Exam Study Guide: Temperatures and Denitrification

Exam Study Guide: Temperatures and Denitrification

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When faced with a licensing exam, don't struggle with test anxiety! Use the question below and others from our Exam Study Guide series to properly study and prepare for exam questions. Take a look at this sample wastewater treatment licensing question along with an explanation of the correct answer.

Sample question:

Denitrification processes are temperature sensitive. What affect will decreasing temperatures have on the denitrification process?

A) Affects only the biochemical nitrification process
B) Decreases the denitrification process
C) Increases the denitrification process
D) Affects only nitrifying bacteria in anaerobic selectors


The denitrification process decreases with decreasing temperatures. Adjustment in MCRT might be required in colder climates to ensure adequate denitrification. Therefore, the answer is B, decreases with denitrificaiton process.

Source: WEF MOP11 20-11

About the author
Ricky Lallish is the Water Pollution Control program director at the Environmental Resources Training Center of Southern Illinois University Edwardsville. He provides training for entry level operators in the wastewater field and operators throughout the state looking to further their education.


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