Digesters - Metropolitan Water Reclamation District of Greater Chicago

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Engine Operation Alternatives• Balance DGDigester gas first routed to heating boilersthen balance to engines.• Max with NGDigester gas first routed to heating boilersthen balance to engines.Supply engines with natural gas whenengine capacity is available(typically in winter)
Steam Turbine Operation AlternativesElectric GeneratorMain Steam from Power Boilers(600-750 psia)TurbineExtraction Steam toPlant Heating(90 psig) Exhaust Steam to Condenser(variable, below atmospheric)• ST – A = Use extraction steam for building and digester heat• ST – B = Use extraction steam for building heat, condenser water heatsdigesters via recirculation line• ST – C = Use extraction steam for building heat, condenser water preheatsinfluent sludge to digesters
Page 1 and 2: Digester Gas Utilization at SWRPWhe
Page 3: Presentation Outline• Background/
Page 9 and 10: Projected Digester PerformanceVSR
Page 12 and 13: Digester Gas Production - Modeling
Page 15 and 16: Energy Consumption at SWRP• Build
Page 24 and 25: Energy Flow Scenarios:Digester Gas?
Page 26 and 27: Energy Flow Modeling Framework26
Page 28 and 29: Model Components - Gas Cleanings H2
Page 30 and 31: Model Components - Plant Energy Dem
Page 32 and 33: Projecting Future Energy Prices•
Page 34 and 35: Energy Flow Model - ScenariosScenar
Page 36 and 37: Energy Flow Model - Results$2,000,0
Page 40 and 41: Updated Model Parameters• New Per
Page 42: Sensitivity Analysis - Electricity
Page 45 and 46: Triple Bottom Line Analysis• Econ
Page 47 and 48: Other Reference InstallationsMetrop
Page 49 and 50: Calls and Field Visits - Steam Turb
Page 51 and 52: Conclusions/Discussion• A Combine
Page 53 and 54: Sizing of Cogeneration SystemsCogen
Page 55 and 56: Triple Bottom Line ScoringScenario

Digesters - Metropolitan Water Reclamation District of Greater Chicago

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