Marialena Kafritsa University of Ioannina
 Winogradsky column

Here I present my data from Voidomatis river (23^th October 2015) . In order to manufacture my Winogradsky column I used two bottles (1,5L). Both of my columns contain pieces of paper, 1 egg with its shell and baking powder. In one bottle I had extra sulfur source by adding vitamins. I use the column without the sulfur source as control in order to observe any changes with the addition of sulfur. Both of the columns are exposed to sunlight and room temperature.

This is the procedure I used to construct my winogradsky columns:
I took mud from the river and mixed it with my nutrients and placed into 1/3 of my bottle. In one bottle I added sulfur vitamin pills. The other 2/3 had mud without nutrients. Lastly in the rest of the bottle I added river water.

Here is a photo of the sulfur added bottle (day 1)

And here are my columns after 36 days
 (Right bottle is control and left bottle is the one with the added sulfur)

The sediment in both columns seems a little darker and the river water is starting to get a little greener because of phytoplakton photosynthesis. There are no noticeable differences between the two bottles yet.