Fig. 2From: Sustainable municipal wastewater treatment using an innovative integrated compact unit: microbial communities, parasite removal, and techno-economic analysisCorrelogram showed the correlation between the removal of different environmental parameters and bacterial indicators in the integrated wastewater treatment unit. The blue color gradient indicated positive correlation levels; the red color gradient indicated negative correlation levels. *** P < 0.001, ** P < 0.01, *P < 0.05Back to article page