UCA_1A-9ª_1: Day 70. Our last day in the column.

First of all, our dark column is getting darker, that means sulfate-reducing bacterias keep growing! Secondly, we have noticed that water is cleaner than las time. We think that's because there were some bacerias in it but they have died and gone down.

In the light column, the green zone is bigger because the algae keep growing too! Nevertheless, red marks are similar as las time, so it's probably that iron-reducing bacterias have died.

We lit a lightner near the top of the bottle to know if some bacerias had produced methane but the test was negative in both column.

That's all about our Winogradsky project and we hope you have enjoy with it :)

Dark column

Light column

Light column