Figure 2: Time series plot of geometric mean of the solid particles in different centrifuge outlets
From the time series plot it is evident that there are certain ups and downs as the geometric mean of seven outlets has been taken but the overall efficiency of dewatering is within a range of 22.24 to 28.09% which is a very small range. The standard deviation is also very less with a maximum value of 4.78. It can be deciphered that the working efficiency of the plant is very high and all the centrifuges are working at comparable efficiencies. Data over a month in this range also states that the sludge generation capacity is also optimum.
Data for MLSS (mg/L) in the six basins of the SBR in January, 2022 has been given as Table 2 in supplementary material
The mean of each basin along with the standard deviation was plotted and is shown in Figure 3 below.