Cogeneration of methane and microbial protein from the anaerobic treatment of rendering waste

Thesis/Dissertation · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5582916

West, G T

The purpose of this study was to characterize the by-products formed during the anaerobic treatment of animal rendering waste, and to evaluate the possibilities of energy recovery and feed supplement production. Three lab-scale upflow anaerobic sludge blanket (UASB) reactors were utilized to anaerobically treat two combinations of rendering wastewater. Raw blood/cooker condensate was digester feed for the first phase of experiments. Wash-up water/condensate was tested as feed for the second phase of the study. Both mixtures were characterized as concentrated influents with low chemical oxygen demand (COD) to total nitrogen ratios. The phase 1 experiments utilized COD loading rates ranging from 0.17 to 1.68 g/L-d. The phase 2 trials encompassed COD loading rates varying from 0.34 to 1.01 g/L-d at a feed strength of 5300 mg COD/L. The COD removal efficiencies for the COD loading rates utilized in phase 1 varied from 28 to 74%, while the removal percentages for the four phase 2 trials ranged from 72 to 86%. The biogas produced from all trials contained over 75% methane and traces of hydrogen sulfide. The methane production for phase 1 trials ranged from 0.16 to 0.23 L/gCOD{sub conv}, while the phase 2 trials averaged 0.31 L/gCOD{sub conv}.

• Research Organization: Ohio State Univ., Columbus, OH (USA)
• OSTI ID: 5582916
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
ANIMAL FEEDS
MATERIALS RECOVERY
METHANE
YIELDS
MICROORGANISMS
GROWTH
ANAEROBIC CONDITIONS
BIOLOGICAL WASTES
BIOREACTORS
CHEMICAL OXYGEN DEMAND
DOMESTIC ANIMALS
ALKANES
BIOLOGICAL MATERIALS
FOOD
HYDROCARBONS
MANAGEMENT
MATERIALS
ORGANIC COMPOUNDS
PROCESSING
RECOVERY
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
090122* - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)