Dynamic response of an anaerobic digester with dairy cow manure substrate

Thesis/Dissertation · Sat Jan 01 00:00:00 EST 1972

OSTI ID:5042977

Halderson, J L

Laboratory digesters were daily loaded with increasing amounts of manure (1.6 rising to 8.0 g VS/1/day) while the detention time remained at 15 days, temperature at 35/sup 0/C, and the digester contents continuously mixed. The digesters were acclimated for seven weeks prior to the loading rate increases, and 15 days were allowed between increases. Among Halderson's conclusions were: (1) A maximum loading had not been achieved even at 8.0 g VS/1/day, where digester design and foaming determined the limit; (2) Constant loading rates for 15 days and one detention time does not appear to allow complete microbial stabilization time after a step change in loading rates; (3) A step change in loading rate of 100% did not cause instability in the biodegradation system for loading rates of approximately 1.6 to 8.0 g VS/1/day; (4) All of the measured parameters responded in a similar manner to that of a municipal sewage sludge digester. It appears that time allocated to characterization of farm animal manures would yield a greater amount of usable information than would an equal amount of time on anaerobic digestion studies.

• Research Organization: Purdue Univ., Lafayette, Ind. (USA)
• OSTI ID: 5042977
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
CHEMICAL REACTORS
PERFORMANCE
MANURES
ANAEROBIC DIGESTION
METHANE
BIOSYNTHESIS
COWS
MESOPHILIC CONDITIONS
ORGANIC ACIDS
AGRICULTURAL WASTES
ALKANES
ANIMALS
BIOCONVERSION
CATTLE
CRYOGENIC FLUIDS
DIGESTION
DOMESTIC ANIMALS
FLUIDS
HYDROCARBONS
MAMMALS
MANAGEMENT
ORGANIC COMPOUNDS
PROCESSING
RUMINANTS
SOLID WASTES
SYNTHESIS
VERTEBRATES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)