Ultrafiltration in two steps of surfactin produced by Bacillus subtilis LB5a using lyophilized cassava wastewater as substrate

• Grant number: 12/20982-0
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Effective date (Start): October 01, 2013
• Effective date (End): September 30, 2014
• Field of knowledge: Agronomical Sciences - Food Science and Technology - Food Science
• Principal Investigator: Glaucia Maria Pastore
• Grantee: Cristiano José de Andrade
• Supervisor: Paula Jauregi
• Host Institution: Faculdade de Engenharia de Alimentos (FEA). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Research place: University of Reading, England
• Associated to the scholarship: 11/22776-5 - Utilization of cassava waste water dehydrated and whey as culture medium to production of biossurfactant and buteno-2,3-diol by Bacillus subtilis., BP.DR

Abstract

Biosurfactants are amphiphilic compounds produced by living organisms. Bacillus subtilis produces surfactin, a natural powerful surface-active agent. Interest in its industrial and environmental applications constantly increases, however due to high production costs, its commercial use is impracticable. Agroindustrial wastes could be an alternative of low cost substrates, besides, the purification, in general, is the critical step in biotechnogical process and, in this case, represents about 80% of total cost of production. Therefore, the aim of this project is evaluate the lyophilization of cassava wastewater, followed of its rehydration and use as culture medium, besides, it includes the most current significant step in the field of production cost, in other words, downstream, which in this case will be ultrafiltration. (AU)