our biogas plant jan 2012
TRANSCRIPT
João local stone mason and general machine wielder.
And Vitor, the local water and sanitation expert, lending his tractor to get rid of some earth and generally check
out our endeavours.
Kira inspecting the works
And asking why we weren’t making a
pool...
Gravel laid before we poured the
platform for the tank.
Everything in the round;
The square bit is where sewage liquid is displaced to (and
forced upwards under gas pressure)
15cm wide bricks offering a bit of
insulation.
Nice work by Anton (Romania!)
Father and son – discussing where we want the pipes to come in.
Some concrete to be added around the edge of tank to avoid collapse when we
back-fill with earth
Next we build a wooden platform on which to build the
earth dome
A rope has been attached to the legs of this wooden
structure so when the concrete above has set we can pull out the legs, let the earth collapse and remove
all the earth from the hole in the square bit – hopefully leaving the dome above
intact!
Anton and Petrus do a lovely job making this perfectly symetrical dome from earth, then cover with 8mm iron to
reinforce the concrete.
Anton and Petrus (also father and son) adding the final coat of concrete to the
dome. Note pipe for gas already installed (50mm PVC, to connect to a 32mm gas
pipe later).
75mm pipe for kitchen or organic waste to coming from near the future kitchen. Gas
return to come back in same channel.