Reverse Osmosis

Reverse osmosis has universally proven to be the most appropriate method of cleaning water. It filters and holds everything and is perfectly natural.

Meet the ALARCO RO water purifiers


Everything you need to know about reverse osmosis filters

Suppose we have 2 solutions in two columns, 1 left and 1 right, separated by a semipermeable membrane through which only water molecules can pass. Let us also assume that the two solutions are initially at the same height (see figure above).
The left solution has a lower concentration in dissolved matter (e.g. sugar), thus it is more diluted, while the right solution has higher concentration in the same dissolved substance, thus more concentrated.

Osmosis is the natural phenomenon in which water molecules tend to pass through the diluted (left) solution to the most dense (right solution) until the two sugar concentrations (i.e. the dissolved substance) are equal to each other. The water height in the left column will therefore be reduced while at the same time the water height in the right column is increased. The difference in height is called osmotic pressure.

If a (counter) pressure is applied from the right side, then water molecules from the right solution will move to the left solution, so this phenomenon is called reverse osmosis.

If the problem in our water is chlorine, the unpleasant smell and taste, organic compounds or asbestos fibres, then a carbon filter will work perfectly (provided that the carbon is of great quality). If the water also shows a microbiological burden (e.g. coliforms, e. Coli, enterococci, etc.) then a UV sterilization light will certainly be needed. However, to deal with water that faces all categories of problems, and in particular water with many salts and/or heavy metals, a reverse osmosis filter is needed (and with a UV sterilization light in case of unsuitable microbacteria, e.g. coliforms, e. Coli, enterococci, etc.), as carbon filters do not have the ability to remove these ions. Softeners do not remove salts, but convert them as they replace calcium and magnesium ions with sodium ions. Softeners are not suitable for producing drinking water, but can be used in combination with reverse osmosis filters. When we want an overall solution for salts (scale), not only to drink water, but to protect other appliances, we place in the main flow prefilters for suspended solids and then softeners, while on the tap for potable water we install a reverse osmosis filter. In addition, water coming from softeners is not suitable for watering in particular when it contains high concentrations of sodium.

Potable water is acceptable in terms of taste (although taste limits are subjective) when TDS are between 100 and 250ppm (approximately) and pH between 6.5 and 9.5.
The patented solution recommended by the ALARCO water filters uses the unique system: AUTO QUALITY CONTROL, which offers water free from salts (scale), nitrites, nitrates, viruses, heavy metals and more generally all the problems we may encounter in it, giving it the quality & taste desired by the consumer. By means of a smart card, scale and trace elements are automatically adjusted in a natural way, giving the water the taste we want. Finally, with the help of specific sensors that measure the concentration of total dissolved solids in water, it is possible to create water quality alerts. A bypass is actually created in the membrane where a very small percentage of the water passes through at the same time from all stages before and after the membrane. This allows natural enrichment of the water from the water itself, resulting in a clean and clean outgoing water with all necessary trace elements.
In all STUDIOLIFE ALARCO reverse osmosis models, there is either an automatic or manual water quality & flavour control system. If the model does not have water quality measurement sensors, the consumer may obtain separate conductivity & TDS meters for measuring water conductivity and TDS.
Finally, let us emphasize that all models can also function as classic reverse osmosis devices by closing the bypass of the membrane. In this case, and especially when the pH of the outgoing water drops below 6.5, an enrichment cartridge consisting of natural rock and adding calcium should be inserted to enhance its taste.

Scroll to Top