California Wastewater Treatment Operator Practice Exam

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Prepare for the California Wastewater Treatment Operator Exam. Gain knowledge through multiple-choice questions and flashcards. Understand key concepts and regulations essential for wastewater treatment operations in California.

Practice this question and more.

Which process includes a blower?

Rotating biological contactors
Activated sludge
Trickling filters
Moving bed biofilm reactors

The correct answer is: Activated sludge

Activated sludge is the only one of the four processes that utilizes a blower. A blower is used in the aeration tank to supply air for the microorganisms to consume and break down organic matter in the wastewater. Rotating Biological Contactors (A) use rotating discs or drums that the microorganisms attach to and the wastewater flows over these discs to treat. There is no need for a blower in this process. Trickling Filters (C) have wastewater trickling over a medium where the microorganisms grow. There is no need for a blower in this process. Moving Bed Biofilm Reactors (D) use submerged plastic media where the microorganisms grow. There is no need for a blower in this process.