Rispri LabsENGINEERING A CIRCULAR FUTURE

SAFE DRINKING WATER / 10

Ready: level 7 to 9 of 9Already in useVillage

Iron removal plant on the hand pump.
Bring people back to the village hand pump.

People have stopped using the village hand pump because the water turns yellow and stains everything. Water is sprayed into the air so the iron turns into rust.

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YELLOW WATER, IRON AND MUDDY WATERDelivered by Rispri Labs
Yellow water, iron and muddy water
Yellow water, iron and muddy water

What it achieves

The key numbers.

800 L/h

from one plant.

250 people

get 40 litres each a day.

2.5 paise

per litre of iron-free water.

Problem and fix

The problem this solves.

  1. 01
    The problem

    People have stopped using the village hand pump because the water turns yellow and stains everything.

    How it is fixed

    Water is sprayed into the air so the iron turns into rust. Then it passes through tanks of sand and natural media that catch the rust. A backwash pipe cleans the tanks. No power and no chemicals.

How it works

Step by step.

  1. 1

    Spray

    Water from the pump is sprayed into the air, so iron turns into rust.

  2. 2

    Settle

    Rust settles in the first chamber.

  3. 3

    Filter

    Water passes through sand and natural media that catch the rest.

  4. 4

    Backwash

    A backwash pipe cleans the filter once or twice a week.

Key features

Why it works well.

800 litres an hour. One plant gives 40 litres a day each to about 250 people, at about 2.5 paise a litre.

  • No power, no chemicalsWorks on the hand pump alone.
  • No skilled operatorVillage volunteers can run it.
  • No moving partsVery little can break.
  • Handles 1 to 30 mg/L ironBrings it down to the drinking water limit.
  • Proven at scaleHundreds already installed in villages.

At a glance

The details.

OutputAbout 800 litres an hour, 10,000 litres a day
Iron handled1 to 30 mg/L
PowerNone
Running cost2 to 3 paise a litre
Indicative equipment costAbout INR 75,000 to 1.5 lakh
Ready levelLevel 7 to 9 of 9 (already in use)
ScaleVillage

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.

  • Village hand pumps
  • Submersible pump schemes
  • Schools and anganwadis

Questions

Frequently asked questions.

Is this technology proven?

Yes. It is at ready level 7 to 9 of 9, which means: already in use. 800 litres an hour. One plant gives 40 litres a day each to about 250 people, at about 2.5 paise a litre.

What does it cost to run?

About 2 to 3 paise a litre. 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.

Yellow water, iron and muddy water

Ready: level 7 of 9Large iron filter for schools and small townsA school, hostel or small town needs a lot of iron-free water every day.Ready: level 6 to 8 of 9Home iron filter, 15 litresA home or anganwadi gets yellow water from its tube well.Ready: level 9 of 9Baked clay filter for iron and muddy waterVillage water is both muddy and full of iron, and families cannot keep buying new cartridges.Problem guideYellow Water and Red StainsIron makes people give up on a safe hand pump. A simple filter fixes it for a few paise a litre.

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
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