The URL can be used to link to this page

Home My WebLink AboutPPP 10-01-14 Ops - Item 7 AquaCritox Research Opportunity : Super Critical Water Oxidation GO Njy SANITgT o� � � O U r Q 9 h 9or�cl/N0 THE Next Generation Solids Processing & Energy Opportunities ry APPROVED Strategic Goals — Future Biosolids Management Options — Study H v biosolids management options including 3rd party , contracts and onsite capital facilities. — Energy Efficiency — Continue to research new energy efficiency and energy conversion technologies. ' i General Manager's Work Plan — Research — Finalize fuel cell research project and present findings with recommendations to the Board of Directors by December 31, 2014. Identify and propose two research opportunities to the Board of Directors by June 30, 2015. — Energy Efficiency — Evaluate OCSD facilities, through an energy audit, to identify energy savings strategies that are economically and operationally feasible. Present findings and recommendations to the Board of Directors by June 30, 2015. MIME Driving Forces • End of life repair / replacement decisions in next few years • Seismic concerns • Traditional technologies expensive, large footprint • Seeking opportunities to use more resources (energy, biosolids) locally and reduce truck traffic • Seeking higher operating efficiencies and cost savings • Seeking increased reliability andindependence l - Biosolids Land Application) � I Y J What is Supercritical Water Oxidation ? • Highly efficient process for converting any organic material to harmless gases and useful steam / electricity • Positive energy recovery, complete organic destruction, and negative carbon footprint in one step • Used for 20 years in other industries to destroy chemical weapons, PCB's and recover industrial catalysts. Orange SCWO Process and Byproducts Electricity F Thermal Energy H20 Safe discharge } . . • • Wet Waste • i i Mw (16% ry Solids) • Resale potential 1 Safe discharge 06 02 Inert Solids Recycle SCWO = Supercritical Water Oxidation SCWO Potential Benefits • Energy resources recovered onsite (closer to energy independence - 90% of biosolids fuel value turned into electricity) • Saves trucking of biosolids (total annual budget $17m) • Air quality improvements (fewer truck trips) • Reduced O&M costs A : • Reduced greenhouse gas emissions (no methane; sequester CO2) • Only hauling mineral product; potential recovery for fertilizer • Potential COZ recovery & sale • Simplified (fewer) processes and reduced footprint / space savings in treatment plant • Increased Chemical security (fewer chemicals needed) JWML SCWO = Supercritical Water Oxidation Orange County Sanitation District Why AquaCritox° ? • Small pilot plant experience in Ireland • Process Controls Partnership with Rockwell Automation • Different approach than Orlando p p • Liquid oxygen control is unique �l • Few moving parts SCWO = Supercritical Water Oxidation Orange County Sanitation • for you. Opportunity for Investigation - F (1 . w • Model A30 (equals — % digester) • Smallest commercial size available = 1 • 18-24 months construction • Evaluate performance and costs of processing OCSD primary solids "g • Evaluate potential challenges : — Screening — Reliability — Corrosion — Energy Conversion Orange County Sanitation District We're here for you. Utilities Interested in OCSD Project us us • City of Atlanta (GA) Misco Water • City of Los Angeles (CA) Toho Water Authority (FL) • Charleston (SC) Water System Sanitary District #1 (KY) • Charlotte Mecklenburg (NC) Louisville (KY) • Columbus (GA) Water Works • Alexandria (VA) Renew • Beaufort Jasper (SC) Water & Sewer International • New York City DEP (NY) Severn Trent Water (UK) • City of Akron (OH) Thames Water (UK) • City of San Diego (CA) Scottish Water (UK) • Encina Wastewater Authority (CA) Aqualia (Spain) • American Water (throughout US) Sydney Water (Australia) • East Bay MUD (CA) Queensland Urban Utilities (Australia) • SA Water (Australia) • United Utilities (UK) • Singapore Public Utilities Board mod Orange County Sanitation 1 for you. Opportunity for Grants Supercritical Water Oxidation (SCWO) pilot • Staff have identified a California Energy Commission Grant opportunity for up to $5 million with a November deadline. • Staff believe air quality, water quality, and transportation grants may exist. • Need authorization to negotiate to determine terms Orange Staff's Request Support staffs recommendation to create a proposal for future Board of Directors consideration that will include: • A research plan with cost and schedule estimates • A contract for consideration with the technology owner including intellectual property considerations • Grant funding opportunities • Partnering opportunities with other agencies • Partnering opportunities with private firms Orange County Sanitation District `« d d Ai� pp p p Orange County Sanitation District We're here for you. How does SCWO differ from ET? EnerTech Lessons Learned SCWO Benefits • "Waste-side streams" • Only ash, CO2, and H2O left • Scaling up from pilot — • Limited scalability risk - complicated process despite modular (one internal pipe in reactors; all pieces being "off the economizers already scaled) shelf" $ 180 million and still • Full scale implementation is investing in re-design $33m for largest unit Orange County Sanitation District We're here for you. SCWO Process Pure products Steam / electricity Steam CO:, N,, 0, Steam Regulating Generator Valve f Separator _ f Cooler Econanizer Cleaned Water Oxygen 1 dry ton feed = 1 MWh + Inorganic renewable electricity Mineral Residue wale High-sk4ge Pressure 011� Peed Pump Gnnder Pump Rea_. • No biosolids remaining • 97% mass reduction (100 lb ink 3 lb out) 90% energy recovery SCWO = Supercritical Water Oxidation Plant 2 Digesters Age -- }\ 4. i_1 Y91 �INwW�oiv..n.� 13491 •L•NY�MKC I1 IMMYiw�al y. �. SCWO History • 1980s: Developed at MIT and UTexas • 1994+: Used for hazardous material destruction and catalyst reprocessing • 2007: SCFI Group (Ireland) buys technology from Chematur (Sweden) • SCFI AquaCritox°: — SCWO applied to biosolids and WWTP uses — 6 years / >4500 hours operation at SCFI Cork site SCWO = Supercritical Water Oxidation Orange County Sanitation District We're here for you. SCWO Economics Current biosolids O&M costs (@ 15% TS) $ 50/ton AquaCritox® O&M costs 25 ton Direct savings $25/ton Plus: value of electricity generated + 17 ton Operating cash surplus over current practice $42/ton Less: capital cost (15 years) 19 ton Direct cost savings* $23/ton 46% less * NOT including savings from retiring existing processes, recovering CO2 or P, or on-site Oz generation ** Current biosolids hauling budget average cost$63/ton and $17m/year SCWO = Supercritical Water Oxidation Orange County Sanitation • for 1 Opportunities for full implementation • A100 = -2 digesters • A200 = -4 digesters • Upgrade Plant 1 to A100 (same site) or A200 (new site) • New A200 at Plant 2 Versus : • Comparative equipment costs: 100_200 A30 $10M ($525 / TPY) A100 $21M ($325 / TPY) million(??) to A200 $33M ($265 / TPY) rehab/replace existing