Ontario Operator-in-Training (OIT) Practice Exam

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Study for the Ontario Operator-in-Training Exam. Review flashcards and multiple choice questions, each with hints and explanations. Prepare for your certification!

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What essential role does phosphorous play in wastewater treatment?

It reduces organic matter
It is necessary for biological processes
It acts as a coagulant
It removes contaminants from water

The correct answer is: It is necessary for biological processes

Phosphorus plays a crucial role in wastewater treatment primarily because it is necessary for biological processes, particularly in the growth of microorganisms used in the treatment process. In biological treatment systems, such as activated sludge processes, bacteria and other microorganisms rely on phosphorus as a vital nutrient for their metabolic functions, including DNA synthesis, energy transfer through ATP (adenosine triphosphate), and membrane formation. The presence of phosphorus supports the proliferation of microbial populations that break down organic matter and pollutants in the wastewater, ultimately leading to more effective treatment and cleaner effluent. Therefore, understanding the role of phosphorus in supporting these biological activities is critical for operators managing wastewater treatment facilities.