What does MLVSS represent and why is it used?

• A. Mixed Liquor Visual Solids; the visible solids in the basin.
• B. Mixed Liquor Volatile Solids; the organic portion of MLSS representing active biomass.
• C. Mixed Liquor Volatile Solids; the organic portion of MLSS representing mature solids.
• D. Mixed Load of Volatile Substances; the gas content.

Answer: (C)