Silica separation from reinjection brines at Monte Amiata geothermal plants, Italy
Journal Article
·
· Geothermics (International Journal of Geothermal Research and its Applications); (United Kingdom)
- Univ. di Pisa (Italy). Dipartimento di Ingegneria Chimica
A process for the separation of silica from geothermal reinjection brines is reported, in which the phases of coagulation, sedimentation and filtration of silica are involved. The effectiveness of lime and calcium chloride as coagulating agents has been investigated and the separating operations have been set out. Attention has been focused on Monte Amiata reinjection geothermal brines, whose scaling effect causes serious problems in the operation and maintenance of reinjection facilities. The study has been conducted using different amounts of added coagulants and at different temperatures, to determine optimal operating conditions. Though calcium chloride was revealed to be effective as a coagulant of the polymeric silica fraction, lime has also proved capable of removing monomeric dissolved silica at high dosages. Investigation on the behavior of coagulated brine has revealed the feasibility of separating the coagulated silica by sedimentation and filtration.
- OSTI ID:
- 7056659
- Journal Information:
- Geothermics (International Journal of Geothermal Research and its Applications); (United Kingdom), Journal Name: Geothermics (International Journal of Geothermal Research and its Applications); (United Kingdom) Vol. 23:3; ISSN GTMCAT; ISSN 0375-6505
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
15 GEOTHERMAL ENERGY
154000* -- Geothermal Energy-- Waste Management-- (1990-)
BRINES
CHALCOGENIDES
DEVELOPED COUNTRIES
EUROPE
GEOTHERMAL POWER PLANTS
INJECTION WELLS
ITALY
MANAGEMENT
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
REINJECTION
REMOVAL
SCALING
SILICON COMPOUNDS
SILICON OXIDES
THERMAL POWER PLANTS
WASTE MANAGEMENT
WELLS
WESTERN EUROPE
154000* -- Geothermal Energy-- Waste Management-- (1990-)
BRINES
CHALCOGENIDES
DEVELOPED COUNTRIES
EUROPE
GEOTHERMAL POWER PLANTS
INJECTION WELLS
ITALY
MANAGEMENT
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
REINJECTION
REMOVAL
SCALING
SILICON COMPOUNDS
SILICON OXIDES
THERMAL POWER PLANTS
WASTE MANAGEMENT
WELLS
WESTERN EUROPE