[Stoves] Water Disinfection - Mix Boiling Water and Unheated Water to Pasteurize

[nari phaltan]

A very simple and cost effective water cleaning system has been developed
by us. Stovers might like to have a look. https://nariphaltan.org/swp.pdf

Cheers.

Anil Rajvanshi

Nimbkar Agricultural Research Institute (NARI)
Tambmal, Phaltan-Lonand Road
P.O.Box 44
Phaltan-415523, Maharashtra, India
Ph:+91-9168937964
e-mail:nariphaltan at gmail.com
           nariphaltan at nariphaltan.org

https://www.nariphaltan.org

https://nariphaltan.org/narisouvenir.pdf (Fifty Years of NARI)



On Sun, Sep 22, 2019 at 4:08 AM Crispin Pemberton-Pigott <
crispinpigott at outlook.com> wrote:

> Dear Kevin
>
> I like the idea, but the temperature will not be high enough for long
> enough, or both at 70. Here is a time and temperature chart to guide you
> (attached).
>
> You can see the idea of flash pasteurization is valid, but not at 70 C.
>
> If you assume you can attain at least one second with good mixing, you'll
> need 90 C to start.
>
> It looks as if you should monitor the temperature carefully and see how
> long it takes to get it well mixed, and how rapidly the temperature drops.
>
> Then plan how much you can mix, and how it is to be stirred. The higher
> the temperature the more rapidly it will cool. It is fair to assume the lid
> will be off because of the stirring.
>
> This site has what saw would call practical advice
>
>
> https://www.offgridweb.com/preparation/survival-science-minimum-water-boiling-time/
>
> Neither reference mentions that spores of several diseases are not killed
> at 100 C including anthrax, tetanus, gangrene and botulism.
>
> Maybe boiling is not such a bad idea.
>
> Best wishes
> Crispin
> *From:* info at sun24.solar
> *Sent:* September 21, 2019 3:42 PM
> *To:* stoves at lists.bioenergylists.org; dandreatta at sealimited.com;
> rongretlarson at comcast.net
> *Reply to:* stoves at lists.bioenergylists.org
> *Subject:* [Stoves] Water Disinfection - Mix Boiling Water and Unheated
> Water to Pasteurize
>
> Listmates,
>
> Dale, Ron and I have found a simple way to improve by a third the
> efficiency of boiling water for disinfection.
>
> As you probably know, water is flash pasteurized at 71C.  However, most
> people boil (100C) their water because boiling is their only mark.  Without
> indicators such as a thermometer or WAPI, people don't know when their
> water reaches 70C.
>
> Our testing indicates pasteurization is probably attained by boiling two
> parts boiling water and adding one part unheated water.  The mixture should
> have a temperature that flash pasteurizes the water.
>
> With one billion people boiling water, the benefits of increasing
> efficiency by a third are obvious with savings of time, money, fuel and
> emissions.
>
> Here are my test results
> <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1OYMUmC6giV-G_CBstBh8ivBn1n_lxHJ0X_sMiR6lLmU%2Fedit%3Fusp%3Dsharing&data=02%7C01%7C%7Cddef897627a041d9954408d73ecbe202%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637046917695695479&sdata=pF%2FgTosWrfSSgcIHBx2Yyg6alBdeMemMTAQjRsgNYSk%3D&reserved=0>.
> Dale's time/temperature testing indicates that a 1:1 mixture (boiling water
> to unheated water) may be insufficient for pasteurization.
>
> We need testing for live pathogens.  Can you recommend someone to test
> this method with water contaminated with pathogens?
>
> Thank you,
> Kevin
>
> *Kevin McLean, President*
> *Sun24*
>
> *https://sun24.solar
> <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsun24.solar&data=02%7C01%7C%7Cddef897627a041d9954408d73ecbe202%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637046917695705490&sdata=BtUxmAzJrwp3BrJvDGrarEEpZTikHrgtaShOfGEBTYc%3D&reserved=0>
> Sun24 Cookstoves Overview
> <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1ZryS7gQ1q3zKLZPM2KcXdtIHbOYQp4PbloPqMvrlZ5Y%2Fedit%3Fusp%3Dsharing&data=02%7C01%7C%7Cddef897627a041d9954408d73ecbe202%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637046917695715495&sdata=N%2FLwTVfrWLzGfVIT3onQt8q2g%2BwK1IqS9Quc08K6EUQ%3D&reserved=0>
> *
> *Tampa, Florida, USA*
> *+1 (813) 505-3340 <+1(813)5053340>*
>
>
>
>
>
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
>
> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://stoves.bioenergylists.org/
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20190922/d6d926d1/attachment.html>