Water filter system - which is there?

The need to additionally filter drinking water is being talked about again and again. This article reveals which options are available, which risks and disadvantages the individual options hold, and whether it makes any sense to additionally filter tap water with additional effort.

Activated carbon filtration

Activated carbon consists of a special kind of coal which is added to gases during production. Due to the addition of gas, the activated carbon forms many small and very small pores.

Uncharged substances and larger particles are deposited on the activated charcoal and are thus filtered out. Charged substances (ions and salts) remain in the water, however. Activated carbon removes especially:

  • Suspended and turbid substances
  • Particles, rust, grains of sand (these should be filtered out beforehand by a fine filter as far as possible)
  • some heavy metals
  • some bacteria in conjunction with ceramic filter elements

Disadvantages and risks

Activated carbon filter elements must always be replaced regularly. When they are full, they do not work anymore.

In addition, there is a risk of bacterial contamination in the filter. They can multiply in the filter, and then, under certain circumstances, break into the water in high and dangerous concentrations.

Reverse Osmosis System

A reverse osmosis system produces very pure water, which removes 99.9% of all impurities. Also, the water hardness is reduced to zero.

Disadvantages and risks

The very soft water can also have disadvantages. Besides, drinking osmosis water is not very healthy. It has the same disadvantages to the human body as distilled water.

UV disinfection

To make drinking water germ-free, and to kill all bacteria in the drinking water, there are systems for UV disinfection. They are considered a microbial filter system.

These plants mainly use mercury-vapor lamps that irradiate the water with UV light, killing all germs and rendering viruses inactive.

The process is simple and does not change the chemical structure or taste of the water. It therefore has no disadvantages.

Portable water filter systems

For on the way there are water filter systems for the backpack. They consist of a ceramic filter element and usually an additional activated carbon candle inside. The pore diameter is so small that even bacteria or harmful chemicals in the majority can not get through.

The filters are expensive, but offer excellent filter performance. However, the flow rate is very limited in most filters - it is about 1-5 liters per minute. They are therefore only suitable for outdoor use.

Tips & Tricks

Drinking completely pure and desalinated water is not considered very healthy. The purity of tap water in Germany is so high that you do not have to worry if you drink it unfiltered.

Video Board: How to Choose a Water Filter