[Stoves] Characteristics of biochar was Re: [biochar] grassifier & cedar chip char

[Paul Anderson]

Tom and all,   (I added    Biochar listserv because it is as much or 
more their topic than it is for Stoves.)

On 2/9/2013 7:29 PM, Tom Miles wrote:
>
> Alex,
>
> I haven't seen any complete TLUD char analyses. The Glaser groups 
> seems to be making their gasification char in the Pyreg gasifier.
>

Do we have a list of what would be "complete TLUD char analyses"???   
This would probably be an un-ending list for some people.

Please see the analyses of TLUD chars in the   "All Biochars Are Not 
Created Equal"  paper of 2009 by McLaughlin et al.

And when the list gets defined. how long do we need to do the tests that 
are rather conclusively shown to be non-issues?

And want does the International Biochar Initiative and the various 
national and regional organizations think about the testing?   Are they 
even reading these Listservs?   Leadership that does not participate is 
not leadership.

Personally, I agree with Mark.   Biochar is Organic.   and let's get on 
with the real work.

Paul
>
> Paul S. Anderson, PhD  aka "Dr TLUD"
> Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
> Website:  www.drtlud.com
>
> *From:*Stoves [mailto:stoves-bounces at lists.bioenergylists.org] *On 
> Behalf Of *Alex English
> *Sent:* Saturday, February 09, 2013 4:41 PM
> *To:* Discussion of biomass cooking stoves
> *Subject:* Re: [Stoves] Characteristics of biochar was Re: [biochar] 
> grassifier & cedar chip char
>
> Crispin, Tom,
> http://www.ithaka-journal.net/certificate/european-biochar-certificate-v4.2-final2012.pdf
> This document  includes a lengthier discussion of PAHs in char, 
> including how some chars are used to bind them in soils, and that 
> current methods for testing are problematic.
>
> We have test results from chars that could be called ' wood 
> gasification' char at levels below the 4mg/kg limit for 'premium biochar'.
>
> The high PAH levels >1000mg/kg in wood gasification chars mentioned 
> below needs a further explanation of the production method. Wood 
> gasification is to vague.
>
> Are there any PAH tests results for TLUD rice hull chars?
>
> Alex
>
>
>
> On 06/02/2013 2:35 PM, Crispin Pemberton-Pigott wrote:
>
>     Dear Tom
>
>     Thanks for that:
>
>     http://www.bacatec.de/dl/Ge09_Glaser-Steiner_engl.pdf
>
>     "A further criterion for the quality of biochar is the lack of
>     contamination with both inorganic
>
>     (e.g. heavy metals) and organic contaminants (e.g. polycyclic
>     aromatic hydrocarbons (PAH),
>
>     dioxins etc.). In this study, we could only evaluate polycyclic
>     aromatic hydrocarbons (PAH,
>
>     Fig. 4). Although chars from wood gasification are within the
>     elemental composition and the
>
>     black carbon thresholds, they exhibit extremely high PAH contents
>     (Fig. 4). Therefore, they
>
>     are not suited for soil amendmentand thus, they cannot be
>     classified as biochar. Surprisingly
>
>     high PAH contents were also measured in the barbeque charcoals
>     (Fig. 4) while all other
>
>     investigated chars had low PAH contents (Fig. 4)."
>
>     Well, there's a kick in the head. Why not? Because of chemicals
>     manufactured in the process that were not there in the original
>     fuel. That may explain a lot to some experimenters.
>
>     Regards
>
>     Crispin
>
>
>
>
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