Welcome back to TPO magazine's Exam Study Guide Series, which offers a pair of water/wastewater study questions with in-depth explanations of the answers. Last time, we covered a set of wastewater and drinking water treatment questions on the topics of Disinfection Processes and Carbon Dioxide Concentrations. This time you can test your knowledge about wet scrubber odor control and ion exchange treatment.
Wastewater Treatment Sample Question
Packed bed is the most common form of wet scrubber odor control. How is this accomplished?
A. Hypochlorite adsorption
B. Electrolytic chemical scrubber
C. Chemical absorption
D. Biological oxidation
Water Treatment Sample Question
How does ion exchange treatment help reduce the development of disinfectant by products?
A. Magnetically charged beads remove the chlorine residual as the water flows through the softener
B. Magnetically charged beads, fed as a slurry, allow dissolved organics to adhere and settle out
C. Magnetically charged beads remove calcium and magnesium ions as the water flows through the softener
D. Magnetically charged beads remove iron and manganese as the water flows through the softener
To see answers for both of the above questions, click this link.
About the authors: Rick 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. Lallish was also named the 2017 Illinois Operator of the Year and 2018 president of the Illinois Association of Water Pollution Control Operators.
Drew Hoelscher is the program director of drinking water operations at the Environmental Resources Training Center in Edwardsville, Illinois.
