Fifteen Years of Anaerobic Digestion Operations Khan C... · Fifteen Years of Anaerobic Digestion...
Transcript of Fifteen Years of Anaerobic Digestion Operations Khan C... · Fifteen Years of Anaerobic Digestion...
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Fifteen Years of Anaerobic Digestion Operations
Source-Separated Organic Waste City of Toronto
Carlyle Khan, City of Toronto Tej Gidda & Haleh Shahriari, GHD
Federation of New York Solid Waste Associations Conference, May 20, 2019
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Build That Tank…and Beyond
Composting Renewable Natural Gas (RNG)
Anaerobic Digestion (AD)
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Organics Collection Green Bin Program
✓ Food waste ✓ Pet waste, cat litter ✓ Diapers, sanitary items ✓ Paper food packaging (soiled) ✓ Tissues, napkins, paper towels ✓ Houseplants, soil
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• 2002 • Maximizes convenience • 188,500 tons of food
waste annually (2018)
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City of Toronto
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Map to follow from CP
Vision: to be an international leader in the operation of an innovative and sustainable solid waste management utility
2.9 population
square miles
240
40 Million visitors annually
million
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Our Approach Disco Road Organics Processing Facility (DROPF) - DBOM
Dufferin Organics Processing Facility (DOPF) - DBOM
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83,000 tons SSO per year
61,000 tons SSO per year
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DROPF - Location • City owned facility • 2-acre site • Former landfill site • Existing transfer station
(garbage, recycling material, yard waste and HHW)
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DROPF - Capacity • 83,000 tons per year
SSO uninterrupted 1,650 tons/week 30 transfer
trailers/week 70 curbside
trucks/week • Began operation in 2014
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DROPF - Facility Overview
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Residue
Pulp
Pre-Processing Tip Floor
Anaerobic Digestion
SSO
Biogas
Effluent
Digester Solids
Kerr, N., Gidda, T. Development of A Large Scale SSO Organics Processing Facility Using Anaerobic Digestion. 03 Nov. 2014
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DROPF - Organics Separation • Wet separation • Grit removal system
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DROPF - Biogas Utilization • 304M ft3 biogas per
year (8.6M m3) • Biogas => heat +
Renewable Natural Gas • Flare
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DROPF - Outputs • Wastewater: meeting Toronto sewer use by-law discharge
requirements without surcharges • WWTP (SBR - DAF) • Digestate (centrifuge dewatering) • Dewatered digestate => Composted at a third party facility
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DROPF - Odor Management • Inorganic 6-cell biofilter • 131 ft tall stack (40 m) • No odor complaints
since start-up • Close proximity to
people
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Dufferin Organics Processing Facility (DOPF)
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61,000 tons SSO per year
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DOPF - Location • City owned facility • Adjacent MRF and
transfer station • 10 years full scale pilot
plant
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DOPF - Capacity • 61,000 tons per year
SSO • Operation: Q2 2019
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DOPF - Organics Separation • Wet/dry separation
through extrusion • Grit and plastics
removal system
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DOPF - Renewable Natural Gas (RNG) Facility • 222M ft3 biogas per year (6.3M m3) • Biogas => RNG • Enbridge - DBFOM
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DOPF - Outputs
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• Wastewater: meeting Toronto sewer use by-law discharge requirements without surcharges
• WWTP (MBR) • Digestate (centrifuge dewatering) • Dewatered digestate => Composted at a
third party facility
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DOPF - Odor Management • Inorganic 4-cell double-
decked biofilter • 131 ft tall stack (40 m) • No odor complaints • Close proximity to
people
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Biogas and RNG across Canada
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Updated January 2019
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Carlyle Khan, City of Toronto Director of Infrastructure Development & Asset Management, Solid Waste Management [email protected] Tej Gidda, GHD Vice President [email protected]
Contact Information
Federation of Solid Waste & Recycling Conference May 19-22, 2019