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A platform for research: civil engineering, architecture and urbanism
Foam Separation Method for the Clarification of Natural Waters
The objective of this study was to test the foam separation process on natural waters from various sources. Several samples of natural water were clarified by foam separation with surfactants, including those to which sediment had been added to increase the raw water turbidity. The dosage ranged from 10 to 60 mg/l, according to the turbidity of the raw water. When the surfactant was fed in several doses, the clarifying effect of any one dose was found to be uninfluenced by previous doses. Three quaternary ammonium salts gave similar results. Of the three, EHDA‐Br. required the lowest dosage. The use of bentonite clay as a flotation aid permitted some reduction in surfactant dosages. For a 2‐liter raw‐water volume, clarification can be achieved in about 45 minutes with a collapsed foam production of 5‐20 ml and surfactant concentrations in the residual waters of 1‐2 mg/l. The process appears quite promising for clarifying highly turbid waters and should be tested with natural waters on a continuous flow basis.
Foam Separation Method for the Clarification of Natural Waters
The objective of this study was to test the foam separation process on natural waters from various sources. Several samples of natural water were clarified by foam separation with surfactants, including those to which sediment had been added to increase the raw water turbidity. The dosage ranged from 10 to 60 mg/l, according to the turbidity of the raw water. When the surfactant was fed in several doses, the clarifying effect of any one dose was found to be uninfluenced by previous doses. Three quaternary ammonium salts gave similar results. Of the three, EHDA‐Br. required the lowest dosage. The use of bentonite clay as a flotation aid permitted some reduction in surfactant dosages. For a 2‐liter raw‐water volume, clarification can be achieved in about 45 minutes with a collapsed foam production of 5‐20 ml and surfactant concentrations in the residual waters of 1‐2 mg/l. The process appears quite promising for clarifying highly turbid waters and should be tested with natural waters on a continuous flow basis.
Foam Separation Method for the Clarification of Natural Waters
Grieves, Robert B. (author)
Journal ‐ American Water Works Association ; 59 ; 859-866
1967-07-01
8 pages
Article (Journal)
Electronic Resource
English
Surfactants , Clays , Turbidity , Flotation , Clarification , Flow , Dosage , Separation Techniques
FOAM SEPARATION CLARIFICATION OF NATURAL WATERS
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