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.