Which feed system reduces handling problems with powdered activated carbon?

Which feed system reduces handling problems with powdered activated carbon?

• A. Dry gravimetric feeders
• B. Slurry feed system
• C. Volumetric feeders
• D. Helix-type feeders

Answer: (B)

Feeding powdered activated carbon as a slurry in water reduces dust, clumping, and flow problems, making handling easier and feeding more consistent. PAC is a very fine, fine powder, so when it’s fed dry it tends to create dust clouds, bridge in hoppers, and vary in bulk density, leading to inconsistent dosing and more wear on feeders. Turning the PAC into a slurry provides a liquid-like medium that can be pumped or metered more reliably, keeps the carbon suspended for uniform delivery, and minimizes operator exposure to dust. The other methods rely on dry powder feeding, which is more prone to dust generation, caking, bridging, and density-related dosing variability, making slurry the better choice for reducing handling problems.

Feeding powdered activated carbon as a slurry in water reduces dust, clumping, and flow problems, making handling easier and feeding more consistent. PAC is a very fine, fine powder, so when it’s fed dry it tends to create dust clouds, bridge in hoppers, and vary in bulk density, leading to inconsistent dosing and more wear on feeders. Turning the PAC into a slurry provides a liquid-like medium that can be pumped or metered more reliably, keeps the carbon suspended for uniform delivery, and minimizes operator exposure to dust. The other methods rely on dry powder feeding, which is more prone to dust generation, caking, bridging, and density-related dosing variability, making slurry the better choice for reducing handling problems.