Biosolids are defined as which of the following?

Biosolids are defined as which of the following?

• A. Treated municipal sewage sludge
• B. Industrial waste
• C. Treated water
• D. Raw sludge

Answer: (A)

Biosolids are the treated, stabilized solids produced from municipal wastewater sludge after it has undergone processing to reduce pathogens and odors. This treatment makes the material safe enough for handling and potential beneficial use, such as land application or disposal. It comes from the solids collected in municipal wastewater plants, not from industrial waste streams, and not from the treated liquid. That’s why the best choice is treated municipal sewage sludge. The other options don’t fit: industrial waste is not municipal sewage sludge, treated water is the liquid effluent, and raw sludge is untreated material.

Biosolids are the treated, stabilized solids produced from municipal wastewater sludge after it has undergone processing to reduce pathogens and odors. This treatment makes the material safe enough for handling and potential beneficial use, such as land application or disposal. It comes from the solids collected in municipal wastewater plants, not from industrial waste streams, and not from the treated liquid.

That’s why the best choice is treated municipal sewage sludge. The other options don’t fit: industrial waste is not municipal sewage sludge, treated water is the liquid effluent, and raw sludge is untreated material.