Abstrak 
Karakteristik Bio-surfaktan Dari Azotobacter Chroococcum
Pujawati Suryatmana
Unpad
Indonesia
Unpad
Azotobacter chroococcum, bio-surfactant, dispersion capcity, Emulsifikasi Index (E24)
The bio-surfactant produced by Azotobacter chroococcum consisted of biomolecules which have strong emulsification. The experiment was focused on determining the crude oil emulsification index of biosurfactan. The production of biosurfactant by A. chroococcum was influenced by pH and glucose concentration. The higher the glucose concentration, the larger the quantity of biosurfactant produced, meanwhile it achieved the maximum emulsification index (E24) and dispersion capcity to crude oil was achieved at a neutral pH. At a neutal conditions, the emulsification index (E24) was obtained at 95.6 %, and the dispersion capacity was 96.22 %. The component of biosurfactant produced using GC-MS, showed substances such as eugenol, dodecanoic acid, decanoic acid methyl ester, 9-octadecanoic acid, undec-10-ynoic acid, phthalic acid, cycloundecane carboxylic acid.