After testing out the different metals and their effects on the rate of the generation of electricity with the E. coli (K-12) strain, we started collecting data.
The data for the Zinc electrodes are as shown below:
Fig. 17
Fig. 18
After looking through the data collected, we found that there was a very big fluctuation in the electricity generated (refer to fig. 17). Upon closer research, we found out that zinc was not a good conductor of electricity, thus we had to scrap the idea of having zinc as one of the test metals.
We decided to change the second metal to Aluminium as it is a good conductor of electricity, and it proved to be even better than Copper (refer to following post).
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