ISSN:
1572-9729
Keywords:
Aroclor
;
biosurfactant
;
degradation of PCBs
;
Pseudomonas cepacia
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Energy, Environment Protection, Nuclear Power Engineering
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract A bioemulsifier excreting bacterium of the species Peudomonas cepacia was isolated after a screeningprocedure using n-dodecane as carbon source. Thepartly purified bioemulsifier was preliminarily identifiedas a mixture of glycolipids. A decrease of the surfacetension to 37 mN/m and a CMC of 5 mg/l could bemeasured with the bioemulsifier GL-K12. Usingsunflower oil as main carbon source, up to 7.1 g/lbioemulsifier could be produced in oxygen and nitrogenlimited fermentations on a scale of 300 l. Thebiodegradation of Aroclor 1242 in liquid cultures by abacterial mixed population was enhanced by GL-K12when added at biosurfactant concentrations of 0.2 g/l ormore. The most positive effect was noted in thedegradation of PCB congeners with 3 Cl atoms with anincrease of up to 100%.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008256110136
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