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Dissertation/Thesis Abstract

Sedimentation enhancement by fabric inclined settling screen to decrease disinfection by-production formation potential
by Cao, Liu, M.S., University of Missouri - Columbia, 2014, 166; 10180872
Abstract (Summary)

The objective of this research is to develop a simple and innovative technology that effectively lowers chemical concentrations to meet Environment Protection Agency (EPA) drinking water regulations. This study focuses on fabric inclined settling screen development for application to small community drinking water treatment systems to help them with compliance, particularly with disinfection by-products (DBPs) through enhanced solids contact. The technology developed combines fabric filters with the traditional inclined plate concept. Fabric material performance and serviceability was first checked by exposure to a drinking water treatment environment and then measuring turbidity, total dissolved organic carbon, and UV254. The study suggests a product like Pureflo (a polyester) is the more appropriate material in acidic and neutral conditions and one like Surefil (rayon/polyester blend) is the more appropriate material in basic conditions. The Pureflo product was used in bench scale systems to determine performance of the designed fabric inclined settling screen. Experiments with different coagulants, different angle, and different layers of fabric screens was conducted. A pilot scale system was set up in Vandalia, MO to test the feasibility of the fabric screen of turbidity, TOC, UV254, and TTHM removal. Results indicated that screens made from pureflo with angles from 30° through 70° under acidic condition have positive effects on sedimentation enhancement.

Indexing (document details)
Advisor: Inniss, Enos C.
School: University of Missouri - Columbia
School Location: United States -- Missouri
Source: MAI 56/01M(E), Masters Abstracts International
Subjects: Civil engineering, Environmental engineering
Keywords: DBPs reduction, Fabric inclined screens, Organic precursors, Sedimentation enhancement, Water treatment
Publication Number: 10180872
ISBN: 978-1-369-29538-2
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