Involvement of lignin peroxidase in the decolourization of black olive mill wastewaters by Geotrichum candidum.
OBJECTIVE
Decolourization of black olive mill wastewaters (OMW) by depolymerization of phenolic compounds by Geotrichum candidum.


RESULTS
Our results show that G. candidum is able to grow on black OMW supplemented with carbon source and nitrogen. The Geotrichum growth decreased the pH and induced a 49% of colour removal when the black OMW was supplemented with glycerol and diammonium tartrate (20 mm ammonium). An improvement of 10% of colour removal was observed when the culture was supplemented with veratryl alcohol. The decolourization was inhibited with glutamate as nitrogen source.


CONCLUSIONS
Our results suggest the potential use of G. candidum in black OMW decolourization and support the concept that lignin peroxidase (LiP) of G. candidum is involved in the depolymerization of phenolic compounds.


CONCLUSIONS
This is the first report of LiP production by G. candidum on OMW.
Ayed
L
L
Institut National des Sciences Appliquées et de Technologie (INSAT), Boulevard de la terre, Tunis, Tunisia.
Assas
N
N
Sayadi
S
S
Hamdi
M
M
D001673:Biodegradation, Environmental; D005848:Geotrichum / Q000145:classification / Q000254:growth & development / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007218:Industrial Microbiology; D007220:Industrial Waste; D008031:Lignin / Q000378:metabolism; D000069463:Olive Oil; D010544:Peroxidases / Q000378:metabolism*; D010636:Phenols; D010938:Plant Oils / Q000378:metabolism; D014873:Water Pollutants / Q000378:metabolism*
D007220:Industrial Waste; D000069463:Olive Oil; D010636:Phenols; D010938:Plant Oils; D014873:Water Pollutants; D008031:Lignin; D010544:Peroxidases; C042858:lignin peroxidase