Volos_Group 10_Day 20_Dark
Hello! The 20th day of our sample we did not observe significant changes. The odor became more noticeable due to the presence of hydrogen sulphide (H
2S). The lower part of the sediment became darker because of the precence of organic matter in the Winogradsky column. The color of the upper layer in the sample is lighter than the previous days.
More information will be posted when other changes occur!