IDEA – SBR (Intermittent Decant Extended Aeration – Sequencing Batch Reactor) Based Sewage Treatment Plants

The system provides for a low capital cost and low operating cost, with improved performance over competing systems.

It offers significantly improved reliability in removal of BOD/COD TSS from waste water and the settling ability of sludge that is produced in the process.

The process operates in 6 or 8 cycles in 24hrs, Aeration, Solids settlement and effluent decanting.

Design Features:

  • Single tank without any recycle return.
  • Simple Robust Design.
  • Automated PLC Operation.
  • Modular Construction.
  • The Plant can be commissioned and put to operation on 5% of incoming load of the total capacity.


  • One tank operation (SBR Reactor), no chemical dosing.
  • Reduced Capital and Operating Cost.
  • Can be retrofitted to existing systems.
  • Tanks can be modified as per site condition.
  • Plant can be fully underground / partly underground / fully above ground.

Why SBR is better ?

  • Elimination of secondary clarifier and tube settlers and recycling sludge pumps.
  • Power saving due to fully automation and Air Blowers Operates only 12 hrs. in 24 hrs.
  • Dosing of chemicals not required, Media not required.
  • Treasury system not required. (PSF, ACF, Filter Feed Pumps etc.) Unless special requirement as polishing stage.
  • Centrifuge is used for dewatering of sludge, which takes care of zero Discharge.



Process Flow Diagram