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Treatment Plant Ozone Treatment Plant Ozone Retrofit ProgramRetrofit Program
California Unified Program 8California Unified Program 8thth Annual Training Conference Annual Training ConferenceFebruary 8, 2006February 8, 2006
Presented by: Presented by: Paul G. BeswickPaul G. BeswickMetropolitan Water District of Southern CaliforniaMetropolitan Water District of Southern CaliforniaEnvironmental Support ServicesEnvironmental Support Services(213) 217-5533(213) 217-5533 [email protected]@mwdh2o.com
Southern California’s Imported WaterSouthern California’s Imported Water
California Aqueduct
ColoradoRiver
Aqueduct
SERVICEAREA
Lower SalinityHigh DBPs
High SalinityLow DBPs
Drivers for Treatment Improvements
Drivers for Treatment Improvements
Water Quality– Regulatory compliance– Salinity management– Taste-and-odor control
System Operations– Remove plant capacity limitations–Maximize flexibility of supply
Plant Process LayoutPlant Process Layout
Plant Process Flow DiagramPlant Process Flow Diagram
Meter FlashMix
Flocculation Sedimentation FiltrationFinished
WaterReservoir
Filter AidChlorineAmmonia
AmmoniaChlorineCaustic
PolyChlorineAlum/Ferric
Floc Aid
To MemberAgencyConnection
OzoneContactors
OxygenGeneration
OzoneGeneration
HydrogenPeroxide
OzoneOzone Destruct
Acid CausticLOX
ORP General Design CriteriaORP General Design Criteria
Plant Flow Range is 60 to 750 MGDPlant Flow Range is 60 to 750 MGD
Design Ozone Dose of 2.6 mg/L at 750 mgdDesign Ozone Dose of 2.6 mg/L at 750 mgd
8.6% Design Ozone Concentration8.6% Design Ozone Concentration
O3 Generation up 15,000 lb/dayO3 Generation up 15,000 lb/day
Contactors Designed for 10 Minute HDTContactors Designed for 10 Minute HDT
Ozone Process Flow DiagramOzone Process Flow Diagram
LOX
TANK
OPERATING = 2
STANDBY = 1
FUTURE = 1
OPERATING = 1
STANDBY = 1
DEFROST = 1
FUTURE = 1
LOX
VAPORIZER
LIQUID OXYGEN FEED
GAS SYSTEM
PSU
OZONE
GENERATOR
OPERATING = 4
STANDBY = 1
FUTURE = 2
OZONE
GENERATION
SYSTEM
OZONE
CONTACTOR
OZONE
CONTACTOR
SYSTEM
VENT OZONE
DESTRUCT SYSTEM
OPERATING = 6
STANDBY = 0
FUTURE = 2
OPERATING = 5
STANDBY = 1
FUTURE = 4
OPERATING = 2
STANDBY = 1
FUTURE = 1
HEATER
OZONEDESTRUCTCATALYST
BED
DESTRUCT
BLOWER
NITROGEN SYSTEM
COMPRESSORRECEIVERTANK
DRYER
OPERATING = 1
STANDBY IS A
BOTTLE SYSTEM
ORP Chemical StorageORP Chemical StorageUnit Qty Capacity
Ozone N/A 90 pounds
LOX Tanks 3 44,000 gal. ea.
Hydrogen Peroxide (35%) 2 2,000 gal. ea.
Sulfuric Acid (93%) 2 80,000/25,000 gal.
Caustic (25%) 8 127K/50K gal.
Chlorine 3 90 ton rail cars
Aqueous Ammonia (19%) 4 13,000/10,000 gal.
Sodium Hypochlorite (5.25%) 2 2,000 gal.
LOX Tank FarmLOX Tank Farm
Ozone BuildingOzone Building
Ozone GeneratorsOzone Generators
Ozone Contactor Schematic
OzoneOzone Feed Gas
Ozone Off Gas
Hydrogen Peroxide
RawWater
Contactor GalleryContactor Gallery
Lessons LearnedLessons Learned Standardized Alarm Beacons Disconnected Sample Line Vent to Contactor Warning Signals on Ozone Building Roof Safety Signs Throughout Facilities Automatic Shutoffs in Boiler Room New Gasket Material for Sulfuric Acid New Gasket Material for Ozone System Contactor Sample System Modification Added check valve at O3 generator outlet Seal Drain Sumps and Contactor Cover Plates 1 Year Life on O3 Ambient Detector Probes
