초록
<P>An amylase and lipase producing bacterium (strain C2) was enriched and isolated from soil regularly contaminated with olive washing wastewater in Sfax, Tunisia. Cell was aerobic, mesophilic, Gram-negative, motile, non-sporulating bacterium, capable of growing optimally at pH 7 and 30°C and tolerated maximally 10% (W/V) NaCl. The predominant fatty acids were found to be C<SUB>18:1</SUB>ω7c (32.8%), C<SUB>16:1</SUB>ω7c (27.3%) and C<SUB>16:0</SUB> (23.1%). Phylogenetic analysis of the 16S rRNA gene revealed that this strain belonging to the genus <I>Pseudomonas</I>. Strain C2 was found to be closely related to <I>Pseudomonas luteola</I> with more than 99% of similarity. Amylase optimization extraction was carried out using Box Behnken Design (BBD). Its maximal activity was found when the pH and temperature ranged from 5.5 to 6.5 and from 33 to 37°C, respectively. Under these conditions, amylase activity was found to be about 9.48 U/ml.</P>