Project Overview
The Indore Sewage Treatment Plant is the world’s first and largest single-stage sewage treatment facility built on Sequencing Batch Reactor (SBR) technology with Biological Nutrient Removal (BNR). With a treatment capacity of 245 million litres per day, this landmark project represents a breakthrough in large-scale wastewater treatment.
Commissioned by the Indore Municipal Corporation, the plant was designed to prevent untreated sewage from flowing into the Kanh and Saraswati rivers. The secondary treated water is reused for non-potable applications such as gardening and landscaping, supporting urban water conservation.
Due to land acquisition challenges, the project was executed in two phases, requiring careful planning and phased implementation to ensure timely delivery.
Project Objectives
- Treat 245 MLD of sewage using SBR with BNR to comply with CPCB discharge norms.
- Prevent untreated sewage from entering the Kanh and Saraswati rivers.
- Reuse treated effluent for non-potable purposes such as gardening and landscaping.
- Deploy SCADA-based automation for real-time monitoring, operational efficiency, and data-driven decision-making.
The Challenge
- Delivering the world’s largest single-stage SBR-BNR STP at scale.
- Overcoming delays and complexities due to land acquisition disputes.
- Ensuring compliance with strict CPCB standards while maintaining project timelines.
The Solution
Enviro designed a high-capacity, single-stage SBR system integrated with BNR to ensure nutrient removal and high-quality effluent. SCADA-based automation was implemented for process optimisation and real-time monitoring. A phased execution approach allowed work to continue despite land-related constraints, ensuring progress without compromising design or quality.
The Results
- Successfully commissioned the world’s largest single-stage SBR-BNR plant with 245 MLD capacity.
- Significant reduction of untreated sewage entering the Kanh and Saraswati rivers.
- Reliable compliance with CPCB discharge standards.
- Secondary treated water reused for urban non-potable purposes, reducing demand on freshwater.
- Enhanced operational reliability through SCADA-driven automation.
Why It Matters
The Indore STP sets a global precedent for large-scale SBR-BNR treatment, showcasing India’s capability to deliver innovative, high-capacity sewage treatment solutions. It demonstrates how advanced technology, automation, and resilient project execution can achieve sustainability and regulatory compliance in rapidly growing urban centers.
