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The efficiency of ultraviolet irradiation for the sterilisation of water
Ultraviolet disinfection is now a well-proven and accepted technology for a wide range of water treatments.
Ultraviolet kills microorganisms by penetrating the cell wall and rearranging the dna thereby preventing the organism from reproducing.
Ultraviolet disinfection not only eliminates the storage and use of toxic chemicals, it eliminates environmental concerns and provides the ability to save considerable costs in water supply.
Pristine water systems is happy to answer your questions on ultraviolet sterilization or any queries you may have regarding the cleaning and treatment of water.
Media Filter
Whole of house filters
Calcite Filter
From domestic, farm water to Industrial water for pH correction, or acid water conditions where pH is lower than 7
The media is calcite rock which is filled not higher than 300mm from top neck of the cylinder.
The low pH water enters the chamber by a simple 40 mm manifold, flows through the calcite rock which automatically dissolves and corrects the pH to a level at or above 7.
Unit has a back flush head to enable periodic flushing to remove any sand, grit, or other impurities that may accumulate
Port hole entry allows access to the top of the vessel for topping up of calcite at least annually.
Post washable or disposable filter should be fitted after unit for domestic use to avoid calcium dust from clouding water.
This is internationally recognized as the most successful and safest method of correcting low pH and corrosive water conditions.
The vessel is a spun wound fibreglass unit tested to 600kpa.
The manifold is UV stable durable plastic.
Granulated activated carbon
About Carbon
Carbon is a substance that has a long history of being used to absorb impurities and is the most
powerful absorbent known to man.
For centuries, sailing vessels used it to store drinking water for long voyages. Carbon is also commonly used as an effective antidote for swallowed poisons.
Activated carbon is carbon which has a slight electro-positive charge added to it, making it even more attractive to chemicals and impurities. Loose granular activated carbon (GAC) is used
extensively in most of the commonly encountered water filters today. Most of these filters have ratings as simple taste and odor filters or as pre-filters designed to remove initial dirt, rocks, sediment, etc. When water is forced through a substrate of GAC (which has the consistency of sand or coffee grounds) it takes the path of least resistance and makes its own channels through the GAC in the filter.
What this means is that the water being filtered is notcontacting the GAC for enough time to allow complete absorption of impurities to take place. Man impurities seep through along with the "filtered" water. This fitler enables you to back wash the filter, in turn reseating the carbon bed and changing the waters path to maximise filtering ability. This cannot be done easily with canister type filters such as the big blue systems.
About Silver Carbon
When the water passes through the GAC, some bacteria (primarily heterotrophic) are trapped in the substrate, too. The problem is that these trapped bacteria multiply prolifically in the warm, moist oxygen-containing environment among the grains of GAC. Because the GAC is loose, there is no barrier to keep any bacteria growing inside the filter from coming out with the water pushed through each time the filter is used.
Silver impregnated carbon, although more expensive, prevents the bacterial colonies from habituating in the carbon. It’s common for Silver carbon to last 5 times longer than standard GAC on non treated water . Silver GAC should be considered for tank, bore , or river water, if untreated if your water prematurely goes smelly or slimey as a result of bacterial contamination.
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