Which chemical may be used for odor control in sewers?

Which chemical may be used for odor control in sewers?

• A. Chlorine
• B. Muriatic acid
• C. Potassium chloride
• D. Sodium chloride

Answer: (A)

Odor control in sewer systems mainly aims to neutralize the hydrogen sulfide and other sulfur compounds that cause the rotten-egg smell by oxidizing them. Chlorine is a common oxidizing agent used for this purpose because it readily reacts with hydrogen sulfide to form sulfate, effectively reducing odors and also providing disinfection. Muriatic acid is just hydrochloric acid and is used for pH adjustment or cleaning; it doesn’t target odor-causing compounds and can even promote corrosion or other issues. Potassium chloride and sodium chloride are salts that don’t oxidize odor-causing compounds, so they don’t provide odor control in sewers.

Odor control in sewer systems mainly aims to neutralize the hydrogen sulfide and other sulfur compounds that cause the rotten-egg smell by oxidizing them. Chlorine is a common oxidizing agent used for this purpose because it readily reacts with hydrogen sulfide to form sulfate, effectively reducing odors and also providing disinfection. Muriatic acid is just hydrochloric acid and is used for pH adjustment or cleaning; it doesn’t target odor-causing compounds and can even promote corrosion or other issues. Potassium chloride and sodium chloride are salts that don’t oxidize odor-causing compounds, so they don’t provide odor control in sewers.