Project Overview
The Hebbal sewage treatment facility in Bengaluru is one of India’s most advanced integrated wastewater treatment and energy recovery projects. Commissioned by the Bengaluru Water Supply and Sewerage Board (BWSSB), it combines sewage treatment, sludge digestion, and biogas-to-energy generation with automation and reuse systems.
The site includes:
- 250 MLD total treatment and pumping station capacity
- A 100 MLD STP based on Sequencing Batch Reactor (SBR) technology with advanced Biological Nutrient Removal (BNR)
- A 160 MLD sludge handling plant with advanced anaerobic digesters
- A 1.0 MWe biogas-based power generation system
Biogas generated from sludge digestion powers the facility, making the plant nearly energy self-sufficient. This reduces dependency on external electricity and operational costs. Modern automation systems, including SCADA (Supervisory Control and Data Acquisition), ensure real-time monitoring, operational efficiency, and reliability. Treated water after fine filtration is reused for irrigation, further extending environmental benefits.
Project Objectives
- Protect and improve natural environmental resources in the region
- Meet discharge standards prescribed by the Pollution Control Board
- Reuse treated water for irrigation, reducing demand on freshwater sources
- Integrate waste-to-energy systems for biogas-based power generation
- Advance decarbonisation in wastewater treatment and sludge management
The Challenge
- Developing India’s first large-scale STP integrating primary clarification, advanced SBR treatment, sludge digestion, and power generation in one site
- Ensuring compliance with strict discharge standards while scaling capacity
- Achieving reliable, energy-efficient operation with minimal reliance on external grid power
The Solution
Enviro delivered a state-of-the-art sewage treatment facility by combining SBR technology with BNR, advanced anaerobic sludge digestion, and energy recovery. A fully automated SCADA system was integrated to optimize processes, improve monitoring, and ensure long-term efficiency.
The Results
- 100 MLD sewage treated daily with consistent compliance to norms
- 1.0 MWe renewable energy generated onsite, reducing reliance on grid electricity
- 160 MLD of sludge treated sustainably, lowering environmental impact
- Treated water reused for irrigation, supporting sustainable agriculture
- A pioneering model for urban water management and energy recovery in India
Why It Matters
The Hebbal STP showcases how wastewater treatment can evolve into a multi-benefit system, delivering clean water, renewable energy, and operational sustainability. It stands as a benchmark project for cities across India and beyond.
