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Home My WebLink About05.a.2) (Handout) Nutrient Facility Plan and Site Characterization Final ReportNutrient Facility Plan & Site Characterization Final Report January 23, 2014 Samantha Engelage, P.E. Tim Potter Assistant Engineer Superintendent Capital Projects — Treatment Plant Environmental Compliance Central Contra Costa Sanitary District Permit Requirements • "Facility Plan & Site Characterization Report" — Submit by February 28, 2014 — Report must: • Evaluate alternative treatment technologies to remove ammonia from [the District's] discharge, including nitrification technologies. The evaluation shall include facility planning for a range of potential ammonia effluent limits ... [and an evaluation of] the suitability of the Facility and property owned or controlled by the [District] to provide land necessary for ammonia treatment and removal. (NPDES Permit No. CA 0037648, Section Vl. C.5. d. ii) s.a.2) (Nandwl)- 1 Facility Plan & Site Characterization (NPDES No. CA 0037648, Section VI.C.5.d.1i) Element 1: Element 2: Plant Optimization Nutrient Removal (near term w/existing facilities) Facilities Plan BioWinlm Model Configuration Total Nitrification Study Update Field Verification of Primary Sedimentation Basin Baffles Visioning Plan: Cutting - Existing Plant Optimization Edge Technology Review for Ammonia Removal Recycled Water Recycled Water 20 MGD Refinery Study 5 MGD Refinery Study 11 Site - Specific Nitrification Rate Tests II Inhibition Remediation Element 3: Site Characterization ntaminated soil disposaVireatment for new facilities) Cyanide Study- Nitrification Rate • Objective: — Find max & inhibited site - specific nitrification rates for refining design parameters & costs • Results — Max = 0.71 d-' — Inhibited = 0.67 d-) — Typical = 0.9 d-t — Insignificant inhibition from wet scrubber return stream (needs scaled -up and /or field verification) 2 Cyanide Study - Remediation • Objective: - Evaluate cyanide treatment alternatives for application at CCCSD in the case of significant inhibition • Results - Conducted vast literature review & evaluation - Two final approaches: biological treatment & thermal destruction - Biological treatment recommended: • Capital - $385,000 • O &M - $2,000 /year Element 1 - BioWinTM Model Configuration Objective: - Develop a site - specific treatment process model for use in other projects (e.g., Plant Optimization, Total Nitrification, etc.) • Results - Configured & calibrated process model 3 Element 1 — Field Verification of PSB Baffles • Objective: - Verify enhanced settling and decreased aeration demand/costs predicted from earlier modeling • Results Settled sludge & pBOD Aeration & natural gas usage Future Nitrification capacity O &M Savings - $149,000 /year Capital - $648,000 Baffle system to be installed under Primary Renovations Project Element 1 — Plant Optimization for NH3 -N Removal • Objective: - Evaluate secondary reconfigurations & upstream modifications for near -term NH -N a a �-�- removal • Results - Preferred Optimization: • Plug -flow activated sludge, split flow treatment with enhanced screenings removal • Capital -$5 -7 million • O &M -$750,000 /year - Annual Avg. Concentration -13 mg /L NH3 N (current - 25mg /L) (needs field verification) A BOD Removal Mfi Removal SRT 2 days SPT-� 7 days Flow = 1-80mg, F1 w— ,20Mgd North Clarifiers So�rth Clarifiers I I n MU Element 2 -Total Nitrification & Nutrient Removal Study Update Objective: - Updated design parameters & costs with new information (e.g., site - specific nitrification rate) for Iona -term. conventional nutrient removal • Results - Evaluated 5 potential discharge limits using conventional N & P treatment - Facility requirements & costs depend on level of treatment: • Capital -$112 - 239 million • O &M -$3 - 8 million /year • Not including soil remediation costs 61 Capital Annual O&M Treatment Description Basis of Level N/D + EBPR National Total Nitrogen - 8.0 mg/L Resources 143 2.98 7.52 Total Phosphorus - 1.0 mg/L Defense Council N/D + EBPR+ CEF National Total Nitrogen - 5.0 mg/L Resources 200 4.57 10.9 Total Phosphorus - 0.5 mg/L Defense Council N/D + EBPR + CEF National Total Nitrogen - 3.0 mg/L Resources 239 6.27 13.9 Total Phosphorus - 0.3 mg/L Defense Council N/D+ CEPT National Total Nitrogen - 8.0 mg/L Resources 112 4.57 8.12 Total Phosphorus - LO mg/L Defense Council_ N/D + CEPT+ CEF National Total Nitrogen - 5.0 mg/L Resources 175 6.05 11-6 Total Phosphorus - 0.5 mg/L Defense Council N/D + CEPT+ CEF National Total Nitrogen - 3.0 mg/L Resources 211 7.98 14.7 Total Phosphorus - 0.3 mg/L Defense Council N/D Ammonia- lltmgen - 2.4 mg/L Sacramento 117 3.50 7.22 Nitrate /Nitrite - Nitrogen -10.0 mg/L Regional Conventional Nitrification Ammonia-Nitrogen - 2.0 mIVL City of Stockton 115 3.20 6.86 NM - nitrllloatloq/denitrlllsatlon; EBPR - enhanced biological phosphorus removal; CEF - chemically enhanced filtration; CEPT- chemicaly enhanced primary/phosphors treatment •Operations and Maintenance costs Include power and chemicals for now treatment processes only. **Comb am amortized over 50 years at two percent Interest 61 Element 2 — Visioning Plan • Objective: - Capture state of cutting -edge nitrogen removal technology - Evaluate technologies for capital & O &M savings for future application at CCCSD • Results - Conducted vast literature review & evaluation Identified 22 technologies for further tracking & 5 for further evaluation Could significantly reduce capital & O &M costs of nitrogen removal but requires further study Cutting -Edge Technologies Conventional BNR • Step Feed BNR • Simultaneous NitrificationDenitriflcatlon • Adsorption /Bio- oxidation (A/B) • Integrated Fixed Film Activated Sludge (IFAS) • Ballasted Activated Sludge (BAS) • Biological Aerated Filter (BAF) • Granular Activated Sludge • Algae • Treatment Wetland • Aerobic & Anaerobic Membrane Bioreactor Nitritation /Denitritation • Nitrite Shunt • Nitritation- Denitritation Through Modulating Aeration (NIDeMA) Physical Removal • Liquid -Gas Stripping Anaerobic Ammonium Oxidation (Anammox) • Mainstream Anaerobic Ammonium Oxidation (Anammox) • DEMON® • ANITA7m MOX • Zeollte- Anammox Combined Autotrophic Nitrogen Removal • SHARON® • Canon • OLAND Chemical Precipitation • REM -NUT® • Struvite Recovery • Zeolite Ammonia Removal • Ammonia Recovery Process (ARP 9 Element 2 - Visioning Plan Cont. k E Adsorption /Bio- oxic`ation BioStyr Final Generation, BioMag Mature Technology E 3 Second Generatlon Demonstation Pilot O �— First Applications NiDeMA Time Zeolite- Anammox Element 3 - Site Characterization • Objective: — Define vertical and lateral extent of contamination in study area — Identify disposal options and estimated costs of excavated soil • Results — No samples exceeded RCRA Hazardous Waste criteria — Some samples exceeded CA Hazardous Waste criteria (est. 14% of volume excavated) — Some areas more contaminated than others within study area — Two primary disposal options • On -site consolidation (Pond A) • Transportation to off -site disposal facility OHO 7 Element 3 - Site Characterization Summary of Costs • On -Site Consolidation (Pond A becomes Mound A) - $8,200,000 Capital Cost - $230,000 O &M Cost (15 years well monitoring) - Min /Max Range $4,620,000 to $9,890,000 - Requires DTSC Approval • Transportation To Off -Site Disposal Facility - $34,000,000 Capital Cost - Min /Max Range $19,040,000 to $40,790,000 - Waste Profiling of 1500 cy stockpiles in Pond A - Disposal as CA Hazardous Waste and Non - Hazardous Waste Assumes maximum excavation (approx. 90 -95% of study area) Capital costs include $1.9 million for shoring Estimated to take 150 -175 days to complete Recycled Water- Refinery Studies • Objective: - Determine facility requirements & cost estimates • Results: - 5mgd with nitrification /denitrification • Capital -$31 million • O &M - $900,000 - 20mgd with nitrification /denitrification • Capital -$85 million • O &M --$3.5 million E -CS71D_ Summary • Capital Cost Estimates: Near Term NH3-N Removal Modifications $5 - 7 million Long Term Nutrient Removal Transition $112 - 239 million Soil Remediation $5 - 41 million Recycled Water 5 MGD Nutrient Removal $31 million Recycled Water 20 MGD Nutrient Removal $85 million • Spent -$2 million on internal & external Planning & Pre - design efforts for compliance Could potentially decrease costs with cutting -edge technology and /or recycled water projects but need sufficient time to investigate further D Permit Compliance Next Steps... • Summarize results from all projects in one final report & submit to Regional Board by 2/28/14 • Track & evaluate requirements of Watershed Permit "fS � E Planning's Next Steps... • Integrate results from numerous projects into a Treatment Plant Master Plan and /or Plant of the Future exercise • Field verify assumptions & modeling predictions • Track & evaluate cutting -edge technologies — Pilot collaboration opportunities CRI 10