It is important to ensure that the pipes are not corroded or leaky; waste¬water or solid wastes do not leach into drinking water pipes and the effluents (especially the industrial effulents) do not leach water tables. contaminants in water and (c) Ambient temperature of water.
Activated carbon (AC) is definitely not charcoal. It is a charcoal-like substance made from coal, wood or even petroleum products, treated with. steam and very high heat in absence of Oxygen. The resultant product is extremely porous and has a very high surface area. Contaminants are adsorbed (not absorbed) by carbon. (Adsorb means cling to surface). It can remove Volatile Organic compounds, some level of pesticides, chlorine and PCBs. Most biological contaminants{Any of several fibrous mineral forms of magnesium silicate}, asbestos, fluorides, nih'ates, are not removed, Carbon filters use granular media and depend on the duration of contact time. Perhaps the biggest drawback of this system is that the inflow contains bacteria
and they tend to thrive in an . environment, adsorbed with organic contaminants. As a remedy for this, some uni,ts are impregnated with Silver Nitrate. It 'is a potential toxin all by itself. In fact, one is usually unaware, when the Activated Carbon is exhausted and therefore do not replace it frequently. Some manufacturers have developed a system that carries a catridge and has an expiry date. The filter should be used with other technologies such as KDF which can render the water bacteriostatic i.e. not allowing bacteria to coll~ct. Thus the life of Ceramic Filters can be extended over 2 to 3 times.
Ceramic Filters (CF)
They use a special porous ceramic material to provide a durable, ultrafine, filteration medium. CF's therefore remove bacteria, cysts, fibres, algae and sediment. They can be brushed, cleaned and used several times. CF's do not remove metals, nitrates, and chiorine and can be used where water is not heavily contaminated.
Distillation
It is an age-old process, that extracts unwanted impurities commonly known to everyone and handed down from Grandmother's times of basically boiling and. cooling. It involves another step i.e. evaporation and condensation to liquid state. The problem here is that any liquid / volatiles with a boiling point lower than water, will remain and recontaminate it. VOC's and other contaminants therefore may remain, but salts, minerals will be removed.
The most effective way to distillation is to preceed it with carbon filter and KDF.on Exchange Systems can be called "Water softners" too. Technology is use of a bed of electrically charged resin designed to hold sodium ions in suspension. Calcium (Ca++) and Magnesium (Mg++) ions are replaced with Sodium (or potassium). The nisin bed ultimately gets contaminated and must be recharged by washing it with Brine to release Ca++ and Mg++ ions.
New generation softners combine with flow meters and timers to recharge, only when a predetermin,ed amount of water has been used. They are called Demand Initiated Regeneration Systems (DIRS). In extremely hard water areas, these units pay for themselves very quickly. They save you a lot of money in cleaning and prolonging{To lengthen in duration}life of household products and appliances.
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