Biothermal gasification of biomass and organic residues
The BIOTHERMGAS process is described for gasification of biomass and organic residues to substitute natural gas (SNG). This process combines biological and thermochemical unit operations for the conversion of a broad variety of organic feeds such as plant materials, organic residues, and peat to SNG or other fuels, regardless of their water and nutrient content. The process employs biological gasification followed by thermochemical gasification of refractory digester residues. Ammonia and other inorganic nutrients are recycled from the thermochemical process unit to the biological gasification unit (digester). Waste heat from thermochemical conversion components is used to supply the heat requirement of the bioconversion component. The product gases from the thermochemical unit can be upgraded to SNG by either biological or catalytic methanation. The results of preliminary systems analyses of three different operating conditions are presented here: 9.1 x 10/sup 6/ kg/day Bermuda grass plant with catalytic methanation, 9.1 x 10/sup 6/ kg/day Bermuda grass plant with biomethanation, and 0.9 x 10/sup 6/ kg/day municipal solid waste (MSW) and sewage sludge plant with biomethanation. The results of these analyses indicate that the performance of this process is superior to biological or thermochemical processes used separately. Laboratory studies conducted on conversion of typical thermochemical product gases (H/sub 2/, CO/sub 2/, and CO) to methane in a sewage sludge digester showed that effective conversion of gases can be accomplished by biomethanation without any adverse effect on the sludge bioconversion process.
- OSTI ID:
- 6549671
- Report Number(s):
- CONF-801104-14
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hybrid biothermal conversion of biomass to methane
Biothermal conversion of biomass and wastes to methane
Related Subjects
090122 -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
ALKANES
AMMONIA
ANAEROBIC DIGESTION
BIOCONVERSION
BIOGAS PROCESS
BIOMASS
BIOMASS CONVERSION PLANTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
DATA
DIGESTION
ELEMENTS
ENERGY SOURCES
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
GRASS
HIGH BTU GAS
HYDRIDES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
INFORMATION
MANAGEMENT
METHANATION
METHANE
MUNICIPAL WASTES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NUTRIENTS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANTS
PROCESSING
RENEWABLE ENERGY SOURCES
SEWAGE
SEWAGE SLUDGE
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
YIELDS