Project Overview
The 40 MLD Tertiary Sewage Treatment Plant (TSTP) in Surat demonstrates Enviro’s pioneering role in municipal wastewater reuse. Delivered under an EPC + O&M contract for the Surat Municipal Corporation, the plant produces industrial-grade product water for the Pandesara Industrial Estate.
The facility treats 61 MLD of sewage from an upstream SBR plant. Disc filters reduce TSS to 5 mg/L, after which UF-RO membrane systems further polish the effluent to generate 40 MLD of high-quality recycled water suitable for industrial use.
This project combines operational excellence and advanced technology integration to ensure consistent water quality, sustainability, and revenue generation for the municipality.
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Project Objectives
1.Generate guaranteed revenue for the municipality through sale of industrial-grade water.
2.Reduce environmental impact by promoting large-scale wastewater reuse.
3.Contribute to energy-efficient, decarbonised water treatment practices.
4.Support industrial growth in Pandesara while conserving freshwater for domestic use.
The Challenge
!Meeting industrial-grade water quality standards reliably from variable municipal sewage inflow.
!Ensuring stable 24×7 operation to supply water continuously to industrial consumers.
!Aligning advanced membrane systems with existing upstream treatment infrastructure.
The Solution
Enviro designed a tiered treatment process to ensure performance and quality:
✓Disc Filtration to polish secondary-treated sewage and reduce TSS.
✓Ultrafiltration (UF) + Reverse Osmosis (RO) to deliver industrial-grade product water.
✓Automation and O&M expertise ensuring consistent output under challenging feed conditions.
The Results
★40 MLD of reliable product water supplied daily to Pandesara industries.
★New municipal revenue stream from recycled wastewater.
★Reduced dependency on freshwater sources, conserving natural reserves.
★Proof of concept that reuse projects can deliver both sustainability and profitability.
Why It Matters
The Hebbal STP demonstrates how wastewater treatment can become a resource hub — producing clean water, renewable energy, and environmental benefits. As India’s first large-scale STP of its kind, it sets the stage for future-ready, self-sustaining urban utilities.
