Wastewater effluent for power plant cooling. Final report to Texas Electric Service
The objective was to determine if integration of wastewater treatment with power-plant cooling was technically and economically feasible. Moreover, it was necessary to point out the mutual beneficial aspects of the two functions and to delineate what further research was required. The investigation was limited to 400 and 1000 MW powerplants located in the north-central Texas region. Because of the long retention time, present BOD/sub 5/ effluent standards could be obtained from the proposed ponds using raw wastewater. The heat added by the condenser system in winter would be beneficial to the biological purification processes. To avoid probable summer time odor and nuisance conditions associated with high areal organic loading, maximum flows would be limited to 20 and 50 MGD raw wastewater, respectively, following plain sedimentation. Grease and other flotables in raw wastewater would need to be removed by pretreatment processes. The growth of microorganisms in the pond would cause effluent suspended solids to be higher than present standards allow, and post-treatment would be required. Also, the coliform dieoff rate in the pond probably would not be sufficient to meet effluent standards. Salt buildup in the pond due to evaporation would limit the minimum wastewater flows at 10 and 40 MGD to 560 and 1400 acre ponds, respectively, for the assumptions made in this study. Pretreatment processes for nutrient removal might be required to prevent condenser system difficulties or to improve aesthetic qualities of the pond even though eutrophic conditions could not be alleviated. To meet probable future effluent standards, further carbon, nitrogen and phosphorus removal would be required. The costs of the potential systems are delineated and compared to present municipal systems as regards present and probable future effluent requirements. A significant economic advantage is apparent for the integrated system.
- Research Organization:
- Texas Univ., Austin (USA). Center for Research in Water Resources
- OSTI ID:
- 7108636
- Report Number(s):
- CRWR-95; EHE-72-19
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FOSSIL-FUEL POWER PLANTS
COOLING SYSTEMS
WASTE WATER
USES
WASTE PROCESSING
COOLANTS
ECONOMICS
FEASIBILITY STUDIES
SEWAGE
WASTE HEAT
ENERGY
ENERGY SOURCES
HEAT
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
OXYGEN COMPOUNDS
POWER PLANTS
PROCESSING
THERMAL POWER PLANTS
WASTE MANAGEMENT
WASTES
WATER
200101* - Fossil-Fueled Power Plants- Cooling & Heat Transfer Equipment & Systems