A few Bacillus species produce long chain fatty acids (B. subtilis and B. megaterium). 

In order to isolate them, here is the general procedure:

http://www.mbio.ncsu.edu/mb452/Bacillus/isolation.html

Here are some test results for B. subtilis:

 http://pubs.sciepub.com/ajmr/1/1/3/image/tab2.png

And results for B. megaterium: 

http://pubs.sciepub.com/env/1/2/5/image/tab1.png

Hope this helps. If not, please let me know and I will more than happily continue looking for alternative bacteria or tests.

Could this paper help you?

please  any type of bacillus used as i know there are pathogenic types make food poisoning