Bengaluru Launches First Full-Scale Hollow Fibre Nanofiltration Recycling Plant

The Bangalore Water Supply and Sewerage Board (BWSSB) and Ceramed Engineers have inaugurated Bengaluru’s first full-scale municipal water recycling facility based on nanofiltration (HFNF) technology. The installation uses NX Filtration’s hollow fibre nanofiltration membranes to produce high-quality reuse water from treated sewage, marking a significant step toward circular water management in one of India’s fastest-growing urban regions.

The new plant treats secondary effluent from a municipal sewage treatment plant (STP) and converts it into water suitable for industrial and non-potable municipal applications, such as HVAC cooling, construction, or landscape irrigation. The system achieves a recovery of approximately 85 %, limiting the reject stream to about 15 %, which makes it one of the most efficient configurations for advanced water reuse in India.

Technology background
NX Filtration’s hollow fibre nanofiltration membranes combine the benefits of ultrafiltration and reverse osmosis in a single step. The technology effectively removes organic micropollutants, colour, hardness, PFAS, and pathogens, while allowing essential minerals to pass through. This results in a high and stable water quality with low energy consumption and without the use of pre-treatment chemicals.

Project significance
Bengaluru faces increasing water demand due to urbanisation and industrial growth, while fresh water availability remains under pressure. By introducing hollow fibre nanofiltration for municipal effluent recycling, BWSSB demonstrates a scalable and sustainable solution to close the urban water loop. The plant contributes to reduced groundwater extraction and supports India’s long-term water security and climate adaptation goals.

This project represents an important milestone in NX Filtration’s growing activities in India, where the company collaborates with local partners such as Ceramed Engineers on applications ranging from industrial wastewater reuse to municipal water recycling.

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