Optimization of biological recycling of plant nutrients in livestock waste by utilizing waste heat from cooling water. Final report May 75-Sep 81
The report summarizes a 5-year study of the beneficial uses of waste heat from condenser cooling water from steam-electric generating plants. The major effort addressed the recovery of plant nutrients in swine manure by aquatic farming of selected fish and Chinese waterchestnuts. Another effort included biogas production from swine manure in an anaerobic digester and the use of the digester waste to fertilize the aquatic farming system. Optimum recovery of plant nutrients resulted from operation of an integrated fish and waterchestnut system. Flowing water systems were 30-50% more productive than static systems. Annual fish yields of 5000-7000 lb/acre are projected for a properly stocked system over a 150-180 day growing period. Similarly, waterchestnut yields of nearly 17.8 tons/acre and dry hay yields of 6.7 tons/acre from sand-bed filters would be expected when fed wastewater from the fish system. The quality of the water leaving the sand beds would meet tertiary wastewater treatment standards during the growing season. An estimated 2000-head swine facility with a $400,000 investment would annually produce a 20% rate of return, save 360,000 bbl of oil through waste heat utilization, and produce biogas equivalent to 3000 bbl of oil.
- Research Organization:
- National Fertilizer Development Center, Muscle Shoals, AL (USA)
- OSTI ID:
- 6465800
- Report Number(s):
- PB-83-107763
- Country of Publication:
- United States
- Language:
- English
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Optimization of biological recycling of plant nutrients in livestock waste by utilizing waste heat from cooling water
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Related Subjects
NUTRIENTS
AQUACULTURE
RECYCLING
WASTE HEAT UTILIZATION
AGRICULTURAL WASTES
ALGAE
COOLANTS
ELECTRIC POWER
FERTILIZERS
FISHES
MANURES
METHANE
POWER GENERATION
POWER PLANTS
STEAM
SWINE
WATER
WATER POLLUTION
ALKANES
ANIMALS
AQUATIC ORGANISMS
DOMESTIC ANIMALS
HYDROCARBONS
HYDROGEN COMPOUNDS
MAMMALS
ORGANIC COMPOUNDS
ORGANIC WASTES
OXYGEN COMPOUNDS
PLANTS
POLLUTION
POWER
VERTEBRATES
WASTE PRODUCT UTILIZATION
WASTES
320304* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization