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©AGreen Energy, LLC, 2010. All rights reserved.

Individual Farm Model – 300 to 500 cows

1. Manure Input:~4,000 gallons per day

1. Organic Input:~6,000 gallons per day

2. Digestion Tank Loading Rate:~10,000 gallons per day, 30 day retention

3. Gas Capture:~100,000 cubic feet per day, 60% methane. 73 MMBTU/day

5. Heat Exchanged

4. Electricity Generated:~4,000 kWh/day

3. Solids Produced:~15 tons per day, 18 cubic yards

3. Liquids Produced:~6,000 gallons per day

©AGreen Energy, LLC, 2010. All rights reserved.

Hof Oegens – 185kW, model facility

Important Characteristics

-Small herd (120 cows from two herds)-Large amount of non-manure substrate

-Use of waste heat for ag purposes-Commercial site

©AGreen Energy, LLC, 2010. All rights reserved.

Hof Oegen - CHP

185kW – containerized, quiet, process controls

Sends hot water to greenhouses as well as electricity to grid Sensor Reports

Containerized CHP

Output Meter

©AGreen Energy, LLC, 2010. All rights reserved.

Hof Oegen – Waste Heat Utilization

1,000m3 currently, heat production can support up to 4,000m3

Looking to upgrade to a more efficient heat exchanger

Digester House/Barns Greenhouses

Waste Heat Use 25% 35% 40% (10% now)

Heat Exchanger

Soil Sterilizer

©AGreen Energy, LLC, 2010. All rights reserved.

Anaerobic Digestion – GHG Reduction and Energy

Combustion of Methane:

CH4 + 2O2 CO2 + 2H2O

Transforms methane (Global Warming Potential of 21-25) to carbon dioxide (GWP of 1)

Replaces fossil fuel use for electricity generation and local heating

300kW GenSet 92.5% UptimeX = 2,430,900kWh per year

2,430,900kWh per year / 7,620 kWh per household =

319

Renewable Massachusetts Households per AD

©AGreen Energy, LLC, 2010. All rights reserved.

Impact of Nutrient Regulations/AD Effluent Spreading

0

50

100

150

200

250

300

350

400

450

1940 1950 1960 1970 1980 1990 2000 2010

1,00

0 to

nn

es o

f N

per

yea

r

Fertilizer Manure

Source:

Tafdrup, Søren. ”Agricultural biogas in the future Danish energy supply” 2008.

©AGreen Energy, LLC, 2010. All rights reserved.

How Much?

Project Funding – One Farm

Grants 1,050,000

Other Equity 800,000

Loan 900,000

Total: $2,750,000

Loan Guarantees 1,800,000

Project Spending – One Farm

Equipment 2,200,000

Fees 550,000

Total: $2,750,000

Going from One to Five Farms:

Project Challenge

First Farm:

All Set, Operational in 2010

©AGreen Energy, LLC, 2010. All rights reserved.

Challenge - Electricity Pricing

DenmarkCost

($/kWh)

Subscription Payment $.029

Electricity Tax $.094

Distribution Payment $.007

Payment to Conservation Fund

$.001

CO2 Tax $.015

VAT $.068

Energy Cost $.126

Total: $.34

Massachusetts/Denmark Compared

Cost ($/kWh)

Massachusetts $.18

Denmark $.34

Difference: +$.16

Source:

Danish Energy Agency, “Energy Statistic 2007”

©AGreen Energy, LLC, 2010. All rights reserved.

Challenges – Juggling Many Parties

Farms Organics Energy Funding

Utilities

Attributes

Workable net metering or feed-in tariff

Sale of excess electricityat close to retail

Short turn around for equity

Not bundled with energy

Cash Market

Scrape facilities

Use, or willing to switch to organic bedding

Truck Access (25 ton loads)

3 phase power service

Existing heat demand andwaste heat user

350-1,000 cows, or abilityto aggregate

Existing waste hauler

Allowances and incentivesfor organic waste diversion

Market size and currentCost of disposal

Fields with slight or no slope

Desire to control odor orenvironmental challenge

Proximity

Grant Programs

Equipment/ Construction

Equity and Loans

Interconnection requirement

Bonds

Equity Sources

Long term utility contract

Co-products

Organic fertilizer market

Soil amendment market

©AGreen Energy, LLC, 2010. All rights reserved.

©AGreen Energy, LLC, 2010. All rights reserved.