The Activated Sludge Process

question 23

Multiple Choice

The activated sludge process

• A) is used during secondary treatment of sewage.
• B) is meant to convert inorganic to organic matter.
• C) is meant to increase the BOD.
• D) removes large objects from the sewage.
• E) is meant to convert inorganic to organic matter AND is meant to increase the BOD.

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Definitions:

Lamina Propria

A layer of loose connective tissue found beneath the epithelium, part of the mucous membranes.

Serosa

A smooth membrane consisting of a layer of cells that secrete serous fluid, lining various cavities and organs in the body, including the abdomen.

Muscularis

The muscularis is a layer of muscle found in various organs such as the gastrointestinal tract, responsible for movement and peristalsis.

Enteric Nervous System

A part of the nervous system that directly controls the gastrointestinal system, functioning independently of the central nervous system.