Management of swine manure for the recovery of protein and biogas. Final report

Technical Report · Mon May 01 04:00:00 EDT 1978

OSTI ID:6292029

Boersma, L; Gasper, E; Miner, J; Oldfield, J; Phinney, H

Major findings of an investigation into the concept of nutrient and energy recovery from a swine waste management system are reported. Algae and bacteria were used to convert swine manure into methane-rich fuel gas and supplemental protein for animal feed. Waste heat from electricity generating plants was simulated to test its value in enhancing the biological recovery of nutrients and energy. The experimental facility was built adjacent to the Swine Research Center at Oregon State University and consisted of animal quarters with solid concrete floor and gutter to house 50 pigs, an anaerobic digester with a volume of 14 cu m, and 12 outdoor algae basins with a combined surface area of 24 sq m and a combined volume of 6,000 l. Manure was removed from the animal quarters by a gutter flushing system. The solids were separated from the liquids by gravity settling and then pumped into the digester for solubilization and recovery of biogas. The liquid phase of the diluted manure was pumped into the outdoor basins to serve as nutrient substrate for the growth of the high temperature strain 211/8K of Chlorella vulgaris as the predominant algal species. The algal biomass was concentrated by centrifugation and freeze dried. Its nutritional value as a protein source was determined by feeding trials with Long-Evans rats.

• Research Organization: Oregon Agricultural Experiment Station, Corvallis (USA)
• OSTI ID: 6292029
• Report Number(s): PB-286722
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090122* -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
AGRICULTURAL WASTES
ALGAE
ANIMAL FEEDS
ANIMALS
BIOCONVERSION
BIOSYNTHESIS
DOMESTIC ANIMALS
ENERGY SOURCES
FLUIDS
FOOD
FUEL GAS
FUELS
GAS FUELS
GASES
HIGH BTU GAS
MAMMALS
MANAGEMENT
MANURES
ORGANIC COMPOUNDS
PLANTS
PROTEINS
SOLID WASTES
SWINE
SYNTHESIS
SYNTHETIC FUELS
VERTEBRATES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES