Dosing of Chemical Products:

The dosing of chemicals in the water to promote coagulation of the particles is located in the rapid mixing zone of the treatment plant. The purpose of this coagulant or chemical product is to destabilize the particles for the formation of floc, which is the union of particles that are in suspension to increase their size and weight so that they can sediment.

The amount of coagulant to be dosed is a very important factor for the formation of the floc, it can form such a fine floc that it cannot settle or increase the turbidity of the water. For this purpose, laboratory tests are carried out in which, by means of a jar test, the optimum dosage of the chemical to be applied to the water is determined.

Aluminum sulfate

It is one of the most common aluminum salts used around the world. At a commercial level we can find two types: A and B, which vary in their manufacturing process, so that type B aluminum sulfate is usually accompanied by a greater number of impurities compared to type A. Both types can be found both in granular form as in liquid form according to the needs of the plant.

Ferric sulfate

It is one of the most common iron salts. It can be found in granular and liquid presentations. The advantage over aluminum sulfate is that it produces a much heavier floc, so it will settle considerably faster.

Polymers

Polymers are considerably large molecules that, in addition to promoting water coagulation, due to their size, manage to trap several additional particles than coagulants for better sedimentation.

Chemical products must be properly stored for use; this will guarantee to maintain a good quality of the coagulant and good conditions for the formation of the floc.

Go to Wiki