ADVANCED DESIGN ELECTROLYTIC RECOVERY SYSTEMS
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1 ADVANCED DESIGN ELECTROLYTIC RECOVERY SYSTEMS Pollution Prevention Technology Development Branch Presented By Dr. Katherine Ford 1KF5/94lhl
2 Agenda Process Description Cadmium Recovery System ERU Applications RDT&E Design Criteria Used Advanced Technology Features Field Test Program Copper Cyanide Silver Cyanide -- Tin-Lead Fluobroate -- Acid Copper -- Electroless Nickel Technical Transfer
3 _- Point Source Metal Recovery Workflow Fresh Water v Wastewaters Recovered Metal Benefits Reduces Wastewaters by 80% Reduces Metal Discharges up to 99% Treatment Cost Reduced Hazardous Sludge Disposal Reduced Recovery of Plating Metals 1JKBBotm.2
4 CATHODE REACTIONS. METAL CATIONS (M') -METAL PLATE (Mo) ANODE REACTIONS OXIDIZED ORGANIC ANIONS (CN-)-* C02 t N2
5 Background State-of- Technolocrv: One of Most Widely Used Methods for Recovery But Available Systems Designed for High Drag-out Flat-Plate Stainless Steel Electrodes Low Current Density, Initial Cd Conc. >500 ppm Batch Operation to Avoid Anode Corrosion Up to 99% Reduction Cd Discharges to Treatment Plant Implementation at NA VAIR Activities: NADEPs Norfolk, Pensacola, North Island, and Alameda; NAWC Indianapolis
6 ERU Design Criteria Minimum Circulation Rate 5 GPM Corrosion Resistant Anodes Open Electrolytic Cell Capital Cost e $15,000
7 OBJECTIVES: ERU Applications RDT&E Evaluate ADVANCED Electrolytic Recovery Technology - Metal Recovery Silver Copper Nickel Tin-Lead -- Cyanide Destruction Develop Design and Operation Parameters Tailored for Determine Impact for Navy Electroplating Waste Reduction -- To Reduce Discharges From Electroplating Operations To Reduce Sludge Production from lwps - To Recover Valuable Metals -- To Provide Potential Zero Discharge - To Determine Cost Avoidance
8 Advanced Technology Features Fluidized Bed Circulation High Surface Area Cathodes Oxidizing Anodes for Cyanide Destruction
9 .. Field Test Program Activity ADDlication CathodelAnode Circulation Norfolk NSY Copper Cyanide SS Flat Plate & Copper Mesh / Platinized Titanium Inlet Dispersion Norfolk NSY Silver Cyanide SS Flat Plate / Platinized Titanium Fluidized Bed NAWC Indianapolis Tin-Lead Fluoborate SS Flat Plate / Platinized Titanium Fluidized Bed NAWC Indianapolis Acid Copper Reticulated Copper / Iridium Oxide Titanium Air Sparged NADEP Cherry Pt Electroless Nickel Reticulated Nickel / Iridium Oxide Titanium Air Sparged
10 ERU: ACCA SEQUENCE RECTIFIER
11 Installation : Norfolk Naval Ship-yard RESULTS: ADHERENTPLATE 350 PPM FOR SS FLAT PLAT ADHERENT PLATE 20 PPM FOR COPPER MESH COPPER RECOVERY > 0.04 PPM CYANIDEDESTRUCTION > 8 PPM CONSISTENTLY MAINTAINED CU 15 PPM & CN 1 PPM 8 MONTHS ON-LINE AT ACTIVITY 1KFyByhJ.cn I
12
13 Installation : Norfolk Nava 1 Shipyard.,... Unit: Cathodes: Anodes: Circulation: BEWT SS Flat Plate Platinized Titanium Fluidized Bed RESULTS. ADHERENTPLATE.~ 80 PPM HIGH ~ PURITY RECYCLABLE SILVER SILVER RECOVERY 405 -> 0.08 PPM CYANIDEDESTRUCTION > 3.2 PPM TIME RECOVERY CUT BY 1 /2 I
14 INSTALLATION: NAWC, INDIANAPOLIS UNIT: BEWT CATHODES: SS Flat Plate ANODES: Non-Oxidizing CIRCULATION: Fluidized Bed Tin-Lead Fluoborate Recovery I Effect of Hydroquinone Addition to Tin Recovery * Sn + Pb + Snppm+4HO 0 Snppmonly IO Time (minutes) Tim Interval (minuter)
15 ERU: RETEC I / I / 7 ELECTROLYTIC CHAMBER RECllFlER
16 .. Copper Removal During Online Test i+gv+l jl.ja\t\x =x-. -X-X Elapsed time (hrs) Nickel Removal During Online Test 35 T apso3 Tic Oloun) REPEC TESTING
17 Installation: NmEP Cherry Point Treatment of 7 Gallons Spent Electroless Nickel Bath Treatment: Unit: Cathodes: Anodes: Recovery: Batch Mode RETEC Reticulate Carbon-Nickel Iridium Oxide Titanium 24 Hours
18 Operation Test Report (OTR),. User's Data Package (UDP) Technology Dqfa Sheets (TDS) Point of Contact for Implementation: Michael Viggiano Information & Technology Transfer Branch DSN
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