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Innovations in Water Clarification
Water filtration research and development was conducted by General Electric Company, Richland, Washington, at a small experimental filter plant at Hanford, Washington. The experimental work described here was done with Columbia River water. Other kinds of water may give different results. The purpose of the study was to support the operation of large‐scale plants that are required to produce very clear water at high filtration rates and low operating costs. A 5‐gpm experimental filter plant was operated for approximately 4 years. The principal achievements from the use of the plant are improved water filters, improved chemical treatment methods, and a demonstration of practical filtration with a flocculation time as short as 10 minutes, a settling time as short as 60 minutes, and a filtration rate as high as 10 gpm/sq ft. An improved chemical treatment method was developed that uses 5‐50 ppb of organic polyelectrolytes to control filter breakthrough. This treatment, used in conjunction with filters made of both O.4‐mm sand and 0.9‐ 1.5‐mm anthracite, makes it possible to filter water at very high rates without excessive head loss. The resulting filtered water is exceptionally clear, with less than 0.01 ppm turbidity. Results obtained in the experimental filter plant have been confirmed in large‐scale filtration plants.
Innovations in Water Clarification
Water filtration research and development was conducted by General Electric Company, Richland, Washington, at a small experimental filter plant at Hanford, Washington. The experimental work described here was done with Columbia River water. Other kinds of water may give different results. The purpose of the study was to support the operation of large‐scale plants that are required to produce very clear water at high filtration rates and low operating costs. A 5‐gpm experimental filter plant was operated for approximately 4 years. The principal achievements from the use of the plant are improved water filters, improved chemical treatment methods, and a demonstration of practical filtration with a flocculation time as short as 10 minutes, a settling time as short as 60 minutes, and a filtration rate as high as 10 gpm/sq ft. An improved chemical treatment method was developed that uses 5‐50 ppb of organic polyelectrolytes to control filter breakthrough. This treatment, used in conjunction with filters made of both O.4‐mm sand and 0.9‐ 1.5‐mm anthracite, makes it possible to filter water at very high rates without excessive head loss. The resulting filtered water is exceptionally clear, with less than 0.01 ppm turbidity. Results obtained in the experimental filter plant have been confirmed in large‐scale filtration plants.
Innovations in Water Clarification
Conley, Walter R. (author) / Pitman, Raymond W. (author)
Journal ‐ American Water Works Association ; 52 ; 1319-1325
1960-10-01
7 pages
Article (Journal)
Electronic Resource
English
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