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HomeMy WebLinkAbout97.Item 12 Presentation Operations Committee Meeting 07-06-2016.pdf -+arCd st,. . - i � t e.- IN OCSD Energy Policy /� • .•. •. OCSD Energy Picture (Average month: July 2015 - April 2016) Supply Demand • Internal • Bio Gas 22,877,440 kWhr Electrical Gen. 7,430,900 kWhr • Electricity 12,175,900 kWhr • External • Thermal 2,697,000 kWhr • Natural Gas 2,740 kWhr • Process 2,071,000 kWhr • *SCE Electricity 4,745,000 kWhr • HVAC 626,000 kWhr • Diesel Emergency Power Total 27,655,180 kWhr AV * 13,565,000 kWhr of biogas needed for electrical energy independence at 35% efficiency. Energy Demand • MD is very efficient in it's utilization • Premium efficiency motors • Variable frequency pumping systems • Turbo air blowers • Fine bubble diffusers • Lighting Systems • Energy Audits Energy Recovery Bio Gas Creation Bio Gas Primary Treatment Digester 65% Methane (CHO 34% Carbon Dioxide (COZ) - 640 BTU/CuFt 960 F Biosolids 57% Solids Secondary Treatment Destruction z Hot Water Hot Water Return Recirculation/Mixing Pump Energy Recovery Bio Gas to Electricity and Heat of InputEnergy ® . . - . - • Captures: • Siloxane • Hydrogen 36%Conversion Sulfide Condensed Water In case of emergency or 2.8%of Input Central Energy Generation shutdown Proposed Policy Statement • MD strives to be energy independent by minimizing energy utilization and maximizing useful energy recovery from the sewage it receives . • Energy independence supports OCSD's primary mission by providing resilient, reliable operations at the lowest cost and environmental impact. • Once OCSD's energy needs are met, excess renewable energy will be sold to support the electrical grid, natural gas distribution or as transportation fuel . Research/Partnering Focus • OCSD is focused on increasing Bio Gas production to fully utilize Central Generation Capacity to meet electricity and heat demand ( no imported energy, fully utilize 18 MW generation capacity) . • Sell excess energy to private markets : • Electrical Grid • Gas exports • Transportation Fuels ( Bio Diesel, Compressed Gas, Hydrogen) • Maintain our carbon neutral exemption from the Cap and Trade System .