HomeMy WebLinkAboutItem 8 PPP 11-10-2020 Administration - Biothermal Conversion RFI UpdateBiosolids Thermal Conversion RFIUpdate
Deirdre BingmanAdministration CommitteeNovember 10, 2020
2019 Strategic Plan: Biosolids Management Policy Paper
•Recognized
•Growing interest for organics management
•Rising concerns: emerging contaminants such as polyfluoroalkyl substances (PFAS)
•Biosolids Master Plan: emerging market opportunities
•Issue a request for information (RFI)
•Research and evaluate available emerging market
•Biosolids-to-energy options or other biosolids recycling operations
•Potentially develop scope of work
2
What is BTC?
•Onsite –Anaerobic Digestion (Current Practice)
•Solids (sludge) to Biogas
•Methane Recovery
•Biogas to Electricity
•Offsite –Biosolids Thermal Conversion (BTC)
•Biosolids (post digester treatment)
•Pyrolysis, Gasification, Oxidation
•Biosolids to Electricity, Biochar, and Oil High
Temperature
(>400°C)
• Biochar
• Bio-oil
• Gas to fuel process
• Electricity
• Ash for cement
3
State Water Board-ordered PFAS Sampling
4
Project Phasing & Considerations
GatherInformation
& Establish
Options
Evaluate
Performance
Assess
Needs
Implement
Phase 1
Phase 2
Phase 3
•Biosolids Thermal
Conversion RFI
•Haz Waste Landfill List Phase 4
•PFAS Sampling
•1-2 Small Tonnage
BTC contracts -PFAS
destruction demo
•PFAS Regulatory
Framework
•Decide how to
best mitigate
risk
•Potentially
update Biosolids
Master Plan
•Potential larger
scale BTC
contract if
needed to meet
regulations
5
BTC RFI Completed
5 Respondents
•4 with appropriate thermal temperatures
•3 with proven scalable technologies
•2 with short-term demonstration opportunities that are already funded to minimize OCSD risk
Viable Criteria for Initial BTC Facility
Short-
term
Timing
Full Scale
Temp
>400°C
6
Availability Timeframes
RFI
Responses
Notes Short-term
Availability
Long-term
Availability
Anaergia
Pyrolysis
•June 2021 Pyrolysis commissioning
•Only 60 miles from OCSD
•Faster expansion with existing permits
150 tpd
4 trucks
Non-Guaranteed
tons, easier
contract =
Low Risk
~300-600 tpd
50-100% of
OCSD tonnage
Guaranteed tons,
harder
off-ramps,
commissioning
Holloway
Gasification -
Pyrolysis
•All permits expected by December 2020
•Construction begins by Q3 2021
•~200 miles from OCSD
•Expansion opportunities (300 tpd ea.)
up to 100 tpd
4 trucks
~250-400 tpd
50-67% of
OCSD tonnage
Guaranteed tons,
harder
off-ramps,
commissioning
OCSD Biosolids Production:
6-day avg: up to 690 tpd, 27 trucks (current truck loading schedule); 7-day avg: up to 600 tpd, 24 trucks 7
BTC Next Steps
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