Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/196639
Type: Artigo de periódico
Title: Production And Properties Of A Surfactant Obtained From Bacillus Subtilis Grown On Cassava Wastewater.
Author: Nitschke, Marcia
Pastore, Glaucia Maria
Abstract: The production and properties of a biosurfactant, synthesized by Bacillus subtilis LB5a strain, using cassava wastewater as substrate were investigated. The microorganism was able to grow and to produce surfactant on cassava waste, reducing the surface tension of medium to 26.6 mN/m and giving a crude surfactant concentration of 3.0 g/L after 48 h. The surface-active compound retained its properties during exposure to elevate temperatures (100 degrees C), high salinity (20% NaCl) and a wide range of pH values. The surfactant was capable of forming stable emulsions with various hydrocarbons. Preliminary chemical characterization revealed that the surfactant has a lipopeptide composition with a CMC value of about 33 mg/L. Cassava wastewater proved to be a suitable substrate for biosurfactant biosynthesis, providing not only bacterial growth and product accumulation but also a surfactant that has interesting and useful properties with potential for many industrial applications.
Subject: Bacillus Subtilis
Hot Temperature
Hydrogen-ion Concentration
Manihot
Surface-active Agents
Time Factors
Waste Disposal, Fluid
Rights: fechado
Identifier DOI: 10.1016/j.biortech.2005.02.044
Address: http://www.ncbi.nlm.nih.gov/pubmed/16171690
Date Issue: 2006
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

Files in This Item:
File SizeFormat 
pmed_16171690.pdf284.14 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.