What function do comminutors perform?

What function do comminutors perform?

• A. Breaking down solid large objects in the sewer system
• B. Removing oil and grease
• C. Filtering bacteria
• D. Disinfecting water

Answer: (A)

Comminutors are mechanical grinders placed in the sewer line to reduce the size of solids. Their job is to break down solid large objects so they can pass through pumps, pipes, and screens without causing jams or damaging equipment. By turning big, hard-to-move items into smaller pieces, they help prevent blockages in lift stations and downstream infrastructure and make solids easier to manage at the treatment plant.

Oil and grease removal is handled by grease interceptors or traps, not by grinders. Filtering bacteria is part of the treatment process that removes or reduces microbial content, not a grinding task. Disinfecting water is a separate step that uses chemicals or UV light to kill microbes, not mechanical size reduction.