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Inside Our Water Loop: How We Recycle 70% On-Site
Sustainability

Inside Our Water Loop: How We Recycle 70% On-Site

Treatment, rainwater harvesting and zero hazardous discharge. The system behind the numbers.

Inside Our Water Loop
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Textile manufacturing is thirsty work. Dyeing, washing and finishing all use water, and in Pakistan, where groundwater levels are falling, how a factory manages that water is no longer a side issue. It's part of the product.

Here's how the water system on our site works, from the moment water comes in to the moment it's either reused or released.

Why water matters in garment production

Most of the water in a textile facility goes into wet processing: pre-treatment, dyeing, rinsing and finishing. Each of those steps leaves behind water carrying dyes, salts, auxiliaries and fibers. Untreated, that water damages rivers and farmland downstream. Treated well, much of it can be used again.

Stage 1: Collection and screening

Process water from every wet line is collected in a single equalisation tank rather than released straight away. Mixing streams from different processes evens out the temperature, pH and chemical load, which makes treatment far more stable. Coarse screens remove lint, fibers and solids before the water moves on.

Stage 2: Physical and chemical treatment

Next, coagulants and flocculants are added to bind suspended particles and colour into larger clumps that settle out as sludge. The sludge is dewatered and sent for safe disposal, not dumped.

Stage 3: Biological treatment

The clarified water flows into aeration tanks, where bacteria break down the remaining organic load. This is the stage that does the most to lower COD and BOD, the two measures that tell you how much oxygen the water would steal from a river.

Stage 4: Filtration and reuse

Finally, the water passes through sand and carbon filtration and, for the share being reused in production, membrane filtration. Recycled water goes back into rinsing, washing and utility uses. Around 70% of our process water is recycled this way and returned to the line.

“Every litre we recycle is a litre we don't have to pull out of the ground.”

Rainwater harvesting

Sialkot gets heavy monsoon rain for a few months a year. Instead of letting it run off, we collect rainwater from roof areas into storage, where it tops up the recycled supply and reduces how much fresh groundwater we draw.

Zero hazardous discharge

Recycling only works if the inputs are clean to begin with. We screen dyes and chemicals against restricted substance lists before they're approved for use, so hazardous substances don't enter the water in the first place. Any water that is released is tested against discharge limits before it leaves the site.

What this means for your order

  • Your garments are dyed and finished in a closed, monitored water system.
  • Chemical inputs are screened before they reach production.
  • Water testing records are available to support your sustainability reporting.
Key takeaways
  1. Process water from every wet line is equalised, screened and treated before reuse or release.
  2. Biological treatment does most of the work of lowering COD and BOD.
  3. Around 70% of process water is filtered and returned to production.
  4. Clean chemistry comes first. Screening inputs is what makes zero hazardous discharge possible.
07

FAQ

Does recycled water affect colour quality?

No. Water used for dyeing is filtered to the standard the process needs, and every lot is checked for shade against the approved lab dip.

Can you share water test data for our reporting?

Yes. We can share treatment and discharge test records to support your supplier audits and sustainability reports.

Where does the treatment sludge go?

It's dewatered on site and handed to an approved waste handler for safe disposal.

Is rainwater used directly in dyeing?

Harvested rainwater joins the treated supply and is filtered before use, so it meets the same standard as the rest of the recycled water.

Water recycling, Effluent treatment, Sustainability, Wet processing, ZDHC
WR
Weave Room Sustainability

Our environment and compliance team runs water treatment, energy and chemical management on site in Sialkot, and supports clients with audit and reporting data.

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