Wastewater treatment in laundry

1. Washing water is suitable for the operation of industrial washing machine:

Fresh water will bring best efficiency bleaching for industrial washing machine, because it helps dissolve completely and promote the ability of laundry chemicals. Juices "SUIT" in the laundry:

·       Value:

-        Hardness < 4 – 5⁰dH

-        pH 7 – 7,5

-        Fe < 0,1 mg/l

-        Mangan < 0,05 mg/l

     The analysis of input quality of water in the cleaning process is very important. If water has a high hardness, the use of equipment automatic water softener should be used.

Water concentration for laundry

2. Surface tension of water:

If water has high surface tension, it would be very difficult to penetrate, penetrates in between the fibers and stains. The osmosis between the fabric and the stain is very important for it as a guide for all kinds of chemicals in solubility and dislodge dirt from the clothes. And if the surface tension of water will greatly affect the efficiency of washing by later.

The addition of these compounds in water will help reduce tension of water and increases the efficiency detergent in water. Currently, the surface compound is an integral part of the cleaning chemicals and detergents.

Wastewater in industrial washing machine

3.     Hardness:

Water is the most versatile type of solvent on earth, it can dissolve a lot of compounds. This is a special property of water that no other type of solution may be. However, water also brings some problems for the quality control of the laundry as hardness.

Water hardness can be understood as in countries with the presence of calcium and magnesium salts. The concentration of these salts are considered domestic hardness scale, has units of ppm or dH (Deutsche Harte). Water hardness in water containing 10mg 1dH CaO in 1 liter of water, 1 dH approximately 17.848 mg CaCO3 in 1 liter of water.

water hardness of softener is shown in the following table dH value:

4.    Alkaline:

Alkaline / acid in water is determined by the pH, the value calculated by the H + ion concentration in the water.

The alkaline substances are alkali metal salts, very important job because of possible detergent removes dirt off the fabric without rub, beating, using force. Soluble salts of potassium or sodium grease remover is very good, because they form emulsion oil particles and water soluble. These seeds will no longer be able to cling on clothes and will take away the entire water discharge out.

5.   Heavy metal:

Due to the versatility of the water solvent, in water that contains a lot of metal ions, including iron and manganese are two metal biggest influence on the quality of cleaning. When two ions of high concentration in water, it will cause problems such as:

- Precipitation on fabric surfaces and discolor the laundry.

- Cause damage to the fabric, affecting the durability of the fabric.

The removal of these ions can quite simply by using measures such as ventilation, water filters through the sand ...