What equipment removes large objects from wastewater, like trash and sticks?

• A. Fine screens
• B. Grit chambers
• C. Bar screens
• D. Sludge tanks

Answer: (C)

In wastewater treatment, the first step is to remove large debris to protect pumps and downstream equipment. Bar screens are designed for this job: they are a set of wide, spaced bars that catch big objects—trash, sticks, plastic, etc.—while letting the liquid flow through. This interception prevents clogs and damage further along the treatment line.

Fine screens, by contrast, have much tighter openings and catch smaller debris, which isn’t the primary concern when removing large objects. Grit chambers separate heavy inorganic particles like sand and gravel, not large trash. Sludge tanks handle settled solids after initial treatment, not the removal of large debris from the incoming flow.

So removing large objects at the intake is best accomplished with bar screens, making them the correct choice.