A New Technique to Purify River Water for Use in Rural Communities

  • varkey
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Re: A New Technique to Purify River Water for Use in Rural Communities

Thank you.
0.25 g of seed powder can be measued with a senstive balance. For practical purpose it is approximately 2 pinches.
Using slightly more than this amount is not very critical. The excess powder that does not take part in the clearing process
will remain in the filtered water. It will not affect the water quality, except a slight increase in turbidity. Use of very tightly woven cloth
(e.g.muslin, if available) can further reduce turbidity. Filter paper is found to reduce turbidity by about 35% compared to cloth.
All the best.
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  • varkey
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Re: A New Technique to Purify River Water for Use in Rural Communities

Thank you. The article is quite interesting. It is an example of the use of Indigenous Technology (IK). More work is needed
for grey water reuse / treatment.
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  • F H Mughal
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Re: A New Technique to Purify River Water for Use in Rural Communities

Dear Dr Varkey,

In Table 1, some parameters have increased after 4 hours of operation.

Sulfate has increased from 1 to 4 mg/L; chloride from 4 to 6; potassium from 1 to 5.4; sodium 18.64 to 26.87; and more importantly, copper itself has increased from 0 to 0.24 mg/L. Can you please clarify?

Attached is a WHO publication on copper in drinking water.

Regards,
F H Mughal
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F H Mughal (Mr.)
Karachi, Pakistan

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