Fig. 4

A Qualitative analysis of peroxidase by Poly-R478 and Azure-B plate assays. B Bacillus aryabhattai B8W22's phenol-degradation efficiency. Isolate No.4 showed a maximum biomass and phenol degradation efficiency of 99.6%. C Peroxidase activity among the selected isolates. Six different bacterial isolates were tested quantitatively for their ability to produce extracellular peroxidase enzymes. The data showed that each of the six isolates secreted peroxidase at a different level. However, isolate No. 4 had the highest peroxidase activity (U/ml). The significance of the results was determined using a one-way ANOVA followed by a Tukey post-hoc test. Data are presented as mean ± SD ( **** (P ≤ 0.0001), *** (P ≤ 0.0002), and ** (P ≤ 0.0021), * (P ≤ 0.0332), (ns = 0.1234)