Stabilization of kerosene/water emulsions using bioemulsifiers obtained by fermentation of hemicellulosic sugars with Lactobacillus pentosus.
The results of the present study show that Lactobacillus pentosus can produce extracellular bioemulsifiers by utilizing hemicellulosic sugars from grape marc as a source of carbon. The effectiveness of these bioemulsifiers (LPEM) was studied by preparing kerosene/water (K/W) emulsions in the presence and absence of these emulsifiers. Various parameters such as relative emulsion volume (EV), stabilizing capacity (ES), viscosity, and droplet size of K/W emulsions were measured. The EV values for K/W emulsions stabilized by concentrated LPEM were approximately 74.5% after 72 h of emulsion formation, with ES values of 97%. These values were higher than those obtained with dodecyl sodium sulfate as emulsifier (EV=62.3% and ES=87.7%). Additionally, K/W emulsions stabilized by LPEM produced polydisperse emulsions containing droplets of radius between 10 and 40 μm, which were smaller than those obtained for K/W emulsions without LPEM (droplet radius=60-100 μm). Moreover, the viscosity values of the K/W emulsions without and with LPEM were approximately 236 and 495 cP, respectively.
Portilla-Rivera
Oscar Manuel
OM
Departamento de Ingeniería Agroindustrial, Universidad Politécnica de Guanajuato, CP 38483 Mexico.
Torrado
Ana María
AM
Domínguez
José Manuel
JM
Moldes
Ana Belén
AB
D055598:Chemical Phenomena; D045703:Emulsifying Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D004655:Emulsions; D005285:Fermentation; D005525:Food-Processing Industry / Q000191:economics; D005638:Fruit / Q000737:chemistry; D007220:Industrial Waste / Q000032:analysis / Q000191:economics; D007648:Kerosene; D007778:Lactobacillus / Q000378:metabolism*; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D027843:Vitis / Q000737:chemistry; D014867:Water
D045703:Emulsifying Agents; D004655:Emulsions; D007220:Industrial Waste; D007648:Kerosene; D011134:Polysaccharides; D014867:Water; C007916:hemicellulose