Large Diameter Seawater Reverse Osmosis Elements A Year s Operation in Chile Raúl Cirerol Process Engineer South America Koch Membrane Systems
Overview RO Technology Brief Review Large Diameter RO Technology Large Diameter RO for Seawater Desalination Case Study: Michilla Port Large Diameter Seawater RO Installation
Separation Range UF vs. RO UF RO High Molecular Weight compounds Particulates/ Colloids Monovalent ions Divalent ions Particulates/ Colloids Monovalent ions Divalent ions High Molecular Weight compounds
Spiral Element
Spiral Wound Element First (c. 1964) to Latest Technology First spiral prototype Large Diameter RO Element, 3050 ft 2
Large Diameter Reverse Osmosis
Reductions in: RO & NF Spirals Why Larger Elements? Skid piping Footprint Civil costs Installation costs Construction schedule Overall system cost
KMS Large Diameter Elements 18-in diameter 61-in long 3,050 sq ft membrane area Factor of 5 scaling over 8-in
MegaMagnum Elements 8 ID 8 x 40-400 ft 2 18 ID 18 x 61 3,050 ft 2
Element Comparison TFC-HR TFC-HR TFC-HR TFC-HR TFC-HR TFC-HR TFC-HR 8 x 40 x seven long typical elements Typical seven long vessel = one MegaMagnum Element TFC-HR MegaMagnum TM Element TFC-HR MegaMagnum TM Element TFC-HR MegaMagnum TM Element TFC-HR MegaMagnum TM Element TFC-HR MegaMagnum TM Element One MegaMagnum Vessel = Five typical 8 vessels 18 x 61 x 5 long per MegaMagnum Vessel
8 versus 18 Comparison 0.5 MGD Brackish Water Rack 3-18 diameter vessels 15-18 x 60 elements Only 9 + connections 16-8 diameter vessels 112-8 x 40 elements 48 + piping connections
Automatic Element Winding Winding large diameter elements requires automatic rolling robotic gluing
Element Interconnection Permeate Interconnector Up-Stream or High Pressure Element O-rings Face Seal Down-Stream Element
Brine Seal Pressure Plate ATD retains brine seal to eliminate fluid by-pass Face Seal High Pressure Element Brine Seal Permeate Adapter
Brine Seal High Pressure End Low Pressure End Element-Vessel Brine Seal
Large Diameter Element Loading
ASME-rated pressure vessels developed exclusively for KMS Brackish water 300 and 450 psi Seawater 1200 psi Pressure Vessels
Installations of Large Diameter RO Elements Brackish Water Installations
Brackish Water Systems Drinking Water Waupun, WI Tate Monroe Water Authority, OH Feed Source: Well Water Capacity: 315 m 3 /hr (2 mgd) System: 2 x MM6 Trains
Bundamba, Australia Feed Source: MF Pretreated Municipal Effluent Capacity: 2,800 m 3 /hr (17.5 mgd) System: Nine MM13 Trains (7:4:2 array) Phase 1A: 4 Trains, Commissioned 2007 Phase 1B: 5 Trains, Commissioned 2008
Joe White Maltings, Australia 2:1 array, 15 ULP elements Commissioned April 2006 PURON MBR treats industrial wastewater to produce 400,000 gpd RO reduces TDS so effluent can be reused
JWM, Australia
City of Goodyear, AZ 0.5 MGD MM3 System Treats brackish well water for potable use Transportable system MegaMagnum system chosen due to space savings Commissioned May 2007
City of Goodyear, AZ
City of Waupun, Wisconsin 2 MGD 2 x MM6 Systems Treats well water to produce potable water Start up Q4 2007
Bundamba Stage 1A and 1B Queensland, Australia Western Corridor Wastewater Recycle Project Municipal effluent reuse 1A 1B # Trains 4 x MM13 5 X MM13 Capacity 7.9 MGD 9.9 MGD Startup August 2007 Q1 2008
Large Diameter RO Elements Seawater Desalination
Eilat, Israel First Large Diameter Seawater Test Site 400 m 3 /hr (2.6 mgd) 148 x 8-in Elements Single 18-in Vessel MegaMagnum Vessel
MWD, Yuma, AZ Metropolitan Water District of Southern California Planning for future large RO plant 500,000 gpd demonstration plant Commissioned late 2005 Data showed elements met specifications Specific Flux Rejection
Case Study: Michilla Port Seawater RO Large Diameter Installation
Chile Mining Industry Michilla Port Esperanza Mine owned by Antofagasta Minerals Copper-gold mine in Northern Chile Mine port needed fresh water for potable & industrial use Water is scarce & expensive Authorities require mines to use seawater Antofagasta contracted Nicolaides S.A. Engineer, system integrator, initial operator Seawater desalination system for Michilla Port
Design Water Quality Influent Effluent Chlorides (mg/l) 22,000 24,000 250 Conductivity (µs/cm) 50,000 53,000 TDS (mg/l) 39,000 43,000 500 Sulfates (mg/l) 2,500 2,700 Temperature: 12-17 C
System Capacity Phase 1 Capacity 20.5 m 3 /hr (90 gpm / 130,000 gpd) Single train MM1 Commissioned June 2009 Phase 2 Capacity 82 m 3 /hr (360 gpm / 520,000 gpd) 2 trains MM2 Commissioned January 2010
Process Overview
Seawater Vessel Arrives on Site
Prefilters Amiad 50 & 3 micron 1 micron cartridge filter 50 micron filter 3 micron filter
Large Diameter RO Systems MM1 System Operated for 1 year 2 x MM2 System Started up in January 2010
Michilla Port RO Systems
MM1 System Performance System produced water of required quality Design & actual flux 14.5 lmh (8.5 gfd) Salt passage relatively stable Declining permeability & increasing element pressure drop RO feed SDI 15 4-6 relatively high Temporary intake & pretreatment issues
Full Scale System Performance Intake location and pretreatment design parameters changed RO feed significantly improved Turbidity ~ 1 NTU SDI 15 2.5 3.5 most of time Design flux 14.5 lmh (8.5 gfd) Actual flux 12 lmh (7.5 gfd) Low water demand System operation Stable flux, salt passage, pressure drop across elements Both trains perform the same
Full Scale System Performance Water quality meets requirements Low operating flux helps keep system stable even when there are pretreatment upsets Field performance good fit to ROPRO projections
Summary Large diameter elements proven in many applications Large diameter seawater RO systems now in operation Just like for 8-inch systems, pretreatment is important!
Questions?