The Function of ETP in the textile industry

The name of water is life. This is an Eternal truth in the world, this is one of them. We know that huge parts of this earth are covered by water. But out of such a huge amount of water, only 2.5% is drinkable. We know that every industries needs water and every industry uses a huge amount of water. But the concern is that, the water that is used in industry is our potable water. Because if use sea salted water in big equipment in the factory, the equipment will be damaged in a few days. As a result, industrialists use drinkable water in their factories. 

The concept is that, in a few days the whole world will be in crisis of drinking water. We know that a lot of water is used in the textile industry.

You can easily understand it by looking at the below information. The information is given that about the amount of water required to make a cloth. (Kg/ per kg cloth)

1. Cotton: 250-350 kg
2. Wool: 200-300 kg
3. Nylon: 125-150 kg
4. Rayon: 125-150 kg
5. Polyester: 100-200 kg
6. Acrylic: 100-200 kg

Such a huge amount of water will be turned into industrial waste unless the water can be treated. To purification of water currently being used in various technology such as ETP.

What is ETP?

ETP is an (Effluent Treatment Plant). Effluent Treatment Plant is a process for treating the contaminated water, which is called industrial waste water. Through ETP Process Treating the industrial waste water for its reuse water or safe disposal of water to the environment. Each Industry Should Use ETP Plant.

• Influent: Untreated industrial waste water.

 • Effluent: Treated industrial waste water.

• Sludge: This is the process to Solid part separated from waste water by ETP.

There are three system of water purification in textile industries.

1. Filtration Using Membrane: There are three system of water purification by using membrane, (Reverse Osmosis, Nano filtration, Micro filtration.)

2. Chemical Treatment.

3. Biological Treatment.

Moreover, ETP has 4 levels of water purification,

The levels are below

1. Pre-Treatment or preliminary Treatment.

2. Primary Treatment

3. Secondary Treatment

4. Tertiary Treatment.

Water is purified in an ETP in the following ways

1. Initially the water is filtered.
2. Cooling and mixing
3. Neutralized with acid or alkali.
4. the Chemicals are concentrated in water
5. The oily part is separated
6. It is re-filtered and transported to the drain

Importance of ETP.

1. Keeps the balance of the environment just right
2. Makes water clean and safe and reusable
3. The best way to reduce waste material from an industrial plant
4. With proper maintenance it is possible to save money in the long run

Below are the different properties of contaminated water after use of water in dyeing industry and quality of pure water after use of ETP. The importance of ETP can be easily understood from this information. Quality of water after use in dyeing industry:

pH: 9-11

BOD: 300 milligram / liter

COD: 200 milligram / liter

SS: 200 milligram / liter

Colour : Quality of water after purification by dark brown ETP.

pH: 7-8

BOD: 30 milligram / liter

COD: 160 milligram / liter

SS: 30 milligram / liter

Colour: After using light brown i.e. ETP, it is possible to restore the water quality as before. As a result pure water can be reused.

Chemical water which is used in all factories, is freely discharged in rivers, canals, swamp, and agricultural lands. Which is completely illegal and a threat to the balance of the environment.