ADVANCED DESIGN ELECTROLYTIC RECOVERY SYSTEMS Pollution Prevention Technology Development Branch Presented By Dr. Katherine Ford 1KF5/94lhl
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
_- 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
CATHODE REACTIONS. METAL CATIONS (M') -METAL PLATE (Mo) ANODE REACTIONS OXIDIZED ORGANIC ANIONS (CN-)-* C02 t N2
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
ERU Design Criteria Minimum Circulation Rate 5 GPM Corrosion Resistant Anodes Open Electrolytic Cell Capital Cost e $15,000
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
Advanced Technology Features Fluidized Bed Circulation High Surface Area Cathodes Oxidizing Anodes for Cyanide Destruction
.. 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
ERU: ACCA SEQUENCE RECTIFIER
Installation : Norfolk Naval Ship-yard RESULTS: ADHERENTPLATE 350 PPM FOR SS FLAT PLAT ADHERENT PLATE 20 PPM FOR COPPER MESH COPPER RECOVERY 421 --> 0.04 PPM CYANIDEDESTRUCTION 550 --> 8 PPM CONSISTENTLY MAINTAINED CU 15 PPM & CN 1 PPM 8 MONTHS ON-LINE AT ACTIVITY 1KFyByhJ.cn I
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 600 --> 3.2 PPM TIME RECOVERY CUT BY 1 /2 I
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 0 1000 2 IO Time (minutes) Tim Interval (minuter)
ERU: RETEC I / I / 7 ELECTROLYTIC CHAMBER RECllFlER
.. Copper Removal During Online Test 70 60 - i+gv+l 5 50 6 20 jl.ja\t\x 10 -- =x-. -X-X-- -6 18 42 66 90 114 138 162 186 210 234 258 282 306 330 354 378 402 426 455 Elapsed time (hrs) Nickel Removal During Online Test 35 T 0 48 96 144 192 240 288 336 384 432 480 528 576 apso3 Tic Oloun) REPEC TESTING
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
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 551-4895 1