[Digestion] Hi

[Anand Karve]

*Biogas technology revisited*

Dr.A.D.Karve

Samuchit Enviro Tech P. Ltd. Law College Road, Ekata Park Co-Op. Housing
Society, Behind Nirmitee Showroom, Erandawane, Pune 411 004 (
adkarve at gmail.com)

Abstract: In spite of new knowledge gained since the advent of the 21st
century the biogas researchers still use some of the older concepts.  The
new concepts pointed out in this article are 1) Because the biogas
producing microbes reside in the intestines of animals, they eat what the
animals eat. 2) Breeding super-methanogens can be achieved, but their use
in a biogas plant would not be practical, as it would be impossible to
maintain them. 3) All animals represent living biogas plants, and therefore
the fecal matter of animals is the effluent slurry of a biogas plant. The
biogas producing microbes are found universally in the fecal matter of
animals because they exit the animal body along with dung.  4)Even the
anaerobic microbes need oxygen for their metabolism. They extract the
chemically bound oxygen from their feedstock.  Therefore, feedstock of a
biogas plant must have oxygen in its chemical make up. The same is also
true of food eaten by animals. 5)The value called % volatile solids
actually represents the % digestibility of the concerned substance. 6)There
is no justification for laying emphasis on the C/N ratio of a feedstock. 7)
There is no justification for laying emphasis on the hydraulic retention
time of a biogas plant. It is a useless concept. 8) In a biphasic system,
the feedstock is first treated aerobically and then subjected to anaerobic
conditions. This is wrong, because most of the organic carbon, which would
have yielded methane in the anaerobic phase, gets oxidized in the aerobic
phase itself, leading to drastic reduction in the methane yield.

***
Dr. A.D. Karve

Chairman, Samuchit Enviro Tech Pvt Ltd (www.samuchit.com)

Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)

On Mon, Jun 6, 2016 at 6:44 AM, Kelvin masule <kmasule97 at gmail.com> wrote:

> Guys do u have any information about biogas?
>
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> http://www.adelaide.edu.au/biogas/
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