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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 8 Mi l e s t o n e G o a l s