Transcript UF comparison to UV

Water Purification Comparison
Ultrafiltration
Reverse Osmosis
UV Disinfection
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Where does your water come from?
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Municipal water supply
Well
Lake
Bore hole
Cistern
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What is in your water?
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Bacteria- e. coli, other coliforms
Viruses
Parasites – Giardia, Cryptosporidium
Pesticides
Fecal matter
Algae
Medications dissolved in drinking water
Dissolved solids – salts, minerals, heavy metals
Suspended solids – dirt, silt
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How Filtration Systems Work
• Ultrafiltration sieves out contaminants by molecular size and
weight.
• Reverse Osmosis sieves out contaminants AND removes
dissolved solids (salts, minerals, metals and other ions).
• Both Reverse Osmosis and Ultrafiltration systems create a
barrier to remove contaminants.
• Pore size is extremely small on reverse osmosis systems and
a bit larger on ultrafiltration systems.
• The pore size affects the amount of pressure, and therefore
energy, required to push the water through the membrane.
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Filter Membrane
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Size Matters
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What Filtration Systems Remove
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Ultrafiltration In Use
• Physical barrier to contaminants
• Removes bacteria, viruses, parasites,
pesticides, medications, algae, dirt,
silt and other suspended solids
• Low energy requirement
• Good for lakes, streams, wells
• Not for seawater or brackish water
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Ultrafiltration
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Definition of Reverse Osmosis
• High pressure feed water is forced against a dense,
membrane surface.
• Water molecules diffuse through the membrane leaving the
concentrated salts, other ions and contaminants behind.
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Reverse Osmosis in Use
• Removes dissolved salts, minerals, metals and sugars
• Removes algae, bacteria, viruses, parasites, pesticides,
medications, dirt, silt and other suspended solids.
• Best method for producing very pure water.
• Only viable method for large volume desalination of brackish
water or seawater.
• Energy intensive
• Requires prefiltration
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Reverse Osmosis For Salt Water
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Ultra Violet Light system In Use
• Feed water flows past an ultra violet light bulb.
• The UV rays destroy the DNA in organisms.
• Effectiveness is determined by water clarity, flow rate and
UV ray output.
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Ultra Violet Light Kills DNA
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Ultra Violet Light Pros and Cons
• Effectiveness-UV light destroys DNA in bacteria and viruses,
effectively killing the organism.
• The light source must be sufficiently bright and the feed water must
have the proper flow rate to be effective. Difficult to determine
effectiveness without lab testing.
• Turbidity-Dissolved solids that turn water dark will also block
UV light, making it much less effective.
• The feed water must be absolutely clear to effectively kill all the
organisms.
• Limitations UV only kills microorganisms.
• UV cannot remove salts, minerals, heavy metals, pesticides and other
inorganic compounds from water.
• Best as a final stage after ultrafiltration or reverse osmosis.
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Ultrafiltration or Ultra Violet
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Designed for NON POTABLE WATER
UF provides a PHYSICAL BARRIER to
organisms
System REMOVES 99.9999% of
bacteria and 99.999% of viruses
A SIMPLE integrity test validates
performance
A LOW ENERGY requirement
Has PASSED EVP/EVT test protocol
For HIGH CAPACITY filtration
Very LOW WASTE stream
Very SIMPLE to setup and maintain
Produces CRYSTAL CLEAR WATER
Drinking water that TASTES GOOD
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Designed for PRETREATED WATER
UV is NOT A BARRIER to
contaminating organisms.
Effectiveness depends on water
CLARITY, flow rate and bulb position
UV has NO SIMPLE FIELD TEST
Requires POWER to illuminate
Has NO TESTING CLAIMS
Portable units for LOW CAPACITY
treatment only
Requires ABSOLUTELY CLEAR water
source
Best as final stage
Ultrafiltration or Reverse Osmosis
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Designed for NON POTABLE WATER
UF provides a PHYSICAL BARRIER to
organisms
System REMOVES 99.9999% of
bacteria and 99.999% of viruses
A SIMPLE integrity test validates
performance
A LOW ENERGY requirement
Has PASSED EVP/EVT test protocol
For HIGH CAPACITY filtration
Very LOW WASTE stream
Very SIMPLE to setup and maintain
Produces CRYSTAL CLEAR WATER
Drinking water that TASTES GOOD
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Designed for DESALINATION of
brackish water or seawater
Provides a PHYSICAL BARRIER to
contaminating organisms
Remove 96-98% of DISSOLVED
SALTS, MINERALS and METALS
Concentrate from system is WASTE
stream
A SIMPLE TDS test to validate
RO has HIGH ENERGY requirement
Best for labs, hospitals or HIGH
PURITY applications
Questions?
Ron Castle
Owner www.sunshineworks.com
111 First Avenue NW, Suite 2
Winchester, Tennessee 37398-1643 USA
+1.931.962.8665 Phone
+1.888.878.6014 FAX Toll Free
+1.931.607.1392 Mobile and SMS
[email protected]
Skype ID roncastle
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