UNIVERSITÉ PAUL CÉZANNE, AIX MARSEILLE III - IMEP

3.3. Decolorization of OMW
Résultats et discussion. Chapitre 1 : Criblage des souches de L. edodes
The decolorization of OMW by four selected strains of L. edodes is shown in Figure 2.
The maximum amount of color removal was recorded in the strain Le119 (65%), while the
strain Le118 exhibited low OMW decolorization during the initial stage of incubation but
increased absorbance values with time. The other two strains were found to be moderate
decolorizers of OMW. At the end of incubation period, a progressive darkening of the
biomass was observed, which could be due to the adsorption of phenolic polymers by the
mycelium. Accumulation of colored compounds into the mycelium has been estimated in
about 10 % of the initial total color.
Absorbance at 395 nm
2,5
2
1,5
1
0,5
0
0 5 10 15 20 25 30
Time (day)
Figure 2: Profiles of color in OMW incubated, without inoculation (control) ( ) and with
four L. edodes strains Le118 ( ), Le119 ( ), Le121 ( ) and Le122 ( ), at 25°C.
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