[Digestion] young scientist project

[stephen cullinan]

I have developed a mini anaerobic digester. It consists of a plastic can
about 30cm by 30cm by 90cm.I have cut a hole in the lid of the can. In this
lid I placed a mini agitator which contained a pipe leading from the top of
the inside of the plastic can to the outside transporting any gas
produced.Iplaced three of these in a plastic
box.I placed a small immersion heater into the box and filled the box with
water. However this is where I am stuck. I need some help in thinking up of
a way of trapping the gas