About

• Purpose: To treat industrial effluent, which may contain heavy metals, chemicals, oils, and other hazardous pollutants that are not found in domestic sewage.
• Processes: The treatment is achieved through a combination of methods:
  • Physical: Screening and sedimentation to remove large objects and settleable solids.
  • Chemical: Coagulation, filtration, and chemical adjustments to remove dissolved substances and control pH.
  • Biological: Using microorganisms to break down organic matter and nutrients.
• Treatment stages:
  • Preliminary Treatment: Removes large debris and objects from the wastewater.
  • Primary Treatment: Settles out grit and other solids in large tanks.
  • Secondary Treatment: Uses biological processes, such as the activated sludge process, to remove organic matter.
  • Tertiary/Advanced Treatment: Polishes the water, often using disinfection (e.g., with ozone, chlorine, or UV light) to remove remaining contaminants and microbes before discharge or reuse.
• Outcome: The treated water is safe for discharge into the environment, can be reused for other industrial processes, or can be returned to the water cycle.
• Customization: The specific processes used vary depending on the type of industry and the specific contaminants present in its wastewater.