Microbial Adhesion and Biofilm Formation on Microfiltration Membranes: A Detailed Characterization Using Model Organisms with Increasing Complexity

Figure 7

RDA ordination diagram based on the bacterial ARISA data, representing the interaction between membrane type and treatment (B). 𝜆₁ represents the eigenvalue axis 1; 𝜆₂ represents the eigenvalue axis 2. Arrows represent significant environmental variables superimposed onto the ordination; the length of the arrow indicates the correlation between the environmental variable and the ordination axis. Adhesion data (dots): 1 h incubation in the lab-scale MBR, Ringer data (squares): 1 h incubation in the lab-scale MBR followed by 24 h biofilm in Ringer’s solution, and biofilm data (diamonds): 24 h incubation in the lab-scale MBR.