SS is suspended solids, SS is the abbreviation of English (Suspended Solid or Suspended Substance), that is, suspended solids in water quality.
water quality refer to solid substances that water samples are trapped on the filter membrane through a filter membrane with a pore size of 0.45 μm and dried to constant weight at 103~105 ℃. it is one of the important indicators to measure the pollution degree of water quality. the commonly used large letter c indicates the suspended solids content in water quality, and the unit of measurement is mg/l.
MLSS is the concentration of suspended solids in the mixed liquor, I .e. the sludge concentration, which indicates the concentration of suspended solids contained in the unit volume of the mixed liquor in the aeration tank, which indirectly reflects the amount of microorganisms contained in the mixed liquor. In order to maintain the purification efficiency of the aeration tank, a certain amount of sludge concentration must be maintained in the tank. Generally speaking, for the ordinary activated sludge process, the MLSS in the aeration tank is often controlled at 2~3g/L.
MLVSS is the concentration of volatile suspended solids in mixed liquor, which indicates the concentration of organic solids in activated sludge and can better reflect the activity of sludge.
In a certain wastewater and treatment system, the proportion of suspended solids in the activated sludge is certain, the MLVSS/MLSS value is relatively stable, and the activated sludge of municipal sewage is between 0.75 and 0.85.
MLSS is generally used in biological tanks to characterize the sludge concentration of biological systems.
SS refers to the suspended solids contained in the inlet and outlet, with many pollutants, including COD, P, etc., which is a kind of influent water quality.
SS is suspended solids, SS is the abbreviation of English (Suspended Solid or Suspended Substance), that is, suspended solids in water quality.
water quality refer to solid substances that water samples are trapped on the filter membrane through a filter membrane with a pore size of 0.45 μm and dried to constant weight at 103~105 ℃. it is one of the important indicators to measure the pollution degree of water quality. the commonly used large letter c indicates the suspended solids content in water quality, and the unit of measurement is mg/l.
MLSS is the concentration of suspended solids in the mixed liquor, I .e. the sludge concentration, which indicates the concentration of suspended solids contained in the unit volume of the mixed liquor in the aeration tank, which indirectly reflects the amount of microorganisms contained in the mixed liquor. In order to maintain the purification efficiency of the aeration tank, a certain amount of sludge concentration must be maintained in the tank. Generally speaking, for the ordinary activated sludge process, the MLSS in the aeration tank is often controlled at 2~3g/L.
MLVSS is the concentration of volatile suspended solids in mixed liquor, which indicates the concentration of organic solids in activated sludge and can better reflect the activity of sludge.
In a certain wastewater and treatment system, the proportion of suspended solids in the activated sludge is certain, the MLVSS/MLSS value is relatively stable, and the activated sludge of municipal sewage is between 0.75 and 0.85.
the determination methods of the two are similar, the weighing difference of constant weight is different. SS empty bottles are required to be less than or equal to 0.2mg, and samples are required to be less than or equal to 0.4mg.MLSS empty bottles and samples are required to be less than or equal to 0.5mg.
the two determination methods are similar, but the significance is not the same, the former is to determine the concentration of suspended solids in wastewater (containing little inorganic solids), the latter is to determine the concentration of aeration tank sludge, sludge also contains more inorganic solids