<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thanks for insights, Tom,<div>Re training, let me know when. I am interested esp., as we are just down in Ashland, at southern end of state.</div><div>Richard Stanley</div><div><br></div><div><br><div><div>On Feb 13, 2013, at 6:18 PM, Tom Carter wrote:</div><br class="Apple-interchange-newline"><div><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:12pt"><div><span>Jeff-</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><span>Thanks for the post. Yes, it's true that pasteurization at 65C kills all pathogenic bacteria and viruses, as well as worms and cysts. I don't recommend "feeling it with your hand" however as even a 10 degree lower temperature will have a much lower effectiveness. As you note, a wax indicator developed by Dr. Robert Metcalf accurately and safely demonstrates when the water is pathogen free. We distribute them at no cost to families and instruct them on their use. Filtration through a clean cloth probably helps a little, as does letting the water settle, but is not necessary for pasteurization. Some methods that use solar UV
disinfection do require clean water and clear PET water bottles for effectiveness. They also take longer, lack an end point and have inconsistent results and for that reason we don't recommend them.</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><span>The last step is keeping safe water safe, by storing it in clean containers with small openings so that people cannot recontaminate it by dipping in with dirty containers or hands.</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><span>I'm going to give a water testing and water pasteurization workshop here in Portland in the next months if anyone is interested in being trained.</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: tahoma,new york,times,serif;
background-color: transparent; font-style: normal;"><span>Tom Carter</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; background-color: transparent; font-style: normal; font-family: tahoma,new york,times,serif;"><a href="http://us-mg4.mail.yahoo.com/neo/aguapuraparaelpueblo.org"><span>Agua Pura Para El Pueblo</span></a></div><div><br></div> <div style="font-family: tahoma, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Jeff Holiman <<a href="mailto:jeff.holiman@gmail.com">jeff.holiman@gmail.com</a>><br> <b><span style="font-weight: bold;">To:</span></b> Discussion of biomass cooking stoves <<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>> <br><b><span style="font-weight: bold;">Cc:</span></b> Tom Carter <<a href="mailto:tom@aguapuraparaelpueblo.org">tom@aguapuraparaelpueblo.org</a>> <br> <b><span style="font-weight: bold;">Sent:</span></b>
Wednesday, February 13, 2013 1:47 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Stoves] A simple water sterilization technique<br> </font> </div> <br><div id="yiv1268786541"><div>Hello,</div><div>Dr. Metcalf continues to mentor Tom Carter, Director of Aqua Pura Para El Pueblo, a group that also works internationally teaching basic water quality testing for coliforms and distributes simple pasteurization indicators made from a wax that melts at 65 C. </div>
<div>These indicators have the potential to save much fuel for those folks that are currently boiling water to ensure having reached adequate temperature for pasteurization. </div><div>Kind regards,</div><div>Jeff Holiman</div>
<div><br></div><br><div class="yiv1268786541gmail_quote">On Mon, Feb 11, 2013 at 6:16 AM, Bruce Stahlberg <span dir="ltr"><<a rel="nofollow" ymailto="mailto:bruce@affordableenergysolutions.com" target="_blank" href="mailto:bruce@affordableenergysolutions.com">bruce@affordableenergysolutions.com</a>></span> wrote:<br>
<blockquote class="yiv1268786541gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Greetings, <br><br>Bob Metcalf has been treating and testing water quality in Africa for many years and uses simple, fairly low tech methods of testing the water on site to determine if it is safe for drinking. The testing can be done on site. It is explained here: <br>
<br><a rel="nofollow" target="_blank" href="http://www.imageevent.com/bobmetcalf/watertestingpasteurizationinafrica">www.imageevent.com/bobmetcalf/watertestingpasteurizationinafrica</a> <br><br>Search words: Bob Metcalf, water pasteurization<br>
<br>
Hope this helps. <br><br>Bruce<br><br><div class="yiv1268786541gmail_quote"><div><div class="yiv1268786541h5">On Fri, Feb 8, 2013 at 6:20 PM, nari phaltan <span dir="ltr"><<a rel="nofollow" ymailto="mailto:nariphaltan@gmail.com" target="_blank" href="mailto:nariphaltan@gmail.com">nariphaltan@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="yiv1268786541gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div class="yiv1268786541h5"><font color="#000066"><font size="4"><font face="verdana,sans-serif">Hello stovers,</font></font></font><div>
<font color="#000066"><font size="4"><font face="verdana,sans-serif"><br>
</font></font></font></div><div><font color="#000066"><font size="4"><font face="verdana,sans-serif">One of the major problems of rural areas is unavailability of clean drinking water. A simple method of filtration and heating it to 55-60 degrees Celsius can remove all bacteria. The paper is at; <a rel="nofollow" target="_blank" href="http://www.currentscience.ac.in/php/forthcoming/RC494.pdf">http://www.currentscience.ac.in/php/forthcoming/RC494.pdf</a></font></font></font></div>
<div><font color="#000066"><font size="4"><font face="verdana,sans-serif"><br></font></font></font></div><div><font color="#000066"><font size="4"><font face="verdana,sans-serif">And the news item is at; <a rel="nofollow" target="_blank" href="http://www.firstpost.com/fwire/sari-sun-combo-can-sterilise-dirty-water-619304.html?utm_source=fwire&utm_medium=hp">http://www.firstpost.com/fwire/sari-sun-combo-can-sterilise-dirty-water-619304.html?utm_source=fwire&utm_medium=hp</a></font></font></font></div>
<div><font color="#000066"><font size="4"><font face="verdana,sans-serif"><br></font></font></font></div><div><font color="#000066" face="verdana, sans-serif" size="4">Cheers.</font></div><div><font color="#000066" face="verdana, sans-serif" size="4"><br>
</font></div><div><font color="#000066" face="verdana, sans-serif" size="4">Anil</font></div><span><font color="#888888"><div><font color="#000066"><font size="4"><font face="verdana,sans-serif"><br></font></font></font></div>
<div><font color="#000066"><font size="4"><font face="verdana,sans-serif"><br clear="all">
</font></font></font><div><br></div></div></font></span></div></div></blockquote></div></blockquote></div>
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