What is an effluent treatment plant (ETP) ?
Effluent treatment plant is essential to purify the waste water which is come from different types of manufacturing industry like textile , dyes and chemical manufacturing industry ,pharmaceutical etc. different environment saving organization are trying to protect the environment from the harmful effect of the effluent. Different waste water has different characteristics which pollute the water.
Process flow chart of effluent treatment plant (ETP):
Following is the basic structure of effluent treatment plant-
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Effluent from different manufacturing industry
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Primary filtration
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Cooling and mixing
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Neutralization (by acid or alkali)
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Chemical co-agulation
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Settling and separation of sludge
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Pressure filtration
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Water Discharge
Now I like to give a short description about the sequence of operation in ETP
Primary filtration:
It is the first stage of effluent treatment plant, where effluent is come from weaving, dying, printing, or finishing unit. Here primary filtration is performed to remove solid waste particles.
Cooling and mixing:
In this stage, different types of effluent are mixed and cool down by the help of motor which ran a fan.
Neutralization tank:
After cooling and mixing; effluent is transferred to neutralization tank by the help of pump. Here acid or alkali is mixed to neutralize the effluent. A pH meter is placed in the neutralization tank
Co-agulant bath:
After neutralization of effluent; effluent is transferred to a co-agulant bath. Here co-agulant is added with the effluent.
Setting tank:
In here; effluent separates from the water and it found in the lower level of the tank. Effluent is like as sludge.
Pressure filter:
Here, filtration is done under pressure. A certain amount of pressure is created here.
Carbon filtration: It is an optional filter process.
Discharge to drain:
After completion of all the process, the effluent becomes purify and it becomes safe to drain to the environment. When treated water is drain to the environment it is checked by the different testing lab.