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<p class=MsoNormal><span style='color:#1F497D'>Dear Paul,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>A comprehensive summary of the
state of the art – thank you. I’m afraid I didn’t receive the “interesting
paper” you attached. Please could you send a link, or the title+authour+year?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Ed<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> digestion-bounces@lists.bioenergylists.org
[mailto:digestion-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Paul
Harris<br>
<b>Sent:</b> 05 October 2010 04:10<br>
<b>To:</b> 'For Discussion of Anaerobic Digestion'<br>
<b>Subject:</b> [Digestion] More scientific based research and questions<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-AU>Sir, <br>
<br>
Greetings....<br>
<br>
I have been seeing many queries posed by many persons, I do not
understand where these persons are from, or what work is done at the feild
level, so many theories projected, I have been in this feild for 30 odd
yrs, in a normal system u use cowdung/manure as the main feed substarte, and we
have been following this very closely, any amount of manipulation does not
help, we have seen number of biogas plants fail to produce gas after
overloading..with unwanted chemicals/ biological products particularly when the
temp in fall of the year, there is not much u can do, but try save the heat
loss by insulation,which is very pratical when temp falls below 10 degrees. I
wish to share my little knowledge and experience <br>
<br>
Methane is one of final product, and its production is based on the avialbility
of Hydrogen based compounds, we have seen the addation of oil seed cake, we use
mostly cakes which are not utilised for cattle, castor cake, Jatropha, sopilt
oil seed cake, ground nut, waste cooking oil, if used in a small qty, it can
keep producing biogas of higher quality, I do not want to indulge in the
information which is known, the various process of anaerobic digestion....when
a new product is introduced, it must be introduced gradually in small
quantity,,,,, I have been using coffee husk C:N (1:23) better than cattle dung
which is approx (1:30),,,, one of the problem we face is higher production of
H2S(hydrogen sulphide) , on the other hand we have recently
seen more farmers are now using the waste water from the rubber sheet (latex is
collected, made to cogulate by adding formic acid) after 3 hrs, the cogulated
latex slab is made to pass through steel rollers, which removes the liquid
portion, which is rich in sugars and carbohydrates, they are use for feeding
the biogas plants, there is no need of dung, though initially these were solely
dung fed bioas plants....I do not have much understanding of the
microbiology...but it works, it does not cost the farmer anything, it has
become a blessing in disguise , for many years, it was a nuisance, until
someone discovered the potential of this waste water.<br>
<br>
Methane production can also be increased, by providing the methonabactera with
right amount of nutrients, these are trace elements, they need in small qty, of
which, ferrous (iron) cobalt, nickel, molybendum....these quantity needs to be
added monthly, or when the gas production (methane) falls.....from my
experience from the field, this technology has been staright jackted with the
usage of animal manure....all the while the research consideration was on C:N
...thus when higher protein products were used, or if the product is
much more than organic/ compound, system fail.... Only recently a new
line of research is taking place, looking closely on hydrogenated compounds
(C:H), that is where oil seed cake is found to be a good product, a safe
candidate for increasing Methane .....waste food have good potential, because
of more hydrogen products, like fats and oil....now waste management have adopted
this product.....<br>
<br>
Most of the installed biogas plant at family level fails for number of reason,
on of the main ones, is lack feed material and water, both are closely linked
....see this in perspective, the Indian Insitute of Science, Bangalore's rural
energy wing - Centre for science and technology have developed a a new
design called Plug Flow...it take care to over come many of the problems
associated, as the feed material is mostly biomass in their native state,
always thought that methane production take place only when biomass is
submerged in water, no it is not necessary, as as long as biomass is confined
to a close place /devoid of air methane will be generated, best example
in nature is the termite , they consume all the cellulose material, certain
type of bacteria in their guts, break the cellulose down with enzyme,
producing host material, ..........<br>
<br>
Below is an interesting paper attached.....</span><span lang=EN-AU
style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-AU>For Dhanesh Kumar [daquab4u@gmail.com]<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-AU><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-AU style='font-size:10.5pt;font-family:Consolas'>Mr.
Paul Harris, Room S116b, Waite Main Building Faculty of Sciences, The
University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064
Ph : +61 8 8303 7880
Fax : +61 8 8303 4386 <a
href="mailto:paul.harris@adelaide.edu.au">mailto:paul.harris@adelaide.edu.au</a>
<a href="http://www.adelaide.edu.au/directory/paul.harris">http://www.adelaide.edu.au/directory/paul.harris</a><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-AU style='font-size:10.5pt;font-family:Consolas'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-AU style='font-size:10.5pt;font-family:Consolas'>CRICOS
Provider Number 00123M<o:p></o:p></span></p>
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