Activated Sludge Reactor (ASR)


Activated Sludge Reactor (ASR)

  • Apply a multi-chamber reactor unit which employs highly concentrated microorganisms
  • A highly mechanized process
  • Microorganisms play the role in degrading biodegradable organic materials
  • Usually involve surface aerators to pump oxygen into the system
  • Solid retention time generally between 3 to 5 days for biochemical oxygen demand (BOD) removal, 3 to 18 days for nitrification
  • Time taken depending on technology used
  • For example, removal of BOD in surface – aerated ponds take 1-10 days