Josh, Also I am curious to know which form of N is best sorbed by biochar: urea, ammonia, ammonium, nitrate ... Does N have to be in a liquid or gaseous state for the best result?
Since rice hulls are so available and cheap here in Asia, I would be delighted if you could run tests on rice hull biochar. Would this be possible? Can you access rice hulls? If so, I will send you a 150 gasifier. Imagine rice hull biochar loaded with N from human urine fed to cattle to improve feed conversion and reduce methane. http://www.lrrd.org/lrrd24/11/leng24199.htm Thanks. Paul On Fri, Nov 9, 2012 at 8:11 AM, Josh Kearns <[email protected]>wrote: > 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 > > > > > > _______________________________________________ > 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/
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