State-of-the-art of liquid waste disposal for geothermal energy systems: 1979. Report PNL-2404
The state-of-the-art of geothermal liquid waste disposal is reviewed and surface and subsurface disposal methods are evaluated with respect to technical, economic, legal, and environmental factors. Three disposal techniques are currently in use at numerous geothermal sites around the world: direct discharge into surface waters; deep-well injection; and ponding for evaporation. The review shows that effluents are directly discharged into surface waters at Wairakei, New Zealand; Larderello, Italy; and Ahuachapan, El Salvador. Ponding for evaporation is employed at Cerro Prieto, Mexico. Deep-well injection is being practiced at Larderello; Ahuachapan; Otake and Hatchobaru, Japan; and at The Geysers in California. All sites except Ahuachapan (which is injecting only 30% of total plant flow) have reported difficulties with their systems. Disposal techniques used in related industries are also reviewed. The oil industry's efforts at disposal of large quantities of liquid effluents have been quite successful as long as the effluents have been treated prior to injection. This study has determined that seven liquid disposal methods - four surface and three subsurface - are viable options for use in the geothermal energy industry. However, additional research and development is needed to reduce the uncertainties and to minimize the adverse environmental impacts of disposal. (MHR)
- Research Organization:
- Battelle Pacific Northwest Labs., Richland, WA (USA)
- DOE Contract Number:
- AC06-76EV01831
- OSTI ID:
- 5249580
- Report Number(s):
- DOE/EV-0083
- Country of Publication:
- United States
- Language:
- English
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AGRICULTURE
AHUACHAPAN GEOTHERMAL FIELD
BINARY-FLUID SYSTEMS
CERRO PRIETO GEOTHERMAL FIELD
CHEMICAL REACTIONS
COOLING
CORROSION
ECONOMICS
ENVIRONMENTAL IMPACTS
EVALUATION
FLASHED STEAM SYSTEMS
FLUID INJECTION
FLUIDS
GEOTHERMAL FIELDS
GEOTHERMAL FLUIDS
GEOTHERMAL HEATING
GEOTHERMAL POWER PLANTS
GEOTHERMAL REFRIGERATION
GEOTHERMAL SPACE HEATING
GEOTHERMAL WELLS
GEYSERS GEOTHERMAL FIELD
Geothermal Legacy
HATCHOBARU GEOTHERMAL FIELD
HEATING
INDUSTRY
INSTITUTIONAL FACTORS
LARDERELLO GEOTHERMAL FIELD
LEGAL ASPECTS
LIQUID WASTES
MANAGEMENT
MATERIALS TESTING
OTAKE GEOTHERMAL FIELD
PONDS
POWER PLANTS
REFRIGERATION
REGULATIONS
REINJECTION
SPACE HEATING
STATE GOVERNMENT
SURFACE WATERS
TESTING
THERMAL POWER PLANTS
WAIRAKEI GEOTHERMAL FIELD
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WELLS