1.7 pH Adjustment

What is the pH range considered ideal for most wastewater treatment processes?

• 0-7

• 2-12

• 6-9

• 7-14

What is the chemical formula for sodium carbonate?

• NaCl

• Na2CO3

• NaOH

• Na2SO4

Which pH adjustment method involves the addition of an acid and a base to the wastewater to achieve the desired pH?

• Neutralization

• Coagulation

• Aeration

• Filtration

Which of the following chemicals is commonly used for acidic wastewater neutralization?

• Sodium hydroxide

• Hydrochloric acid

• Sodium carbonate

• Calcium hydroxide

What effect does low pH have on aquatic life in receiving waters?

• It increases oxygen levels

• It promotes fish growth

• It harms aquatic life

• It has no effect

What is the primary purpose of pH adjustment in industrial wastewater treatment?

• To enhance chemical reactions

• To prevent scaling in pipes

• To meet Influent regulations

• To reduce odor

What does the term "alkalinity" in water refer to?

• Acidic nature of water

• pH level below 7

• Capacity to neutralize acids

• High oxygen content

What is the primary role of pH in coagulation-flocculation processes in wastewater treatment?

• To reduce chemical consumption

• To enhance particle destabilization

• To increase dissolved oxygen levels

• To accelerate sedimentation

In which wastewater treatment stage is pH adjustment typically performed?

• Primary treatment

• Secondary treatment

• Tertiary treatment

• Preliminary treatment

What does the term "pH" stand for?

• Potential Hydrogen

• Power of Hydrogen

• Positive Hydrogen

• Proton Heavy