Figure 3: Average MLSS values in January, 2022 in the six basins of the
SBR
From the figure, it can be seen that there is a sequential increase in
the MLSS values in the six basins except for a slight fall in basin 3.
Again after that, the MLSS values have continuously increased and basin
6 has the highest MLSS value which is the normal case for an SBR. As the
wastewater purification proceeds in a stepwise manner, the water content
is sequentially removed, increasing amounts of solids accumulate and
hence the first basin shows minimum MLSS concentration while the last
shows the maximum value. The standard deviation values also are within
limits which shows that the performance of the plant over the month was
highly stable and efficient.