Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/328060
Type: Artigo
Title: Strategy For Waste Management In The Production And Application Of Biosurfactant Through Surface Response Methodology
Author: dos Santos
Brunno Ferreira; Ponezi
Alexandre Nunes; Frattini Fileti
Ana Maria
Abstract: This study aims to identify the optimal biosurfactant production process via fermentation by Bacillus subtilis, using waste material as alternative substrates (glycerin, water from potatoes processing, corn steep liquor, and frying oil), thereby highlighting the absence of synthetic substrates. A fractional factorial design 2(4-1) was previously used to determine the effects of the concentrations of the four substrates, selecting three of them to be used in a central composite rotatable design (CCRD) 2(3). Responses of the emulsifying index after 24 h (EI24) were first evaluated for fermentation in 250-mL flasks. Thus, the concentration of waste material that is able to provide EI24 up to 100 % from 9 % of glycerin and 1 % of potato peel was determined, with subsequent experimental validation at the optimized point. One-liter-bench-batch fermentation with the optimum medium (based on the CCRD) was also carried out. In order to compare, another 1-L-bench-batch fermentation was performed using residual glycerin through the biosurfactant concentrations, dry weight, oxygen dissolved, and pH profile. Evidence of high potential for biosurfactant production (with EI24 100 % to toluene, 67 % to hexane, and 62 % to soybean oil), which can be suitable for applications in oil recovery was presented.
Subject: Environmental Remediation
Experimental Design
Emulsification Index
Response Surface Modeling And Analysis
Waste Substrates
Oil Recovery
Editor: Springer
New York
Rights: fechado
Identifier DOI: 10.1007/s10098-015-1052-4
Address: https://link.springer.com/article/10.1007/s10098-015-1052-4
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
000371631800014.pdf990.61 kBAdobe PDFView/Open


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