• • 1. Preliminary Treatment:

Removal of Large Debris: Incoming wastewater passes through screens or grates to remove large objects like sticks, rags, and plastics.

• Grit Removal: Sand, gravel, and other heavy particles settle out in a settling chamber.

• • 2. Primary Treatment:

A settling tank holds wastewater for heavier solids (sludge) to settle at the bottom, forming a layer. Operators skim off lighter materials like oil and grease from the surface.

• • 3. Secondary Treatment:

Biological Treatment: The remaining wastewater undergoes biological treatment to remove organic pollutants. This often employs methods like activated sludge, trickling filters, or other biological reactors.

Trickling Filter: During this process, we trickle wastewater over a bed of rocks or plastic media. Microbe on the media break down organic matter.

• • 4. Tertiary Treatment:

Additional Filtration: This step involves further filtration to remove fine particles and impurities. It may include sand filtration or microfiltration.

• • 5. Disinfection:

Chlorination or UV Treatment: To kill or inactivate harmful viruses remaining in the treated water.

• • 6. Sludge Treatment:

Anaerobic Digestion or Sludge Digestion: The sludge from the primary clarifier tank undergoes additional treatment. This process breaks down organic matter and yields biogas.

Dewatering: We then dewater the digested sludge to reduce its volume.

• • 7. Effluent Discharge:

Release or Reuse: They discharge the treated water (effluent) into a receiving body of water (river or ocean) or may reuse it for irrigation.

• • 8. Monitoring and Quality Control:

They conduct regular testing and analysis to ensure that the effluent meets regulatory standards for water quality.

• • 9. Oil and Grease Removal:

In this step, we employ physical processes like skimming or chemical methods. They aim to further remove any residual oil and grease from the water.

Keep in mind that these processes can differ depending on the design of the sewage treatment plant and the technology chosen by the manufacturer. Local regulations and environmental factors also play a role in shaping the treatment process.