Vinasse, a residue from bioethanol production containing high organic matter concentration, was used as substrate in submerged fermentation of Pseudomonas aeruginosa PA1 for biosurfactant production. About 2.7 g/L of rhamnolipids was obtained, with surface tension of 29.2 mN/m and critical micelle concentration of 80.3 mg/L. After separation of rhamnolipid and biomass, residual fermentation med...

Biosurfactant activity and naphthalene degradation by a new strain identified as Bacillus cereus 28BN were studied. The strain grew well and produced effective biosurfactants in the presence of n-alkanes, naphthalene, crude oil and vegetable oils. The biosurfactants were detected by the surface tension lowering of the medium, thin layer chromatography and infrared spectra analysis. With (2%) na...

The sugar beet processing in the production industry releases huge amounts of pulp, lime residue, and molasses, which can be considered a valuable by-product as source cellulose, hemicellulose, pectin. Sugar pulp is often used high-energy, low-protein supplement for ruminants to promote optimal rumen health increase milk production. However, it cannot large quantities thrown away, causing envir...

RHAMNOLIPIDS—BRIEF OUTLINE Biosurfactants, widely known as surfaceactive agents of biological origin, have carved a niche for themselves in the market due to their unique environmentfriendly properties. They have come a long way since first biosurfactant “surfactin” was purified and characterized by Arima et al. (1968). Biosurfactants have been researched thoroughly and satisfactorily since the...