Ha! We're just starting up some batch tests to quantify uptake of N, P, and K from urine.......
I'll make sure the results of these studies are accessible to the list. Josh On Thu, Nov 8, 2012 at 6:03 PM, Paul Olivier <[email protected]> wrote: > Josh, > > I really like what you say here. > The big challenge here is in examining the role of biochar in sorbing N > from human urine. > Many thanks. > Paul > > > On Fri, Nov 9, 2012 at 7:26 AM, Josh Kearns > <[email protected]>wrote: > >> Hi Crispin (et al.) - >> >> We're just beginning to look at biochars in taste and odor control >> applications. For instance my colleague found that forced draft 1-gal >> "Toucan" TLUD chars are fairly effective for removing chlorine taste. (He >> observed in villages in Peru that people would drink water known to be >> contaminated rather than chlorinated water because of the taste, to which >> they are not desensitized like we are in the US.) >> >> We have an upcoming column study to look at removal of other common T&O >> compounds, mainly MIB I think will turn out to be our focus compound as >> it's difficult to sorb and is detectable by smell/taste as low as 10 ng/L >> (!). >> >> Just hypothesizing at this point, but the trend seems to be that high >> temperature, high-draft TLUD chars perform by far the best in most of our >> applications of interest. Ballpark....about half as good as commercial >> bituminous activated carbon. They also do not leach native organic matter >> into water, which is nice (in contrast to low temperature chars that will >> undergo some initial leaching). >> >> So I woud encourage you to try a good high-draft TLUD char in your >> boiling water - it might make a noticeable difference. Sorption kinetics >> are sped up by elevated temperature, so that may help as well (?). But I >> have not directly experimented with this myself. >> >> Josh >> >> >> >> On Thu, Nov 8, 2012 at 4:56 PM, Crispin Pemberton-Pigott < >> [email protected]> wrote: >> >>> Dear Josh (is he subscribed?)**** >>> >>> ** ** >>> >>> Great article. Having gone to Africa in 1977 to build rural water supply >>> systems I appreciate the usefulness of the system you have created. I have >>> on question you might be able to answer.**** >>> >>> ** ** >>> >>> If I boil water in a container that has some char in it, will it help in >>> any manner? Is it worth putting some into the container?**** >>> >>> ** ** >>> >>> I was wondering if the processing temperature might have to be above a >>> certain value to get a taste-free result. Ideas? Experiences?**** >>> >>> ** ** >>> >>> Thanks >>> Crispin**** >>> >>> ** ** >>> >>> ** ** >>> >>> ** ** >>> >>> FYI we had an article published last month on using TLUD and other chars >>> for water treatment in developing communities:**** >>> >>> ** ** >>> >>> http://www.wcponline.com/pdf/October2012Kearns.pdf**** >>> >>> ** ** >>> >>> feel free to share!**** >>> >>> ** ** >>> >>> Josh**** >>> >>> >>> **** >>> >>> ** ** >>> >>> -- >>> Josh Kearns >>> PhD Candidate >>> Environmental Engineering >>> Engineering for Developing Communities >>> University of Colorado-Boulder**** >>> >>> Director of Science**** >>> >>> Aqueous Solutions **** >>> >>> www.aqsolutions.org**** >>> >>> ** ** >>> >>> Mobile: 720 989 3959 >>> Skype: joshkearns >>> >>> >>> **** >>> >>> ** ** >>> >>> ** ** >>> >>> _______________________________________________ >>> Stoves mailing list >>> >>> to Send a Message to the list, use the email address >>> [email protected] >>> >>> 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://www.bioenergylists.org/ >>> >>> >>> >> >> >> -- >> Josh Kearns >> PhD Candidate >> Environmental Engineering >> Engineering for Developing Communities >> University of Colorado-Boulder >> >> Director of Science >> Aqueous Solutions >> www.aqsolutions.org >> >> Mobile: 720 989 3959 >> Skype: joshkearns >> >> >> >> >> >> _______________________________________________ >> Stoves mailing list >> >> to Send a Message to the list, use the email address >> [email protected] >> >> 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://www.bioenergylists.org/ >> >> >> > > > -- > Paul A. Olivier PhD > 27C Pham Hong Thai Street > Dalat > Vietnam > > Louisiana telephone: 1-337-447-4124 (rings Vietnam) > Mobile: 090-694-1573 (in Vietnam) > Skype address: Xpolivier > http://www.esrla.com/ > > _______________________________________________ > Stoves mailing list > > to Send a Message to the list, use the email address > [email protected] > > 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://www.bioenergylists.org/ > > > -- Josh Kearns PhD Candidate Environmental Engineering Engineering for Developing Communities University of Colorado-Boulder Director of Science Aqueous Solutions www.aqsolutions.org Mobile: 720 989 3959 Skype: joshkearns
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