Our group ended up with a well- functioning biodigester, however we had some bumps along the road while making it. The first mistake I made was the step of putting special water (without chlorine) into the soda bottle using a contaminated water bottle (used with normal water). This would effect the results of the biodigester, so Davida gave us a new soda bottle filled with manure to put the special water into, using an uncontaminated beaker this time around. We then proceeded with the experiment, putting banana slices (80g) in the cow manure. Our group chose banana because they release a chemical called ethylene, which speeds of the ripening. So, we expected our biodigester to have the most  visible reaction to the gas being produced, because it is being mixed with the other chemical that is trapped without oxygen.

Towards the end of the experiment, after glueing the bottle cap and tub together, we had realized that the tub inside the water bottle was touching the water inside the soda bottle. It is supposed to be only gas that is being produced and transferred to the water bottle not water, so if water was transferred to the other bottle, our results would definitely differ from the original plan. Thus, Davida helped move the tubing out of the water, so that the natural gas being produced was not altered.

Davida set up a control experiment, which consisted of cow manure and water, just like the other experiments, with tubing that connected the two bottles, though without any food put into it. This is so that we have something to compare the other results to, and to see the differences in amount of natural gas being produced in other bottles due to the type of food each group picked.