Presentation on theme: "Water Purification Comparison"— Presentation transcript:
1 Water Purification Comparison Ultrafiltration Reverse Osmosis UV Disinfection
2 Where does your water come from? Municipal water supplyWellLakeBore holeCistern
3 What is in your water? Bacteria- e. coli, other coliforms Viruses Parasites – Giardia, CryptosporidiumPesticidesFecal matterAlgaeMedications dissolved in drinking waterDissolved solids – salts, minerals, heavy metalsSuspended solids – dirt, silt
4 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.
8 Ultrafiltration In Use Physical barrier to contaminantsRemoves bacteria, viruses, parasites, pesticides, medications, algae, dirt, silt and other suspended solidsLow energy requirementGood for lakes, streams, wellsNot for seawater or brackish water
10 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.
11 Reverse Osmosis in UseRemoves dissolved salts, minerals, metals and sugarsRemoves 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 intensiveRequires prefiltration
15 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.
16 Ultrafiltration or Ultra Violet Designed for PRETREATED WATERUV is NOT A BARRIER to contaminating organisms.Effectiveness depends on water CLARITY, flow rate and bulb positionUV has NO SIMPLE FIELD TESTRequires POWER to illuminateHas NO TESTING CLAIMSPortable units for LOW CAPACITY treatment onlyRequires ABSOLUTELY CLEAR water sourceBest as final stageDesigned for NON POTABLE WATERUF provides a PHYSICAL BARRIER to organismsSystem REMOVES % of bacteria and % of virusesA SIMPLE integrity test validates performanceA LOW ENERGY requirementHas PASSED EVP/EVT test protocolFor HIGH CAPACITY filtrationVery LOW WASTE streamVery SIMPLE to setup and maintainProduces CRYSTAL CLEAR WATERDrinking water that TASTES GOOD
17 Ultrafiltration or Reverse Osmosis Designed for NON POTABLE WATERUF provides a PHYSICAL BARRIER to organismsSystem REMOVES % of bacteria and % of virusesA SIMPLE integrity test validates performanceA LOW ENERGY requirementHas PASSED EVP/EVT test protocolFor HIGH CAPACITY filtrationVery LOW WASTE streamVery SIMPLE to setup and maintainProduces CRYSTAL CLEAR WATERDrinking water that TASTES GOODDesigned for DESALINATION of brackish water or seawaterProvides a PHYSICAL BARRIER to contaminating organismsRemove 96-98% of DISSOLVED SALTS, MINERALS and METALSConcentrate from system is WASTE streamA SIMPLE TDS test to validateRO has HIGH ENERGY requirementBest for labs, hospitals or HIGH PURITY applications
18 Questions?Ron Castle Owner 111 First Avenue NW, Suite 2 Winchester, Tennessee USA Phone FAX Toll Free Mobile and SMS Skype ID roncastle