Water is a renewable resource, but sometimes it needs to be treated to use it again. Water treatment is the process of turning used or dirty water into something that can be used for some other purpose. Wastewater treatment is a complicated process and can only be done effectively in a wastewater treatment plant. This treatment removes all the unwanted particles and turns them into environmentally acceptable water. For more details, visit https://ecequip.com/the-basic-processes-of-wastewater-treatment/

1. What is
Wastewater
Treatment
Plant?

2. Content
Introduction
Pre and Primary Treatment
Secondary Treatment
Nutrient Removal and Disinfection

3. Introduction
Water is a renewable resource, but sometimes it
needs to be treated to use it again. Water treatment
is the process of turning used or dirty water into
something that can be used for some other purpose.
Wastewater treatment is a complicated process and
can only be done effectively in a wastewater
treatment plant. This treatment removes all the
unwanted particles and turns them into
environmentally acceptable water.

4. Pre and Primary Treatment
Pre-treatment is the process that removes all of the easily removable particles from the
wastewater. The particles that are removed during pre-treatment include fats, oils and
greases, sand, gravel, rocks, rags, feminine hygiene products, and other larger solids that
can easily be filtered out.
In this stage, the wastewater flows through the primary clarifiers that have large tanks.
These tanks are large so that the sludge can settle, and all of the floating material like
grease and oils rise to the surface where they can be skimmed off. They have mechanical
scrapers that help to collect sludge into a hopper.

5. The secondary treatment is the stage where human waste,
food waste, soaps, and detergents are broken down and
composted using an aerobic biological process. After it is
composted, it goes through a series of filters that clean out
other small particles such as bacteria and algae. There are
different kinds of filters including trickling filters, biological
aerated filters, and many more. Trickling filters are where
the settled sewage liquor is spread onto the surface of a
deep bed made of carbonized coal, limestone chips, or
specially fabricated plastic media. The liquid is made to pass
through the purifier to filter out all the biological films such
as bacteria, protozoa, and fungi. The sand filtration removes
residual matter, and activated carbon filtration removes the
presence of toxins.
Secondary
Treatment

6. Nutrient Removal
and Disinfection
Wastewater contains some nutrients such as nitrogen and
phosphorus that are harmful in large doses. Nitrogen is removed
from the water using oxidation that converts it to nitrate and
then into nitrogen gas that is removed from the water by
releasing it into the air. Phosphorus is removed by using
chemicals such as salts of iron or aluminium. The final step in
wastewater treatment is the disinfection stage, where chlorine
or ultraviolet light is used to disinfect the water. With this last
step, the water is transformed from a contaminated liquid into
reusable water.