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

Table 2

Two-way factorial ANOVA results of the duospecies experiment using P. aeruginosa and E. coli. Bacterial cell density (log cells cm⁻² membrane) was selected as dependent variable and membrane type (PSF, PVDF, and PS) and bacterial coexistence (mono versus duospecies) as predictor variables.

	𝐹	𝑃
Duospecies experiment—adhesion
E. coli
Membrane	1.004	0.391
Coexistence (mono- and duospecies)	26.63	<0.001
Membrane * coexistence	2.083	0.162
P. aeruginosa
Membrane	8.50	0.005
Coexistence (mono- and duospecies)	0.11	0.744
Membrane * coexistence	2.11	0.164
Duospecies experiment—biofilm
E. coli
Membrane	10.03	0.967
Coexistence (mono- and duospecies)	11.41	0.005
Membrane * coexistence	1.513	0.263
P. aeruginosa
Membrane	1.274	0.321
Coexistence (mono- and duospecies)	5.639	0.032
Membrane * coexistence	1.937	0.198

Significant values are in bold. Bacterial cell density data were log transformed before analysis.