What is Effluent Treatment Plant?

January 14, 2023by newebay020

The goal of an effluent treatment plant, also known as an ETP, is to discharge clean water into the environment while protecting it from the negative effects of the effluent. ETPs are one form of waste water treatment process.

Let’s discuss effluent treatment plants in detail

Depending on the industry, industrial effluents comprise a range of different substances. Some effluents contain hazardous substances while others contain oils and grease (e.g., cyanide). Degradable organic contaminants are present in factory effluents from the food and beverage industry. Industrial waste water contains a variety of pollutants, necessitating the use of a specific treatment method called ETP. The ETP Plant processes waste water from many industrial sectors, including chemicals, medications, pharmaceuticals, refineries, dairy, ready-mix industries, and textiles, among others, using a variety of physical, chemical, biological, and membrane processes.

Advantages of ETP:

  1. To purify industrial waste so that it can be recycled and used again
  2. To decrease the amount of fresh water used in industry
  3. To protect the environment from pollution
  4. To comply with the government’s guidelines for pollution emissions and avoid facing severe penalties
  5. To cut back on water acquisition costs

Process for Treating Industrial Effluent:

Depending on the kind of effluent, different effluents require different treatments. Before effluent is released into the environment, wastewater enters the effluent or sewage treatment plant and undergoes a number of processes. The steps of the industrial effluent treatment plant process are as follows:

  1. Preliminary Treatment: Its goal is to physically separate large-sized pollutants. Consider materials like cloth, plastic, paper, and wood logs. This stage/process entails:

Screening: In waste water treatment facilities, this is the initial unit activity that takes place. A screen is a tool with consistently sized apertures used to catch big floating objects.

Sedimentation: It is a physical method of purifying water that eliminates suspended particulates from the water by employing gravity.


Grit Chamber: The wastewater that enters the grit chamber eliminates the heavy inorganic materials that have found their way into the sewers, such as metal shavings, gravel, and sand. Grit removal can help avoid pump damage and operational issues.

Clarifiers: Before biological treatment, particles deposited by sedimentation are continuously removed from the tank by mechanical means.

  1. Primary treatment: The primary goal of this treatment is to remove floating and settleable substances, including suspended solids and organic waste. Both physical and chemical techniques are employed in this treatment. It contains:

Flocculation: The physical process of flocculation does not include the neutralisation of charge. Destabilized particles are combined into substantial aggregates in order to make it simple to remove them from the water.

Coagulation: It is a procedure that involves the addition of coagulants in order to hasten the quick settling of tiny solid particles in a liquid into larger mass. It enables filtration and sedimentation for particle removal.

Neutralization: This procedure’s primary goal is to maintain a pH range of 6 to 9 in order to satisfy the needs of various ETP processing units.

Primary Clarifiers: These are used to decrease the water’s velocity so that organic solids will settle to the tank’s bottom and contain equipment for removing floating solids and oil from the surface.

  1. Secondary Treatment: The goal of secondary or biological treatment is to further process the effluent from primary treatment to remove suspended particles and remaining organics. This stage involves both biological and chemical activities.

Activated sludge process: The Activated Sludge Process uses air and a biological floc made of bacteria to clean industrial waste water.

Aerated Lagoons: An artificial aeration system is added to a treatment pond to aid in the biological oxidation of waste water.

Trickling filters: They are frequently used for the biological treatment of home sewage and industrial waste water. They are sometimes referred to as sprinkling filters.

Rotating Biological Contactor: This process involves exposing wastewater to a biological medium in order to filter out pollutants before releasing the cleaned wastewater into the environment.

  1. Advanced/tertiary treatment: The goal of tertiary treatment is to provide a final step of treatment to enhance the effluent quality to the appropriate level before it is reused, recycled, or released into the environment.

Chemical coagulation and sedimentation: After primary and secondary treatment, chemical coagulation and sedimentation are utilised to increase the removal of solids from effluent.

Filtration: To assure high-quality water, the cleared wastewater is first sent through the nearby filtration plant’s big filter blocks.

Reverse osmosis: In this method, wastewater is forced under pressure across a membrane that traps impurities on one side and lets clean water through to the other.

UV disinfection: This method is regarded as the best one for treating industrial waste water. By maintaining the water quality, it ensures that no residual disinfection is left in the water. There are no by-products of disinfection produced by it.

What Netsol can offer!

The operation and maintenance of municipal and commercial water and wastewater treatment facilities is a specialty of Netsol Water Solutions. The majority of water and wastewater treatment plants and procedures currently in use, including sewage treatment plants, reverse osmosis plants, industrial wastewater treatment plants, pumping stations, and advanced water/wastewater treatment facilities, are covered by the plans we currently operate, which treat millions of litres of water per day for both municipal and industrial sectors.

Our team of trained engineers, scientists, diverse operators, and technicians is committed to providing excellent operation and maintenance services.

For any other support, inquiries, or product purchases, call on +91-9650608473 or email at enquiry@netsolwater.com

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