Sewage Treatment Plants (STP)

Advanced biological, chemical & membrane processes for municipal & industrial wastewater treatment and resource recovery.

STP Overview

Overview

Sewage Treatment Plants (STPs) are vital for both municipal and industrial wastewater management. By removing solids, organic pollutants, and pathogens through multi-stage processes, STPs protect waterways and human health. Modern STPs also enable water reuse and energy recovery, turning waste into valuable resources.

Treatment Process

Our multi-stage approach ensures complete purification and resource recovery.

Primary Treatment

Physical processes (screens, grit removal, primary clarifiers) remove settleable solids and reduce BOD by up to 50%, protecting downstream stages.

Secondary Treatment

Biological processes (activated sludge, MBBR, SBR) degrade organic matter. Aeration and biomass separation achieve high BOD/COD removal.

Tertiary Treatment

Advanced polishing (sand/multimedia filters, membrane filtration, UV/ozonation) eliminates residual solids, nutrients, and pathogens for safe reuse or discharge.

Technologies Used

State-of-the-art processes tailored for each application.

Activated Sludge (AS)

Aerobic bacteria consume organic pollutants in aeration tanks, followed by clarifiers to separate biomass.

Moving Bed Biofilm Reactor (MBBR)

Plastic carriers in aeration tanks support biofilm growth, offering high organic removal in a compact footprint.

Sequencing Batch Reactor (SBR)

Batch-process system combining aeration and settling in one tank, with timed fills, aeration, and decanting cycles.

Membrane Bioreactor (MBR)

Combines biological treatment with membrane filtration for ultra-clear effluent ideal for reuse.

UASB

Anaerobic digestion in upflow reactors produces biogas while treating high-strength wastewaters.

Reuse Benefits

Treated effluent as a resource.

Standards & Compliance

All our STPs are designed to meet or exceed the CPCB effluent norms (BOD ≤ 10 mg/L, TSS ≤ 10 mg/L), comply with MoEF&CC requirements, and follow relevant BIS codes for wastewater treatment and reuse.