Engineering, economics, and management of a swine manure digester

Conference · Thu Jan 01 04:00:00 EST 1981 · ASAE Publ.; (United States)

OSTI ID:6517579

Fischer, J R; Iannotti, E L; Fulhage, C D

The microbiology and biochemistry of converting swine manure to methane is discussed. Recommended design parameters for a swine manure digester are: loading rate, 4 g VS l /sup -1/day-/sup 1/; temperature of digesting slurry, 30 to 35/sup 0/C; and detention time, 15 days. The recommended procedure for starting a digester is loading at 2.5 g VS l/sup -1/day/sup -1/ and increasing the loading rate by 0.8 g VS l/sup -1/day/sup -1/ at weekly intervals. A model pork production system was developed in which an anaerobic digester supplies 93% of the thermal energy needs and 100% of the electrical energy requirements of the buildings. An economic analysis of this system indicated that a $21,000 investment in the digester could be amortized in 12 years with a 10% return on investment if electricity costs $0.04/kWh and propane costs $0.15/l.

• Research Organization: Univ. of Missouri, Columbia
• OSTI ID: 6517579
• Report Number(s): CONF-8009144-(Vol.2)
• Conference Information: Journal Name: ASAE Publ.; (United States) Journal Volume: 4-81
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090122 -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
AGRICULTURAL WASTES
ANAEROBIC DIGESTION
ANIMALS
BIOCONVERSION
DIGESTION
DOMESTIC ANIMALS
ECONOMICS
EQUIPMENT
FARMS
MAMMALS
MANAGEMENT
MANURES
OPERATION
ORGANIC WASTES
PROCESSING
SWINE
VERTEBRATES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES