The treating process of wastewater or sewage takes into a place known as WWTP, which is stands for Waste Water Treatment Plant. It is also referred to as Water Resource Recovery Facility(WRRF) but if you are talking in terms of domestic wastewater it is known as Sewage Treatment Plant(STP).
Wastewater Treatment is a process of use for removing the contaminants from wastewater or sewage water and automatically works using a different process to convert it wastewater into an effluent which is acceptable for the water cycle.
Wastewater treatment plant process
Any WWTP follows 8 major steps during the wastewater treatment process. WWTP major process is as follows-
- Screening and Pumpinghttp://www.sewagetreatmentplants.in/what-is-the-full-form-of-wwtp-s
- Grit Removal
- Primary Settling
- Aeration / Activated Sludge
- Secondary Settling
- Oxygen Uptake
- Sludge Treatment
WWTP steps in Detail-
Now when you aware of the steps used in treating wastewater via STP or WRRF system. We discuss each step in detail-
1- Screening and Pumping –
Wastewater first comes through screening equipment where the material like – woods piece, plastic, rags, and other non-fluid objects are removed from it. After removing Greece and other objects wastewater is pumped to the Next Step: Grit Removal
2- Grit Removal –
In Second Step, the heavy and fine material eg- sand and gravel is removed from the wastewater.
3- Primary Settling –
During this step of treatment, a large circular tank knows as clarifiers used to do some work like step 2 but in a slow process. All the material is settled in the bottom of the tank and called primary sludge. This step also includes phosphorus removal by adding chemicals into it.
4- Aeration / Activated Sludge –
This water treatment includes most of the treatment. The biological Degradation process indulges to consume pollutants by microorganisms and transformed into nitrogen, water, and cell tissue. This biological activity is happening the same as the bottom of rivers and lakes, but this process is fast than the natural way which takes years to accomplish.
5- Secondary Settling –
Secondary clarifiers allowed treated wastewater to separate from biological from aeration tank, yielding effluent is now 90% treated. The activated sludge is pumped from the bottom of clarifiers continuously and send it again to step 4.
6- Filtration –
By using micron polyester media effluent is polished. Disc Filtered material from the surface is periodically back-washed and returned to the head of the plant for treatment.
7- Disinfection –
This step assure that there is no harmful bacteria or viruses are present in treated water. Ultra disinfection is used to kills remaining bacteria to level at the discharge permit.
8- Oxygen Uptake –
In this step of WWTP, Now high quality and stabilized water are available in this process. if it is necessary to aerate to dissolved oxygen to the permitted level. The water before discharge to the river must meet the requirement set by DNR, pollutant removal is maintained at or greater than 98%.
9- Sludge Treatment –
The primary sludge is which is pumped to step three of clarifiers from the bottom of the tank. The treatment of the sludge process involves different steps. And produce minimum and organic waste.
This Blog is written and developed by Netsol Water Solutions, a leading company of wastewater treatment equipment. A top and leading Sewage Treatment Plant Manufacturer, Effluent Treatment Plant Manufacturer, Commercial RO Plant, Industrial RO Plant, and Water Filtration Plant.