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dc.contributor.author De Carlo, EH en_US
dc.date.accessioned 2012-01-27T20:24:19Z en_US
dc.date.available 2012-01-27T20:24:19Z en_US
dc.date.issued 1987-01-01 en_US
dc.identifier.citation De Carlo EH. 1987. Chemical Behaviour of Geothermal Silica after Precipitation from Geothermal Fluids with Inorganic Flocculating Agents at the Hawaii Geothermal Project Well-A (HGP-A). Honolulu (HI): University of Hawaii at Manoa. en_US
dc.identifier.uri http://hdl.handle.net/10125/21828 en_US
dc.description Report Number: DOE/SF/15799-T11; OSTI ID: 6784371; Legacy ID: DE87003991 en_US
dc.description.abstract The report summarizes the results of experiments dealing with the problem of removal of waste-silica from spent fluids at the experimental power generating facility in the Puna District of the island of Hawaii. Geothermal discharges from HGP-A represent a mixture of meteoric and seawaters which has reacted at depth with basalts from the Kilauea East Rift Zone under high pressure and temperature. After separation of the steam phase of the geothermal fluid from the liquid phase and a final flashing stage to 100 degrees Celsius and atmospheric pressure, the concentration of the silica increases to approximately 1100 mg/L. This concentration represents five to six times the solubility of amorphous silica in this temperature range. We have evaluated and successfully developed bench scale techniques utilizing adsorptive bubble flotation for the removal of colloidal silica from the spent brine discharge in the temperature range of 60 to 90 degrees C. The methods employed resulted in recovery of up to 90% of the silica present above its amorphous solubility in the experimental temperature range studied. en_US
dc.description.sponsorship DOE Contract Number FG03-85SF15799 en_US
dc.format.extent 82 pages en_US
dc.language.iso en-US en_US
dc.publisher University of Hawaii at Manoa en_US
dc.subject scaling en_US
dc.subject process chemistry en_US
dc.subject silica en_US
dc.subject chemistry en_US
dc.subject Puna en_US
dc.subject HGP-A en_US
dc.subject Kilauea en_US
dc.subject East Rift Zone en_US
dc.title Chemical behaviour of geothermal silica after precipitation from geothermal fluids with inorganic flocculating agents at the Hawaii Geothermal Project Well-A (HGP-A) en_US
dc.type Report en_US
dc.type.dcmi Text en_US

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