Question

Help meee,A study was carried out on the emission of N2O in a sewage treatment plant (ETE) in the metropolitan region of Rio de Janeiro.
of January. During the study period, this ETE received sewage from 470,000 inhabitants. One particularity observed is that in addition to receiving domestic sewage, this station received, during a certain period of the day,the material leached from a sanitary landfill, responsible for causing an increase in the load of organic matter in the ETE in study. Continuous measurements of dissolved oxygen concentration and N2O emission were carried out at this station for 3
hours, in the period prior to the entry of the material leached from the landfill and in the period immediately after the entry of this material.

1-Why, soon after the material from the landfill, the concentration of dissolved oxygen decreased;

2-Why is there a significant increase in the emission of N2O soon after the entry of the leached material from the landfill? What bacterial processes can contribute to the increase in the emission of this observed gas
in this experiment?

Answer 1

The emission of N2O from the landfill site is called denitrification and it is caused by the action of denitrifying bacteria.

What is dissolved oxygen?

The term dissolved oxygen refers to the amount of oxygen that is present in  a water body. Now, we know that the addition of organic matter into water requires oxygen to break it own thus the dissolved oxygen content will go down in response to the added organic load.

The process that leads to the emission of N2O from the landfill site is called denitrification and it is caused by the action of denitrifying bacteria.

Learn more about denitrification:brainly.com/question/13624886?

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