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