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HomeMy WebLinkAboutAnaerobic Digestion Feasibility Study Initial Presentation (PDF)Anaerobic Digestion Feasibility Study Surfside Wastewater Treatment Facility Public Meeting February 4, 2020 Nantucket High School Cafeteria Agenda •Introduce CEC Organics-to-Energy Project Team •MassCEC Assistance •Goals •Anaerobic Digestion Technology •Anaerobic Digestion in Nantucket •Schedule & Moving Forward CEC Project Team •David Gray, Sewer Director, Nantucket •Roberto Santamaria, Health Director, Nantucket •Lauren Sinatra, Energy Coordinator, Nantucket •Kent Nichols, Weston& Sampson •Dan Sheahan, Weston & Sampson •Gina Cortese, Weston & Sampson •Representative from numerous Town Departments MassCEC Assistance •State economic development agency •Mission: grow the state’s clean energy economy while helping to meet the MA’s clean energy, climate and economic development goals •2019 Organics-to-Energy grant for Feasibility Study: $60,000 •Public Outreach Support Project Goals •Determine Feasibility of AD Based on: –Evaluation of Project Site, Vicinity, and Community Impacts –Environmental and Permitting Consideration –Feedstock Analysis –Treatment Capacity/ Headworks Analysis –System Output Analysis –Financial Evaluation •Anaerobic Digester Conceptual Design Anaerobic Digestion Technology •A collection of natural biologic processes. •Microorganisms break down biodegradable material in the absence of oxygen. •Process used in many industrial and domestic purposes to manage waste and/or to produce fuels. •Digestate is produced by anaerobic digestion. Anaerobic Digestion Technology Sludge and other organic feedstocks Biogas Digestate Hot Water Mixer Anaerobic Digestion Technology Boston, MA Anaerobic Digestion Technology Nashua, NH Anaerobic Digestion Technology Rockland, MA Anaerobic Digestion Technology Exeter, ME Anaerobic Digestion Technology Burlington, VT Anaerobic Digestion Technology Montpelier, VT Anaerobic Digestion Technology Feedstocks (Input) •WWTF Residuals (Sludge/Bio-solids) •Fats, Oils, and Grease •Source Separated Organics •Brewery Waste •Other Wastes –Septage and Landfill Leachate Anaerobic Digestion Technology Feedstocks (Input) •WWTF Residuals (Sludge/Bio-solids) Anaerobic Digestion Technology Feedstocks (Input) •Fats, Oils, and Grease Anaerobic Digestion Technology Feedstocks (Input) •Source Separated Organics Anaerobic Digestion Technology Feedstocks (Input) •Brewery Waste Anaerobic Digestion Technology Feedstocks (Input) •Other Wastes –Septage and Landfill Leachate Anaerobic Digestion Technology Energy Production (Output) Electricity Heat Anaerobic Digestion Technology Class A Biosolids (Output) Enclosed areas for roll off containers Anaerobic Digestion in Nantucket Surfside WWTF Siasconset WWTF DPW & Landfill Anaerobic Digestion in Nantucket Surfside WWTF Discharge Beds Process Area Anaerobic Digestion in Nantucket Surfside WWTF Process Area Sludge Processing Administration Offices Process AnalysisEquipment Storage Primary Treatment Advanced Treatment Anaerobic Digestion in Nantucket •Possible Inputs –Surfside WWTF Sludge –Siasconset WWTF Sludge –FOG from restaurants, schools, other private kitchens, collection system –Source Separated Organics from restaurants, schools, hospital, Stop and Shop, other grocery markets, private kitchens –Cisco Brewery Waste –Other Wastes Anaerobic Digestion in Nantucket •Anticipated Benefits –Generate clean, renewable energy –Heating/electricity cost savings at WWTF –Reduce volume of solids sent to composting/ landfill –Improve quality of solids sent to composting/ landfill –Possible strength reduction of wastes to WWTF Anaerobic Digestion in Nantucket •Common Concerns –Increased Traffic –Odor Generation –Visual Impacts Schedule •Initial Public Meeting: February 4, 2020 •Second Public Meeting: Early Summer 2020 •Draft Feasibility Study: July 30, 2020 •Final Feasibility Study: October 30, 2020 Moving Forward •Data Collection & Future Needs Analysis •Conceptual Design & Model •Environmental Analysis and Permitting Review •Economic Analysis •Public Comment •Report thank you https://www.nantucket-ma.gov/1616/Anaerobic-Digester-Feasibility-Study