Final answer:
The correct loading rate for PAC (powdered activated carbon) slurry tanks is usually d) 20 gpm.
Step-by-step explanation:
In water treatment processes, the loading rate for PAC slurry tanks often operates at 20 gallons per minute (gpm). This rate ensures efficient dispersion and adequate contact time between the activated carbon particles and the water, allowing for optimal adsorption of impurities. This higher loading rate facilitates a more rapid and effective purification process within water treatment systems, enhancing the removal of contaminants and improving water quality.
The 20 gpm loading rate strikes a balance between effectiveness and operational efficiency, enabling the treatment plant to achieve desired purification levels without compromising the system's throughput or effectiveness.
Correct answer: d) 20 gpm