University of Thessaly
Group number: 20 (Papadopoulou Aikaterini-Papaioannou Evangelia-Anna)
Day number: 87
Incubation: Dark

Winogradsky’s Column

Hello to everyone,

              Bellow we are presenting you the development of our experinment.

·                     73^th day (2-6-16):

                                                                                    Figure 1        

                                                     

                                                                            Figure 2

·                     77^th day (6-6-16):

                                                                                   Figure 3 

                                                                       

                                                                                                              Figure 4

                                                                                                       

·                     80^th day (9-6-16):

                                 

                                                                                                                Figure 5

                                                                                                     Figure 6

                                                                             

·                     85^th day (14-6-16):

                                                                                    Figure 7                                                                     

          Figure 8

On the 73^th, the 77^th and 80^th day of the experiment small changes observed in the lower part of the water column which acquired a darker color (Fig.1, Fig.3 and Fig.5).

Finally, the 85^th day of the experiment it appears that the color of the lower part of the water column got even darker coloration (Fig.7). This coloring occured probably due to strong H₂S production, decaying organic matter and oxides of manganese or iron or even communities generated by anaerobic bacteria. Regarding the surface (Fig.8) no changes were observed in relation to previous measurements, and the precipitate was observed to have almost completely darkened.

Notably odor were relatively low in all the above measurements.

We will make a new announcement when something has changed.