[Gasification] HomeBiogas

hugh at austrop.org.au hugh at austrop.org.au
Wed May 4 00:19:12 CDT 2022


Hi

  we have one of the original Israeli HomeBiogas systems. Living where we 
do - we had problems
getting fresh cow shit. It was a disaster - mostly CO2.  So we emptied, 
flushed and sterilized
it and a (not so local) dairy provided 60 litres of fresh cow shit. Then 
Covid hit and our supply
of local ex-restaurant waste stopped. (we didn't produce enough 
ourselves). 2 years later (the system
having been been totally ignored), it started to inflate. Evidently the 
battle between the CO2
producers and the methanogens had finished, and to our delight the gas 
appears to be pure methane. So
we have been using this now for months for a significant amount of our 
cooking.

However - we homogenise everything.that goes in - this speeds up the 
digestion process greatly,
and means that we are not getting a residue of indigestible  material in 
the digester tank
(which was a major problem with the initial clean out).

And yes - we should be using the copious liquid fertiliser that the 
system produces - too much
else going on and not enough hands available.

Homogenising - we use a modified Kambrook Power-drive stick mixer - with 
a modified end (cut the
loops off). So long as there is little fibrous material, or any really 
hard stuff (bottle tops etc)
it is a quite amazing machine.

(also HomeBiogas have developed a toilet system that feeds the digester 
directly. Wish we had had one!)

Worth the effort.

Hugh

www.austrop.org.au


On 04.05.2022 2:22 pm, Anand Karve wrote:
> Dear all,
> I developed in 2003 the urban domestic biogas plant which works
> without dung, but uses only domestic food waste as feedstock. The
> effluent slurry of this biogas plant is watery. I applied it regularly
> to an experimental plot of garlic. It was just a feeler trial to see
> how the plants responded to the effluent. To my surprise, the plot
> receiving the slurry gave higher yield of garlic bulbs than the plot
> receiving the recommended dose of chemical fertilizers. The area of
> both the plots was equal.
> Yours Anand Karve
> 



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