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May 30 th , 2013

Victor Valley Water Reclamation Authority Biogas to Energy Project with Omnivore™ Digester Demonstration. May 30 th , 2013. Agenda. Introducing Anaergia and VVWRA Project VVWRA Omnivore Demonstration VVWRA CHP Project. Trusted for 20 years on 1,600 projects globally. Anaergia Offices.

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May 30 th , 2013

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  1. Victor Valley Water Reclamation AuthorityBiogas to Energy Project with Omnivore™ Digester Demonstration May 30th, 2013

  2. Agenda • Introducing Anaergia and VVWRA Project • VVWRA Omnivore Demonstration • VVWRA CHP Project

  3. Trusted for 20 years on 1,600 projects globally Anaergia Offices 1,600 Installations 16 Offices 3Manufacturing Plants

  4. VVWRA Project Drivers • Currently uses biogas in aeration blowers and flares the balance • Adding electrical load with new UV system • Increasing electrical costs from Utility • Sludge biogas production only sufficient for 800 to 900 kW but baseload demand exceeds 1.4 MW • Issued RFP for biogas utilization and co-digestion to increase biogas production to become energy independent (and possibly net exporter of energy)

  5. VVWRA Omnivore Project

  6. VVWRA Omnivore Project Omnivore Demonstration • Summary: A research project to demonstrate the ability for wastewater treatment plants to be utilized as power generating facilities while disposing of high strength organic waste. • Partnership: Partially funded by the California Energy Commission’s Public Interest Energy Research (PIER) Program. • Goals: The demonstration will be studied for the Energy Commission, and technology transfer • Progress: Construction will begin in June, and trials are expected to begin this September.

  7. Omnivore Principles • Decouple HRT from SRT removing from digester more water than solids • Increase SRT 2 to 3 times for improved VSR >60% on combined sewage sludge  Capacity Increase of 2 to 3 X. • Extend SRT with recuperative thickening • As digester solids content increases, we improve mixing to handle higher viscosity sludge • A well operated digester with long SRT and high bacterial biomass inventory achieves similar VSR compared to complex and energy intensive thermal hydrolysis or other WAS pre-treatment methods

  8. Omnivore Implementation Recuperative Thickening • Feed 4 to 5% TS sludge as conventional, no changes in TWAS, PS digester feed • Conventional digesters operate at 2 to 2.5%TS after VS destruction • Omnivore operates in 6 to 8% range without changing digester feed Hydraulic Mixing System • Viscosity increase from 0.4 to 5 Pa.s for sludge 2.5 to 5%TS • Floating cover replacement with double membrane gas holder for improved gas utilization flexibility Service Box • Allows mixer inpection, maintenance or removal with digester in service

  9. Anaergia Sludge Thickener Heart of Omnivore™ concept is Anaergia’s recuperative thickening system

  10. Hydraulic Mixers Mixer retrievable through service box without having to shut down digester. Able to mix higher viscosity due to increased solids.

  11. Mixer Hydraulic Power Units External Drive for up to 5 mixers

  12. Service Box Mixer access without shutting down digester

  13. Double Membrane Cover Allows 4 hours biogas storage to regulate flow to CHP Service Boxes and Hydraulic Mixing Systems designed to this type of cover

  14. VVWRA Combine Heat & Power Project

  15. VVWRA CHP Project Combined Heat and Power Plant • Summary: Anaergia will provide 1,600 kW of generation capability for use at the Treatment Plant (2 – 800 kW IC engines). The project will utilize all biogas produced on site including the increased flows from the Omnivore project. • Partnership: The Project is partially funded by the Self Generation Incentive Program (SGIP), and will be operated by VVWRA. • Progress: In design and permitting stage. Construction is set to begin late summer, and startup is expected in late winter.

  16. VVWRA CHP Project Details Major Equipment (2) 2G-Cenergy 800kW Engines PillAerator Blower

  17. VVWRA CHP Project Details

  18. VVWRA – Net Benefit and Future Possibilities Regulatory Drivers • SB1122 – project is expandable to generate excess energy which could be exported under SB1122 which requires utilities to procure energy from these types of sources • AB341 – Omnivore demonstration is the first step in creating capacity at a municipal wastewater treatment plant to accept external waste. As California begins to force organics diversion, VVWRA will be in a good position to accept external organic waste to assist member cities in meeting diversion goals. • AB323 – pending legislation by CalRecyclethat will ban commercial organics from the landfill; will require this type of infrastructure to handle this portion of the municipal solid waste stream Cost Savings • Estimated to save VVWRA over $9 million over 20 year PPA.

  19. Summary • VVWRA, the California Energy Commission, and Anaergia will demonstrate, study, and share the impacts of an Omnivore retrofit at VVWRA. • Biogas produced at VVWRA’s Wastewater Treatment Facility will be utilized to produce up to 1,600 kW of electricity to be used at the Plant. • The Omnivore and CHP projects will help VVWRA demonstrate the ability for wastewater treatment plants to be utilized as power generating facilities while disposing of high strength organic waste.

  20. Questions and Contact Information • Thank you! • David Schneider Juan Josse • Director of Business Development Chief Engineer • P: (760) 436-8870 x 130 P: (760) 436-8870 x 120 • E: david.schneider@anaergia.com E: juan.josse@anaergia.com

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