Fig. 2. | Scientific Reports

Fig. 2.

From: Comparative performance of activated sludge and waste stabilization ponds for the removal of pollutants and pathogens in full-scale wastewater treatment plants in Egypt

Fig. 2.

Principal component analysis (PCA) of physicochemical parameters in influent and effluent samples from WWTP A and WWTP B. Points show individual samples (color = WWTP, shape = stage), and the first two components explain 42.69% and 18.23% of the variance. Dashed ellipses indicate 95% confidence intervals for each WWTP, highlighting within-plant variability and the overall separation between influent and effluent.

Back to article page