Rispri LabsENGINEERING A CIRCULAR FUTURE

INDUSTRIAL WASTEWATER AND ZLD / 01

Ready: level 9 of 9Already in useFull-size plants

Carbon bed with bacteria for hard wastewater.
Pass the COD test without heaps of sludge.

Your ETP keeps failing the COD test and produces heaps of sludge. Bacteria live on activated carbon packed in a tank.

Discuss your problem See how it works
FACTORY WASTEWATER THAT FAILS COD, SMELLS OR MAKES TOO MUCH SLUDGEDelivered by Rispri Labs
Factory wastewater that fails COD, smells or makes too much sludge
Factory wastewater that fails COD, smells or makes too much sludge

What it achieves

The key numbers.

INR 8 to 10

per 1,000 litres to run.

Almost no

sludge produced.

No smell

from the reactor.

Problem and fix

The problem this solves.

  1. 01
    The problem

    Your ETP keeps failing the COD test and produces heaps of sludge.

    How it is fixed

    Bacteria live on activated carbon packed in a tank. Air is blown in at three levels. The carbon holds the pollution while the bacteria eat it, so very little sludge comes out.

How it works

Step by step.

  1. 1

    Pack

    A tank is packed with activated carbon that holds bacteria.

  2. 2

    Aerate

    Air is blown in at three levels.

  3. 3

    Hold and eat

    Carbon holds the pollution while bacteria break it down.

  4. 4

    Polish

    Treated water can go on to a membrane stage for reuse.

Key features

Why it works well.

Costs INR 8 to 10 to treat 1,000 litres. Small space, low power, no smell.

  • Low footprintFits where a large tank will not.
  • Low powerLess electricity than a standard aeration tank.
  • Minimum sludgeSaves sludge handling and disposal cost.
  • Membrane readyCan be paired with RO or UF for reuse.

At a glance

The details.

TreatsHigh COD, smell, colour
Running costINR 8 to 10 per 1,000 litres
SludgeVery little
Proven atFull scale in several industries
Ready levelLevel 9 of 9 (already in use)
ScaleFull-size plants
Used inLeather, textile, pharma, chemical

Costs are indicative and change with your water, site and plant size. We confirm them after testing a sample.

Where it is used

Who it is for.

  • Leather units
  • Textile and dyeing units
  • Pharma plants
  • Chemical plants

Questions

Frequently asked questions.

Is this technology proven?

Yes. It is at ready level 9 of 9, which means: already in use. Costs INR 8 to 10 to treat 1,000 litres. Small space, low power, no smell.

What does it cost to run?

About iNR 8 to 10 per 1,000 litres. The exact figure depends on your water and the size of the plant. We confirm it after testing a sample.

Can we try it on our own water first?

Yes. We test a sample in our NABL-accredited lab and, where it helps, run a small trial on your site before you invest in a full plant.

Do you supply and install it?

Yes. We design, supply, install and start up the system, train your staff, and our lab checks the treated water.

Factory wastewater that fails COD, smells or makes too much sludge

Ready: level 9 of 9Moving carbon bed for wastewaterSewage or factory wastewater needs cleaning with very little sludge left over.Ready: level 9 of 9Carbon bed for very strong, toxic wastewaterWastewater from pesticide, dye or chemical plants is so strong it kills the bacteria in the ETP.Ready: level 7 of 9Enzyme filter to remove foam and detergentTreated wastewater still foams because detergent is left in it.Problem guideETP Failing the COD TestIf your ETP cannot pass the COD test, adding more chemicals only adds more sludge. Here is what works instead.

THE NEXT STEP

Fix it on
your own site.

Send us a water sample or a test report. We will check it, confirm this method fits and tell you what it costs to run.

Discuss your problem
THIS SEGMENTIndustrial wastewater and ZLDALL TECHNOLOGIESAll proven technologies