[Stoves] Using TLUD and other chars for water treatment in developing communities:

Thu Nov 8 19:28:55 CST 2012

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 <yeah.yeah.right.on at gmail.com>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 <paul.olivier at esrla.com>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 <yeah.yeah.right.on at gmail.com
>> > 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 <
>>> crispinpigott at gmail.com> 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
>>>>
>>>>
>>>> ****
>>>>
>>>> ** **
>>>>
>>>> ** **
>>>>
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>>>>
>>>
>>>
>>> --
>>> 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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>>
>>
>> --
>> 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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>>
>>
>
>
> --
> 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
>
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>
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>
>

-- 
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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