The Full Form of MLSS is Mixed liquor suspended solids.
The MLSS is a term used to describe the concentration of the TSS (particulate matter) in the activated sludge system. The TSS can be divided into two fractions:
- Organic (volatile)
- Inorganic (fixed).
The MLVSS represents the organic fraction of the MLSS, which comprises:
- The active bacteria that utilizes organic matter and nutrients in the influent
- The endogenous residue caused by cell decay
- Non-biodegradable organic matter (suspended and settle-able) in the influent
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