Low Head Filtration Removal Efficiencies of Giardia Cysts, Coliform Bacteria, and Turbidity From Low Turbidity Water

by Porter Rivers, Colorado State Univ, Fort Collins, CO, USA,
David W. Hendricks, Colorado State Univ, Fort Collins, CO, USA,
Richard J. Coniglio, Colorado State Univ, Fort Collins, CO, USA,
David K. Evers, Colorado State Univ, Fort Collins, CO, USA,



Document Type: Proceeding Paper

Part of: Environmental Engineering

Abstract:

The removal of Giardia cysts from low turbidity waters is of great concern in many areas of the United States. A pilot program was undertaken to determine if an established low head filtration system would be effective in removing Giardia cysts, total coliform bacteria, and turbidity from low turbidity water. The test results showed that when, proper coagulation was used, the process was effective in removing 68 to 99 percent of turbidity, 78 to 99 percent of total coliform bacteria, and 99. 8 to 100 percent of Giardia cysts. Raw water turbidities ranged from 0. 33 to 2. 5 NTU. Research was done by Colorado State University under the sponsorship of Environmental Elements Corporation.

Subject Headings: Turbidity | Bacteria | Water treatment | Filtration | Head (fluid mechanics) | Water conservation | Coagulation | United States

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