Mixed liquor suspended solids values

However, Mueller et al. presented recently the data on the nominal diameter of activated sludge and the water content [8]. Assuming the spherical floe, the nominal diameter, dj-. microns is determined from the observations of dry and wet densities of the floe, the number of floes per unit volume of liquid and in addition, from the value of MLSS (mixed liquor suspended solids). 

The proportion of the respective population of heterotrophs and nitrihers varies with the ratio of the influent BOD5 to influent TKN as shown in Table 15.4. Based on this table, the concentrations of the respective species may be calculated. Also, the design total volatile solids (MLVSS, for mixed liquor volatile suspended solids) vary depending upon the type of activated sludge process being used. Table 15.5 shows some representative values. Note that the air supplied is measured at normal air temperatures. 

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