[Digestion] heating the fermenter

[adkarve]

Dear members,
I still seek an answer to my question as to whether methnogenesis in a
biogas plant was an exenergonic reaction or not. The claim made by Mr.
Hatoum that a biogas plant with a moving dome was open at the top and
therefore not amenable to being insulated, is not acceptable to me.The top
of the fermenter is not open, but is covered by the gas holder. The gas
holder is made of moulded plastic. The plastic as well as the biogas inside
the gas holder are both poor conductors of heat. Since the fermentation
takes place inside the fermenter vessel, I feel that it would be meaningful
to insulate the fermenter vessel.
Yours
A.D.Karve
----- Original Message -----
From: Socrate Hatoum <socrate at hatoum.com>
To: adkarve <adkarve at pn2.vsnl.net.in>
Sent: Monday, October 30, 2006 4:27 PM
Subject: Re: [Digestion] heating the fermenter


Dear Dr Karve

With all due respect. your type of digester is impossible to
insulate, since it is opened at the top. due to the floating dome.
The later is functional in the tropics. But "thanks" to the global
heating the tropics are moving north...
Best regards
S. Hatoum

Le 29 oct. 06 à 02:51, adkarve a écrit :

> Dear Mr. Simon,
>
> in my starch based biogas plant, I add daily only 10 litres water
> and 1 kg starchy material to a fermenter having a volume of 1000
> litres.
>
> Is methanogenesis an exenergonic reaction? If that were so, and if
> the fermenter were insulated, there should be no need to heat the
> fermenter during winter.
>
> Yours
>
> A.D.Karve
>
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