Rural biogas technology: effect of digester pressure on gas rate and composition
The effect of digester pressure on gas rate and composition was studied using an experimental Chinese-type digester of 5 m/sup 3/ volume. Water buffalo dung was used as feedstock and was fermented at 40 days retention time. The increase in digester pressure was accompanied by a decrease in the amount of biogas produced. However, this decrease was partially compensated for by the increase in methane content. The latter may be attributed to the transfer of carbon dioxide from the gas phase to the liquid phase. The remainder of the noted decrease in the obtained gas amount was related to the increase of the nonconfined amount of slurry in the outlet chamber. Thus, it can be concluded that the initial amount of gas liberated was not a direct consequence of varying the digester pressure. A modified design for the outlet chamber is proposed. Such modification is anticipated to decrease the gas losses, partially stabilize the gas pressure and accordingly increase the efficiency of the digester operation as well as the gas combustion process.
- Research Organization:
- National Research Centre, Dokki, Cairo, Egypt
- OSTI ID:
- 5568364
- Journal Information:
- J. Eng. Appl. Sci.; (United States), Vol. 2:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BIOREACTORS
EFFICIENCY
PRESSURE DEPENDENCE
BIOGAS PROCESS
CARBON DIOXIDE
COMBUSTION
DESIGN
MANURES
METHANE
RURAL ENERGY CENTERS
SLURRIES
AGRICULTURAL WASTES
ALKANES
ANAEROBIC DIGESTION
BIOCONVERSION
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DIGESTION
DISPERSIONS
HYDROCARBONS
MANAGEMENT
MIXTURES
ORGANIC COMPOUNDS
ORGANIC WASTES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PROCESSING
SUSPENSIONS
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
090122 - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)