Date post: | 26-Mar-2015 |
Category: |
Documents |
Upload: | ian-mooney |
View: | 216 times |
Download: | 1 times |
Biogas Energy Potentialin Florida
Ann C. WilkieSoil and Water Science Department
University of Florida – IFAS
Renewable Energy Workshop
Florida Public Service CommissionJanuary 19, 2007
Electrical and/or thermal energy
Biofertilizer
Organic wastes Anaerobic
digestion
Biogas
Solar energy
Animal husbandry
Crop harvesting
Industrial processing
Human consumption
Photosynthesis
H2OCO2
Biogas Cycle
Energycrops
ANAEROBIC DIGESTION
The microbial degradation of organic
compounds, in the absence of oxygen,
to biogas – a mixture of:
• Methane (50 to 70%)
• CO2 (30 to 50%)
• trace amounts of H2, NH3, and H2S.
COMPLEXORGANICMATTER
SIMPLEORGANICS
ACETATEH2 / CO2
METHANE and CARBON DIOXIDE
LOW ODOR EFFLUENT
LIQUEFACTIONPHASE
GASIFICATIONPHASE
ACIDOGENS METHANOGENS
FEEDSTOCKS
• Animal manures
• Industrial wastewaters
• Municipal wastewaters
• Municipal solid wastes
• Energy crops / crop residues
BENEFITS OF ANAEROBIC DIGESTION
• Renewable energy
• BOD/COD reduction
• Odor reduction
• Pathogen reduction
• Nutrient conservation
• Greenhouse gas reduction
BIOGAS – A BIOENERGY VECTOR
• Direct Utilization (Heat / Steam)
• Conversion to Bioelectricity (CHP)
• Natural Gas Pipeline
• Vehicular fuel
• Fuel Cells
• Methanol
• Biodiesel
Biogas as fuel
Water heater at UF-IFAS Dairy powered by manure biogas
Natural Gas Bus - Brisbane
BIOGAS PLANT
CORETECHNOLOGY
FERMENTATION
DISTILLATION
BIOGAS
STILLAGE
ANAEROBICDIGESTION
ETHANOL
Biomass Energy Crop
WATER
SUNLIGHT
EnergyCrops
BiogasPlant
Biofertilizer
CO2
CO2 WATER
Methane
Green Grass to Green Gas
Biomass
or
Waste Source
Energy Production
Natural Gas Equivalent(billion cu ft)
Electricity Equivalent(Megawatts)
Municipal wastewater 1 5.52 63
Dairy manure 1 2.96 34
Poultry manure 1 2.7 31
MSW 1 27.5 314
Energy crops 2 167 1908
Total 205.7 2350
Time to Implement: 1 Immediate (1-5 years), 2 Near term (5-7 years)
Florida Biogas Potential from Selected Sources: Annual Estimates
Biogas is a sustainableenergy solution that is:
• Renewable
• Carbon dioxide neutral
• Locally based
thereby protecting the environment, creating jobs and strengthening local economies.
Biogas power provides …
• Energy independence– Renewable natural gas
• Energy reliability– Based on locally based feedstocks
IMPLEMENTATION ISSUES
• Net metering
• Surplus sales agreement
• Standby charge
• Rate schedule
• Interconnection
Biogas Energy Potentialin Florida
Ann C. WilkieSoil and Water Science Department
University of Florida – IFAS
Renewable Energy Workshop
Florida Public Service CommissionJanuary 19, 2007