The amount of bioemulsifier produce

The amount of bioemulsifier produced by Paenibacillus
sp. #510 under aerobic conditions (6.1-7.9 g/l) was
similar to those reported for yeasts and Streptomyces
species [13,14,20], but considerably higher when compared
with the amounts produced by other bacteria (between
1.4 and 4.2 g/l) [3,5,9,11]. Moreover, the
bioemulsifier produced by Paenibacillus sp. #510 did not
significantly reduce the surface tension of the culture
medium, which is the general characteristic of bioemulsifiers
produced by a number of bacteria, yeasts and filamentous
fungi [4,6,8-12].
To our knowledge, bioemulsifier production by Paenibacillus
strains has not been previously reported. Najafi
et al. [24] isolated a Paenibacillus alvei strain from an
Iranian oil field that produced a lipopeptide biosurfactant
able to reduce the surface tension up to 35 mN/m.
However, no emulsifying activity was reported by the authors
for that isolate.