Biogas energy for Hawaiian small farms and homesteads, HI-11. Final report

Technical Report · Fri Feb 01 00:00:00 EST 1980

OSTI ID:5751034

Weitzenhoff, M H

This report contains the results of a US Department of Energy, Appropriate Energy Technology grant for the development and demonstration of a simple, easy-to-operate and high energy yielding anaerobic bioconversion system for Hawaiian small scale hog farms. The system included a flexible material ''rubber'' digester, gas storage tank, algae pond, wastewater recycling loop, and gas utilization appliances. Ten cubic feet of biogas per 150 pound hog per day was identified as the sustainable yield of biogas using this system under Hawaiian farm conditions at a 15-day retention period without heating or mixing the anaerobic digester. Cost of the system was compared with the economic value of the gas produced and the investment recovery period was found to be 1.16 years. Biogas was used to fuel numerous farm appliances, including nursery infra-red heaters, gas lamps and an internal combustion powered water pump. Digested pig manure was renovated by recycling through an algae pond, after which it was used in biweekly hog housing sanitation washdowns. Finally, the results of the project have been promulgated through informal seminars, workshops, and the publication-distribution of a farmer oriented manual on digester installation and operation. 6 refs., 14 figs., 1 tab.

• Research Organization: Weitzenhoff (Michael H.), Honolulu, HI (USA)
• DOE Contract Number: FG03-78SF01985
• OSTI ID: 5751034
• Report Number(s): DOE/SF/01985-T1; ON: DE85012218
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
FARMS
BIOMASS CONVERSION PLANTS
HAWAII
MANURES
ANAEROBIC DIGESTION
METHANE
BIOSYNTHESIS
OPERATION
SWINE
AGRICULTURAL WASTES
ALKANES
ANIMALS
BIOCONVERSION
DIGESTION
DOMESTIC ANIMALS
FEDERAL REGION IX
HYDROCARBONS
MAMMALS
MANAGEMENT
NORTH AMERICA
ORGANIC COMPOUNDS
ORGANIC WASTES
PROCESSING
SYNTHESIS
USA
VERTEBRATES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
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