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Challenges with SMUD’s CommunityRenewable Energy Project DeploymentElaine Sison-LebrillaWebinarAugust 21, 2012Powering forward. Together.
Overview SMUDPolicy DriversRenewable MixProject DescriptionChallenges &StatusLessons Learned2
Sacramento Municipal Utility District Publicly Owned Utility, elected Board of DirectorsSacramento County (and Placer County), almost600,000 customers, 1.4 million populationAggressive 23.9% Renewable supply by 2010;37% by 2020GHG Reductions by 2050 (10% of 1990 levels, 350,000 metric tonnes/year)California Solar Initiative-125 MWFeed-In Tariff (100MW in Contracts)3
Renewable Goals AggressiveProgramrenewable energy goals20102011Production .9%4.4%Total24.9%25.4%37.4%44
Community Renewable EnergyDeploymentGrants: 5,050,000(DOE) & 500,000 (CEC) Solar Highways Co-Digestion of Fat, Oil, Grease Waste andliquid food wastes at County WastewaterTreatment Plant Anaerobic Digester at New Hope Dairy Anaerobic Digester at Warmerdam Dariy Anaerobic Digester at SacramentoRecycling and Transfer Station (BLTEnterprises)
SMUD CRED Locations
BackgroundTransmission Constraints Focus on local renewable resources SolarBiomass/BiogasLocal benefits to customer-owners Power Purchase Agreements (Feed-In Tarifflike Terms)
Sacramento Solar HighwaysObjectives Objectives: Promoting public awareness and support of solar technologyand local renewable energy Creating a highly-visible demonstration of the region’scommitment to sustainability and the development of “green”technology Assisting SMUD in meeting carbon reduction and renewableenergy goals Establishing a blueprint for utility-scale solar powerinstallations on CalTrans public rights-of-way in California. ProjectPartners:
Sacramento Solar HighwaysOverview Plan,design and construct two gridconnected solar photovoltaic systems “onthe freeway” (in the Caltrans right-of-way) Planned system capacity is 1.4 MWCould power 250 homes Avoids 800 metric tons of greenhouse gas emissionsper year Collectdata on system performance andestablish a “blueprint” for future highwaysolar installations in California
Sacramento Solar HighwaysChallengesRFP released for Developers last year.Received only one bid, high cost to build Cancelled the solar highways project Changed to Simply Solar. ReleasedStatement of Interests (SOI). Received 11proposals, awarded to Conergy
SRCSD Co-Digestion of FOG & LiquidWastes Desired Outcome: Implement full scale co-digestionof fats, oil and grease (FOG) andliquid food processing waste withsewage at the SacramentoRegional Wastewater Treatmentfacility (estimated power recoveryof 1 - 3 MW). Partners: Sacramento Regional CountySanitation District Contractor- TBDFOG
SRCSD/SMUD Partnership The Sacramento Municipal Utilities District (SMUD)currently generates energy at the Carson EnergyCogeneration Plant located in the SRWTP property Biogas Produced in SRWTPs Digesters is used as fuelfor the gas turbine duct burner at the Carson Plant; inreturn, the Carson Plant provides steam to SRWTP tomeet their heating needs.The biogas enhancement project provides anopportunity to: increase biogas production at SRWTPprovide O & M benefits at SRWTPreduce amount of select waste streams from entering thecollection system
Pilot Study(Dec 2008-Sept 2009) To pump food processing waste and brown greasedirectly into the digester instead of going through thecollection system.To increase gas production in the digesters.Monitor Biosolids characteristics in the digester,monitor any potential operational issues for a full scalesystemObtain data on the economic factors to better assessthe economic feasibility of a full scale projectTest and control digester maintained with the sameprocess parameters, only change was adding grease orfood processing waste to the test digester
Pilot Study - ConclusionsBiogas enhancement is feasible at SRWTP No adverse effects observed in testdigester Energy content remained constant No issues noted with Siloxaneconcentration Biogas production increased rapidly % of TS for FOG varied greatly ( 1 to 23%) Pre-screening material improves O&M Good mixing of material is key
Pilot Study - ResultsStrong Community Support 2009 recipient of a Sacramento SustainableBusiness award, along with other pilotparticipants Many interested processors at the CaliforniaLeague of Food Processors Expo in February2010 Local Waste Haulers would not need to travelto EBMUD in Oakland, CA
Project Status & FinancingConstruction: 2012 Started early 2012 Expected completion by December2012Financing 1.5 M grant requirements,functional project by Sept 2013 Balance provided by SRCSD
New Hope Dairy AD Project DesiredOutcome: Implementabove grounddigester and 450 kW enginegenset for combined heat andpower (CHP) application at NewHope Dairy Farm in Galt,California which has over 1200dairy cows. Partners:ABEC New Hope LLC
FreeStallsWaterBedsFlush Lane with rubber mat
Project Status & Financing Constructionto be started shortly Financing – not fully secured yet FundingAgreement for Grant signed Treasury 1603 (filed) Carbon Offset MOU Natural Resources Conservation Servicegrant (equipment) PPA and IA Agreements signed Loan with New Resource Bank inunderwriting process20
Warmerdam Dairy AD Project DesiredOutcome: Implementa covered lagoon digesterand genset that will generate anelectrical output of 600 kW for CHPapplication which has about 1200 dairycows at Warmerdam Dairy farm in ElkGrove, California. Partners: Van Warmerdam Dairy Farm,Maas Energy Works
Project Description Covered ManureLagoon anaerobic digester H 2S& water removal from biogas 600kW CHP GenSet Electricityto SMUD grid Soil amendment BACT emissions, recycle water Businessmodel: design, build, own, operateand finance (New Resource Bank)22
Project Challenges, Status &Financing Funding Agreement-Executed with Innate EnergyLLC. Obtained Air PermitDeveloper (Innate) did not secure financing.SMUD & Innate mutually terminated agreement Filed Treasury 1603.Completed Preliminary Design for covered lagoon.Filed permit application.Signed Lease with Dairy OwnerConstruction starts this yearReleased Statement of Interests for other developeron Nov 30, 2011. Awarded to Maas Energy Works Maas Energy Works agreement signed, Dec 2011. 23
Food Wastes AD ProjectDesired Outcome: Installabove ground andcomplete mix digester that willutilize fruits and vegetables wastesand other food processing wastes,generate up to 1.5 MW.Partners: RealEnergy, SacramentoRecycling & Transfer Station (site)
Challenges & Status of FoodWastes AD Project RealEnergy did not secure the sitecontrol Decided to cancel the project Reallocated the grant allocation toother 4 projects
Lessons Learned Financing can be challengingGrant Funding is a two-edged sword Funding Requirements - compliancePermitting takes timeEverything takes longer than you expect.Cancelled project or changed developer ifneeded
Conclusion GHG/RPSgoals/regulation drivingSMUD to more renewables Utilization of local renewableresources providebenefits/challenges SMUD is committed to sustainableand environmentally beneficialenergy solutions for our customerowners27
Thank YouQuestions/Comments?For more information please contact:Elaine Sison-Lebrilla, P.E.Senior Project Manager, Renewable EnergySacramento Municipal Utility DistrictSpecial Thanks to SMUD CRED Team:Valentino Tiangco, Marco Lemes, andKathleen Ave28
U.S. Department of Energy \(DOE\) Office of Energy Efficiency and Renewable Energy \(EERE\) Community Renewable Energy Success Stories Webinar series presentation by Elaine Sison-Lebrilla, Sacramento Municipal Utility District \(SMUD\) on technical challe\ nges confronting local solar energy programs in California. Created Date: 9/4/2012 9:54:58 AM
