Heavier material and settleable solids are removed from wastewater in?

Heavier material and settleable solids are removed from wastewater in?

• A. Vacuum filtration
• B. Primary treatment
• C. Preliminary treatment
• D. None of the above

Answer: (B)

The correct answer is primary treatment because this phase of wastewater treatment specifically focuses on the removal of heavier materials and settleable solids through processes that allow these substances to settle to the bottom of a sedimentation tank. During primary treatment, the wastewater is typically allowed to sit in large tanks where gravitational settling occurs, causing heavier particles to fall and form sludge. This is an essential step in wastewater treatment as it reduces the load of solids that will later be treated in secondary processes and helps to improve the overall efficiency of the treatment system. While preliminary treatment involves the removal of larger debris and grit through mechanical means, it does not specifically target settleable solids in the same way that primary treatment does. Examples of preliminary treatment include screening and grit removal. Consequently, preliminary treatment is more about blocking larger objects rather than sedimentation of heavier solids. Thus, primary treatment is the most accurate choice for the removal of heavy materials and settleable solids from wastewater.

The correct answer is primary treatment because this phase of wastewater treatment specifically focuses on the removal of heavier materials and settleable solids through processes that allow these substances to settle to the bottom of a sedimentation tank. During primary treatment, the wastewater is typically allowed to sit in large tanks where gravitational settling occurs, causing heavier particles to fall and form sludge. This is an essential step in wastewater treatment as it reduces the load of solids that will later be treated in secondary processes and helps to improve the overall efficiency of the treatment system.

While preliminary treatment involves the removal of larger debris and grit through mechanical means, it does not specifically target settleable solids in the same way that primary treatment does. Examples of preliminary treatment include screening and grit removal. Consequently, preliminary treatment is more about blocking larger objects rather than sedimentation of heavier solids. Thus, primary treatment is the most accurate choice for the removal of heavy materials and settleable solids from wastewater.