At the residence I'm constructing a kitchen digester. The gas is to be collected into an old bicycle/scooter tube - initially as empty as may be after wringing it out..
Will the digester (total volume 50Litres, I plan to use no more than 2/3 of the total volume) i.e. about 7.5L gas at any time - be able to fill the tube against atmospheric pressure? Is it correct to assume the gas in the tube will be at 1 atm. pressure?
EDIT: The photograph of the link shown is a very similar system; the digester I'm looking to construct is larger in volume (50L as against 1Gallon in the figure), and collects the gas over water.