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

Technical Report · Mon May 01 00:00:00 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
ANIMAL FEEDS
BIOSYNTHESIS
HIGH BTU GAS
MANURES
BIOCONVERSION
ALGAE
MANAGEMENT
PROTEINS
SWINE
SYNTHETIC FUELS
WASTE HEAT UTILIZATION
AGRICULTURAL WASTES
ANIMALS
DOMESTIC ANIMALS
ENERGY SOURCES
FLUIDS
FOOD
FUEL GAS
FUELS
GAS FUELS
GASES
MAMMALS
ORGANIC COMPOUNDS
PLANTS
SOLID WASTES
SYNTHESIS
VERTEBRATES
WASTE PRODUCT UTILIZATION
WASTES
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)