. Under optimum conditions, including relatively low turbidity and high oxygen content, the organisms break down material in the water and thus improve water quality. A combination of sand and low-cost activated carbon derived from coconut shells is used to provide a support on which these microorganisms grow. The removal of some of the DBPs is studied using these bio-filters. A bench-scale experimental setup is used to study the effects of variation in depth and types of filtering medium, the concentration of DBPs, characteristics of the biofilm and its thickness; and retention time of the filter.

Sanjay Tewari, PhD

Assistant Professor
Louisiana Tech University

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394789 - Removal of Removal of Disinfection By-Products from Water Using a Hybrid Bio-filter Made of Sand and Low-cost Activated Carbon Derived from Coconut Shells



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