Which statement describes a Solid Treatment System for flocculants?

Which statement describes a Solid Treatment System for flocculants?

• A. An open pond where flocculant is sprayed on the surface.
• B. A liquid treatment system using a treatment chamber.
• C. Runoff dissolves the soil flocculant 'block'.
• D. A system that uses a retention basin for filtration.

Answer: (C)

Solid Treatment System relies on a flocculant in solid form that is placed in the flow path and dissolves as runoff passes over it, releasing the chemical to help bind sediments. That dissolution in response to runoff is what makes it a solid treatment approach—the solid block acts as a controlled-release source of flocculant, providing treatment in situ as water moves through the site. This matches the description where runoff dissolves the soil flocculant block. The other options depict liquid-based methods or physical filtration: spraying a liquid flocculant on an open surface describes a different delivery method using liquid, not a solid block; a liquid treatment chamber outlines a centralized, liquid-only treatment process; and a retention basin for filtration describes a physical separation approach rather than chemical dissolution of a solid treatment, which is not how solid flocculant systems operate.

Solid Treatment System relies on a flocculant in solid form that is placed in the flow path and dissolves as runoff passes over it, releasing the chemical to help bind sediments. That dissolution in response to runoff is what makes it a solid treatment approach—the solid block acts as a controlled-release source of flocculant, providing treatment in situ as water moves through the site.

This matches the description where runoff dissolves the soil flocculant block. The other options depict liquid-based methods or physical filtration: spraying a liquid flocculant on an open surface describes a different delivery method using liquid, not a solid block; a liquid treatment chamber outlines a centralized, liquid-only treatment process; and a retention basin for filtration describes a physical separation approach rather than chemical dissolution of a solid treatment, which is not how solid flocculant systems operate.