Hi Friends,

Even as I launch this today ( my 80th Birthday ), I realize that there is yet so much to say and do. There is just no time to look back, no time to wonder,"Will anyone read these pages?"

With regards,
Hemen Parekh
27 June 2013

Now as I approach my 90th birthday ( 27 June 2023 ) , I invite you to visit my Digital Avatar ( www.hemenparekh.ai ) – and continue chatting with me , even when I am no more here physically

Saturday 24 March 2018

AND WATER_WARS ARE LOOMING LARGE !


Replicating   Nature  ?

------------------------


Times of India ( 17 March ) carried following news :






Union Water Resources Minister Nitin Gadkari said on Friday that the country would soon have potable water from sea at five paise per litre.

Trials for conversion of sea water into potable water have started in Tuticorin, Tamil Nadu, said the minister of River Development & Ganga Rejuvenation.



This is indeed, a very good news


Another good news in respect of making available , clean drinking water  , was reported in today’s Business Line . Read :






JanaJal water ATMs sell 250 ml of chilled water for 1,   one litre at 5   and 20 litres for 20


“We plan to use this fund to expand its footprint and operations, which Agarwal said would touch 1,000 water ATMs by the end of 2018.


“In near future, we plan to install 1,500 water ATMs at railway stations and another 1,500 at other places,” Agarwal said.


By 2020, he said, JanaJal will be supplying 1 billion litres of clean and safe drinking water, contributing its bit to keep India healthy.



MY  OBSERVATIONS :



·         On its web site , JanaJal  [  https://www.janajal.com/  ] claims :

         • Most affordable water dispensing technology (compared to water cans, pouches, bottles etc.)

• Technology based on clean energy and environment-friendly techniques such as solar energy

• Operates on solar energy & electricity

Gravel Filter for suspended particles

Silica Filter for fine TSS in water

Active Carbon Filter for odour eradication

Twin sediment filter

Dual Stage RO filtration

Online UV treatment


I suppose , all of these filtration technologies + occasional use of electricity, makes this water 100 times more expensive, as compared to what Shri Gadkariji claims .


And of course , it must depend upon raw water supply from Public Water Distribution Network ( -  which just does not exist in our lakhs of villages and in our desert / semi-arid areas )


As against this , I suppose , that Tuticorin plant would draw sea water and possibly use , Solar Energy for distillation / evaporation , thereby eliminating energy cost .

And , since this process copies the nature , there is no need for any kind of filtration


But its limitation is that , the plant has to be very close to sea ! No good for hinterland !



Now comes the BEST news !


Extracting absolutely clean water ( anywhere , including in deserts ! ) out of thin air , using Solar Energy  !


No need for electricity / filtration / water source ( sea or public water supply )  !


Earlier , I had reported this in my following blog :

Water Water Everywhere ? Even in Latur ?  [  15  April  2017  ]



To know how this technology has progressed in last one year , read :

In Field Tests, Device Harvests Water From Desert Air

 




Last year , while sending my blog , I had requested Shri Devendra Fadnavisji to contact Prof Yaghi , requesting him to make available this WATER  HARVESTING  technology




Dear Shri Gadkariji,



You are absolutely right when you say :


"Water is the biggest problem in India. Only if we manage to save water, forest and animals we would be able to go ahead. It is directly linked to our country and the society"


I urge you to contact the following members of the enlarged MIT team




·         Evelyn Wang   [  enwang@mit.edu  ]

Sameer R. Rao   [   srrao@mit.edu  ]


·         Prof Omar Yaghi   [   yaghi@berkeley.edu / oyaghi@lbl.gov  ]


You may also want to look up an equally simple / affordable alternative at :





24  March  2018





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