hardness of water is an old method used to describe the calcium and magnesium contents in water. Reducing hardness of water deionizing water with ion exchanging method is called " water softening". It depends on exchanging calcium(CA) and magnesium(Mg) ions ,which cause to hardness, with sodium(Na) ions on the resin's surface with the help of cationic resin. By this way, with the ion exchanging method, emerging water from system will be softened. Satisfied resins are regenerated with salty water with time or debit control. And they are removed from calcium and magnesium ions. Hardness of water is a very common problem in both domestic and industrial usage. Water which is more hard than 10Fr(100mg/ltCaCO3) degree is classified as hard water.

It causes narrowing of the pipes attached to the installment with limestone attaching in a short span of time to the all kind of machines with water and surcharge of cleaning products such as soap and etc. The layers of the lime formed in the places where the hard water is used provides a backdrop for the bacteria. Negative effects on the human healthy emerge with the illness such as arteriosclerosis and kidney Stone.

The problems that the hard water causes;

Hard water causes heat abduction as forming layers of lime in steam boiler used in the industry, in the closed-loop system and in machines.Also, it causes serious malfunctions, loss of energy and financial harm in great numbers.

-In domestic use, it causues blockage and malfunction in machines and little hand tools used hot water. When heated, the calcium carbonate and magnesium carbonate seperates from the water and accumulate in heaters. In time, the device spend more energy to arrive the same warmth, and the life of it shortens.

- Because the hard water cant make foam the cleaning products such as soap and detergent, it raises the amount of consumption.

- It leaves stains on surfaces of bathtub, sink and mirror.

- The clothes washed with hard water fades and hardens in time.

- In industrial proces, especially in wiper washer switch and textile dying and washing, it affects the product quality in negative way.planning is done according to daily use and the hardness of water.

In Turkey, for the first time, we implement the solar panel system for the refinement industry.