Water Purification by Ceramic Water Filter

Present scenario in India

It is estimated that by 2020 India will be water stressed.

Ground water is major source of fresh water. 85% of population is directly dependent on it.

Majority of ground water sources are getting contaminated.

GOI has spent Rs1105 billion on providing fresh water.

3.4million people, mostly children die because of preventable water-borne diseases, More than by AIDS.

Why do we need to develop new technology

rather than developing the existing ones?

Method adopted in developed

Countries is not applicable to

Developing nations.

We cannot use centralized water

Distribution in unplanned rural

Area.

Present techniques for water purification

Slow sand-bio sand filter.

Chlorination.

Boiling.

Adding alum and other coagulant.

Adding Moringa seeds(Drum stick).

Commercial water purifier(Tata swajal/swach/HIL pure it etc).

PET bottles.

RO

Commercial water purifies available in India

Can not

completely

remove

viruses and

bacteria of

micron sizes.

•Not

affordable

for poor

people.

•High

maintenance.

TATA

SWAJAL(2004)

TATA SAWACH HINDUSTAN

LEVER

(PURE IT)

Rice husk ash

(Rice+ Cement+

Pebbles)

Processed Rice

Husk with

Impregnated nano

silver particles

Four step process

Activated

charcoal+chlorine

Carbon as

adsorbent

Carbon as

adsorbent

Carbon as

adsorbent

Pathogen remain

present

Pathogen get killed Pathogen get killed

Turbidity get

removed

Turbidity get

removed

Turbidity get

removed

Out dated product Rs 1200/-around Rs 1200/-

Solar water Disinfectant

These process is followed in many part of the world promoted by UN (United Nations).

UV radiation interfere with mechanism of microorganism and destroy cell structure of the microorganism. If temperature is greater than 50 °C, the rate of this process is increased by three times.

Basic requirement is PET bottles and Sunlight.

For each family at least 12 bottles are required.

It is difficult to dissipates this knowledge to remote corner of our country and sunlight is not available for 365 days.

Time consuming process (>7 hours).

Not suitable for bigger families.

Ceramic Water Filter (CWF)

Procedure for making CWF

Mixture of Crop residue and Clay heated at (around 700-

1000 c) produce minutes pores in the vessel.

Burning of Husk creates minute pores which act as water filter.

Husk can be of rice, wheat, barley, sawdust, etc. which are

easily available in any part of the country.

Husk Clay Water purifier is ready!

Simple design Employment

Production from local material

No electricity

Low cost

Why Ceramic Water Filter?

Why Ceramic Water Filter?

Effective at removing more than 99% of Protozoa

90-99% of bacteria Associated with diarrheal disease reduction.

Higher user acceptability & Potential for long-term use.

99.99% of turbidity get removed.

The most cost effective solution for water purification.

Appurv Gupta demonstrating ceramic water filter to one of the NGOs in Kolhapur, India.

Demonstration to NGO

Special thanks

Prof Ganesh Ramakrisnan(IIT B)

Prof P. V. Roa (BITS Pilani, Goa)

Prof Paul Sallis(New castle University, UK)

Em Prof Manny Hernandez(Illinois' University)

Prof S. Marcott (M.I.T ,Boston)

Pratham arora(PhD Student IIT B)