2. Micro-Turbine Systems for Energy Production from Agricultural and Food Waste

3. Unison Solutions Overview Turnkey waste-to-energy systems Biogas compression/treatment system design and fabrication (Siloxane, moisture and H2S removal) Gas conditioning system components (suction scrubbers, heat exchangers, filtration, condensate knock-outs, etc.) New line of Air and Gas drying equipment Capstone MicroTurbine ASP and distributor (thru Alliant Energy) STM Power Stirling Engine Generator Distributor Multiple awards for Biogas systems (EPA project of the year 2003)

4. A Sampling of Unison Solutions Biogas Projects Landfills 1. Antioch IL-12 Turbine CHP 2. Sauk Co. WI-16 Turbines 3. Glacier Ridge WI-10 Turbines 4. Wisc. Rapids WI-2000 scfm boiler direct use 5. Madison WI-1 STM Stirling Engine WWTF/Industrial/Farm Digesters 1. Rockford IL-2.25 MW Engine CHP 2. Chippewa Falls WI-2 Turbine CHP 3. Albert Lea MN-4 Turbine CHP 4. Sheboygan WI-10 Turbine CHP 5. Northern Star Co. MN-4 Turbines 6. Top Deck Farms IA-4 Turbines

5. 2000scfm Gas Treatment System

6. Northern Star Foods Minneapolis, MN 4-30kW Capstone Turbine System

7. Key Components of the Installation Mesophilic Anaerobic Digester Gas conditioning equipment (Moisture Removal) Gas compression system-scroll compressors Generation System-4 30kW Capstone turbines No Heat recovery system Electrical System Interconnection Communications/Automation Utility metering

8. Gas Compression/Treatment Skid

9. Scroll Compressors

10. 4-Capstone 30kW Micro-Turbines

11. System Block Diagram Fuel System Gas Turbine Control Board Power Board User Interface Exhaust Electrical Output Air Communications and Control Fuel DPC Generator Turbogenerator Generator Cooling Fins Combustion Chamber Exhaust Outlet Recuperator Air Bearings Compressor Generator Turbine

12. System Block Diagram Digital Power Controller (DPC) Turbogenerator Fuel System User Interface Exhaust Electrical Output Air Communications and Control Fuel Turbogenerator

13. Northern Star Project Overview Approx. 2 years of operation since gas conditioning skid replacement. Biogas compression/treatment system is removing the moisture from the gas and protecting the turbines Parasitic load on system for biogas compression and treatment is 15% Biggest challenge has been the high levels of H2S

14. Top Deck Farms Westgate, Iowa 4-30kW Capstone Turbine System

15. Key Components of the Installation Traditional plug-flow digester-750 head dairy Gas conditioning equipment (Moisture Removal) Gas compression system-flooded screw Generation System-4 30kW Capstone turbines Heat recovery system-Cain heat exchanger Methane/LP fueled boiler Electrical System Interconnection Communications/Automation Utility metering

16. Complete Gas Conditioning System

17. Suction Scrubber

18. Flooded Screw Gas Compressor

19. Glycol Chiller for Moisture Removal

20. Capstone 30 kW Micro-Turbines

21. Exhaust Heat Exchanger

22. Methane/LP Boiler

23. Controls for all System Functions

24. Top Deck Project Overview Approx. 1 year of operation since IC engine/generator removed Biogas compression/treatment system is removing the moisture from the gas and protecting the turbines Parasitic load on system for biogas compression and treatment is 16% Installation cost of $3,000/kW O&M cost is running $0.01/kWh or $9900/year Biggest challenge has been the dual fuel gas train on the boiler

25. Key Issues with Micro-Turbines on Ag or Food Waste Digestion Ag/Food Waste digester fueled micro-turbine systems need gas conditioning for moisture removal. Micro-turbine systems also need gas compression to 80psi. Large quantity of thermal energy is available for heating the digester, domestic hot water and space heating with a proper heat recovery system. Turbine and gas treatment O&M expense is minimal if the system is designed and built properly. Micro-turbines are a viable option for Ag/Food Waste digester fueled combined heat and power systems

26. Unison Solutions Contact Information Jan Scott 563-585-0968 jan.scott@unisonsolutions.com www.unisonsolutions.com