Which chemical is recommended for odor control in sewers?

Which chemical is recommended for odor control in sewers?

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

Answer: (A)

Odor in sewers mainly comes from hydrogen sulfide produced when organic matter decomposes in low-oxygen conditions. Controlling those odors works best when the chemical oxidizes sulfide compounds, turning them into non-odorous forms. Chlorine does just that: it oxidizes sulfide to sulfate, reducing the foul smell and helping with disinfection as well. The other options don’t address this chemical change: muriatic acid would lower pH and can cause safety and corrosion problems without oxidizing sulfides, while potassium chloride and sodium chloride are just salts that don’t react to remove sulfide odors. So chlorine is the recommended choice for odor control in sewers.

Odor in sewers mainly comes from hydrogen sulfide produced when organic matter decomposes in low-oxygen conditions. Controlling those odors works best when the chemical oxidizes sulfide compounds, turning them into non-odorous forms. Chlorine does just that: it oxidizes sulfide to sulfate, reducing the foul smell and helping with disinfection as well. The other options don’t address this chemical change: muriatic acid would lower pH and can cause safety and corrosion problems without oxidizing sulfides, while potassium chloride and sodium chloride are just salts that don’t react to remove sulfide odors. So chlorine is the recommended choice for odor control in sewers.