Wastewater Treatment
Plant Process is
a process in which toxic substances in the water are transformed into harmless
materials that can then be easily removed from the water flow. Recycling water
has proven to be an efficient and successful way in creating new and reliable
supply. It is the best way to handle our vital resources.
The chief purpose of wastewater treatment plan is to reduce the threat
of water pollution and to reuse the water back into the environment which is
hygienically safe and edible.
Waste water comes from various sources:
a)
Commercial Organizations
b)
Industrial Units
c)
Residences.
The wastewater treatment plant process is as follows:
1.
Pre-Treatment:
It occurs in industries prior to discharge.
It prevents toxic chemicals and excess nutrients to be discharged in the waste
water.
2.
Primary
Treatment:
Raw wastewater is mechanically passed
through raked bar screens to eliminate plastics, debris, cans, sticks, rags
etc. There is a grit removal system which helps to eradicate small inorganic
material such as sand and gravel. Organic solids which are lighter flow into
the large tank known as primary clarifiers. Due to gravity, heavier organic
substances settle there. These settled substances named as primary sludge are
removed with floating crust and are pumped to anaerobic digesters for advanced
treatment. A flow meter continuously records the volume of water which is
entering the treatment plan.
3.
Secondary
Treatment:
The primary waste matter is then moved to
the secondary stage also called as biological stage. In this stage water is
merged with bacteria and ample supply of oxygen to metabolize organic matter in
the waste water. The fine suspended and soluble organic materials are digested
by micro-organisms removing them from wastewater. The water flows to the final
clarifiers for further removal of sludge.
There are several deviations of secondary treatment which consists of:
a.
activated sludge
b.
trickling filtration
c.
rotating biological contactors (RBC)
4. Tertiary Treatment:
This treatment is required to
eliminate dissolved and suspended materials after conventional secondary
treatment. It is required to remove
things such as colors or organic chemicals. This can be acquired using
biological, chemical or physical processes to remove the pollutants.
5. Disinfection:
Prior to the release of final
effluent, water is disinfected to reduce the disease causing microorganisms
that remain in it.
Waste water
Treatment plant process is the most significant practice that
can help to meet the domestic, industrial and environmental water demands which
are increasing day by day.
No comments:
Post a Comment