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

2. Agenda Introducing Anaergia and VVWRA Project
VVWRA Omnivore Demonstration
VVWRA CHP Project
September 18

3. Trusted for 20 years on 1,600 projects globally
Anaergia Offices
1,600 Installations
16 Offices
3 Manufacturing 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)
September 18

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
September 18

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
September 18

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 CalRecycle that 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.
September 18

20. Questions and Contact Information
Thank you!
David Schneider Juan Josse
Director of Business Development Chief Engineer
P: (760) x P: (760) x 120
E: E:
September 18