Bacterial strains isolated

D1.1

D1.3

D1.4

D1.6

MnP enzyme activity (U/liter)

2.9690

5.9791

7.4738

5.2317

aAn unit of enzyme activity of MnP is required for oxidation 1 μM of phenol red forming a product absorption wavelength λ = 610 nm in 1 min at the experimental conditions.
Table 2: MnP enzyme activity (U/liter) a of four microorganism after 120 hours of culture on mineral salts liquid medium.