Bangladesh’s textile sector is piloting a modular wastewater recycling system paired with a novel consumer-backed financing model, as the country seeks to curb industrial water pollution while maintaining its position as one of the world’s largest garment exporters.
The initiative combines on-site water treatment technology with a funding mechanism inspired by carbon credit markets. Industry stakeholders say the approach could offer a scalable pathway for factories facing rising regulatory scrutiny and buyer pressure over environmental performance.
The pilot is led by Solidaridad Network Asia and QStone Capital, with funding from the Sustainable Manufacturing and Environmental Pollution (SMEP) programme.
At the center of the trial is a 5 cubic metre-per-hour modular wastewater treatment plant installed at Zaber & Zubair Fabrics, a vertically integrated textile mill in Dhaka.
Designed by Lenntech Water Solutions and installed by Kingsley Engineering Services, the plant uses a three-stage treatment process. The system includes ultrafiltration, dual reverse osmosis and advanced oxidation to treat effluent generated from textile dyeing and finishing.
According to SMEP, the modular system can recycle up to 85% of textile wastewater.
Water recycling is a critical issue for Bangladesh’s textile industry, which is heavily reliant on water-intensive dyeing and washing processes. Effluent discharge from factories has long been identified as a major contributor to river pollution around industrial clusters.
During a technical webinar held in February, project engineers presented initial performance data to manufacturers and sector stakeholders.
Rajib, a technical representative from Kingsley Engineering Services, said that while recycling water itself is technically feasible, the primary challenge lies in managing concentrated residual wastewater, commonly referred to as brine.
Brine is produced as a by-product of reverse osmosis systems and contains high levels of salts and chemicals. Effective handling of this concentrate is essential for achieving zero liquid discharge standards.
The pilot has been adapted for different textile processes. Solutions are being tailored for neat dyeing, open dyeing, denim washing and sweater washing operations, each of which produces wastewater with distinct chemical profiles.
Operational costs for recycling approximately 70% of water while managing the remaining 30% brine are estimated between $0.12 and $0.30 per cubic metre of recycled water.
Capital expenditure for scaling up to a 100 cubic metre per hour facility is projected at between $900,000 and $2 million, depending on site-specific conditions.
Also read: Viridis Pilot Cleans Textile Wastewater in Bangladesh
Following successful initial trials at Zaber & Zubair Fabrics, the mobile pilot unit is scheduled to move to a denim washing facility operated by Designer Fashion, part of the Bengal Group.
Data collected from both sites will be compiled into a technical report evaluating system performance across varying wastewater compositions.
Alongside the technical component, the project introduces an alternative financing structure aimed at overcoming one of the biggest barriers to adoption: upfront capital cost.
QStone Capital has proposed a model that adapts elements of voluntary carbon markets to water usage and pollution reduction.
The framework is built on two pillars.
The first is a voluntary 1% surcharge at retail checkout for garments produced using verified water-efficient processes. Consumers would opt in at the point of sale, similar to choosing to purchase a shopping bag.
The second is the issuance of blockchain-based digital certificates, referred to as water credits or tokens, to verify pollution reduction at the factory level.
According to QStone Capital CEO Jeroen Tielman, the 1% surcharge would be collected directly from retail buyers and managed through an independent foundation or fund.
The proceeds would then subsidise factories investing in advanced wastewater treatment and zero liquid discharge systems.
Tielman said the structure is designed to create a transparent link between consumers and production sites without altering existing commercial relationships between brands and manufacturers.
QStone estimates that such a mechanism could generate up to $700 million per year in Bangladesh alone, if adopted widely across export markets.
Industry observers note that global apparel brands are under increasing pressure to demonstrate environmental responsibility, particularly regarding water stewardship in supply chains concentrated in South Asia.
Regulatory tightening, investor scrutiny and evolving due diligence requirements in Europe and North America are reshaping sourcing decisions.
For Bangladeshi manufacturers, the ability to demonstrate measurable water recycling and pollution reduction could become a competitive differentiator.
The next phase of the SMEP-supported pilot aims to achieve full zero liquid discharge without relying on energy-intensive evaporation systems.
Engineers are targeting further cost reductions while improving environmental performance.
Results from the ongoing denim washing trials are expected within a month.
If the pilot proves technically and financially viable, stakeholders say it could provide a replicable blueprint for scaling water recycling solutions across Bangladesh’s textile industry.
Such a model would address environmental risk while reinforcing the country’s role in a global apparel market increasingly defined by sustainability metrics.
