Back when Neanderthals roamed the Earth and had a mammoth for a best friend, water was but a simple substance, a simple necessity. But that's way before Antonie van Leeuwenhoek identified Giardia lamblia in his stool. Today, drinking water is not mere a process of fetching a useful and then taking it in. With the rise of more bacteria and viruses, water has never been more deadly. So we have purifying systems-and we have never been safer.

Purification is a process that eliminates undesirable contaminants. These contaminants may include chemicals, debris and foreign bodies. Basically it cleans the liquid before it becomes absolutely free of damaging contents, making it safe for human consumption.

Most water purification systems involve complex processes and makes use of advanced technological apparatuses. The simplest, sometimes, is the method of boiling. Most households use this technique, but for the more complex water purifying systems this is just one step of the way.

I'm sure you've bought bottles of H2O in convenient stores. But have you ever wondered what the difference of distilled, purified and mineral is?

Distilled drinking H2O was made possible by distillation. It is a process of separating mixtures by heating liquid until it becomes vapor. As vapor rises, cooling coils separate the contents of water according to their volatilities. All contaminants are left inside the boiling tank while low-temperature vapors proceed to volatile vents. The separated vapor will be condensed back into its liquid form. This is one of the best ways to clear liquid of unwanted substance-a process naturally employed by Mother Earth as evaporation and precipitation.

While distillation separates contaminants by letting it rise in the air, sedimentation processes the role of gravity and cleans liquid by letting contaminants suspend at the bottom. The rate of sedimentation depends on additional chemicals in the mix such as iron salts. Sometimes carbon is added to absorb unpleasant taste and color in the liquid. As a stand-alone process, sedimentation can not completely sterilize the liquid, but rather it only reduces its microbial content. Purified water is a result of several levels of sedimentation and other processes such as floculation (process that clarifies H2O).

Filtration is another common process which makes use of layers granular beds as filter, to separate solid material and other contaminants. Sometimes carbon is also added into the process.

Another type of drinking substance is mineral water. This simply contains added minerals to change how it tastes. Sometimes the additional minerals increase the substances therapeutic value.

There other purifying systems that clean out our life sustaining liquid we drink to satisfy our needs and ensure our safety. The above mentioned processes are the most heard of and basic in difficulty level.

Sometimes these steps are used altogether to ensure that the substance we drink is tasty, clean, and healthy.