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Assessment of toxicity of a biosurfactant from Candida sphaerica UCP 0995 cultivated with industrial residues in a bioreactor
Sobrinho, Humberto Bezerra de Souza; Luna, Juliana Moura de; Rufino, Raquel Diniz; Porto, Ana Lúcia Figueiredo; Sarubbo, Leonie Asfora.
  • Sobrinho, Humberto Bezerra de Souza; Universidade Católica de Pernambuco. Centro de Ciências e Tecnologia. Recife. BR
  • Luna, Juliana Moura de; Universidade Católica de Pernambuco. Centro de Ciências e Tecnologia. Recife. BR
  • Rufino, Raquel Diniz; Universidade Católica de Pernambuco. Centro de Ciências e Tecnologia. Recife. BR
  • Porto, Ana Lúcia Figueiredo; Universidade Católica de Pernambuco. Centro de Ciências e Tecnologia. Recife. BR
  • Sarubbo, Leonie Asfora; Universidade Católica de Pernambuco. Centro de Ciências e Tecnologia. Recife. BR
Electron. j. biotechnol ; 16(4): 4-4, July 2013. ilus, tab
Article in English | LILACS | ID: lil-684019
ABSTRACT

Background:

The aim of the present study was to propose a low-cost method for the production of a biosurfactant by the yeast Candida sphaerica and assess its toxicity and phytotoxicity. The medium was formulated with distilled water supplemented with residue from a soy oil refinery (5%) and corn steep liquor (2.5%) as substrates. These two products were the sources of carbon and nitrogen as well as mineral elements to encourage the growth of the microorganism and production of a biosurfactant.

Results:

The isolated biosurfactant yield was 6.364 g/l. The biosurfactant exhibited an excellent ability to reduce surface tension (26 mN/m) and demonstrated no toxicity against seeds of Brassica oleracea, Chicoria intybus and Solanum gilo or the micro crustacean Artemia salina employed as a bioindicator. The biosurfactant exhibited no antimicrobial activity against the fungi and bacteria tested.

Conclusions:

The promising results obtained in this study indicate the feasibility of producing biosurfactants from powerful non-toxic organic residues and their application in the bioremediation of contaminated soil and water.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Surface-Active Agents / Candida Language: English Journal: Electron. j. biotechnol Journal subject: Biotechnology Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Católica de Pernambuco/BR

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Full text: Available Index: LILACS (Americas) Main subject: Surface-Active Agents / Candida Language: English Journal: Electron. j. biotechnol Journal subject: Biotechnology Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Católica de Pernambuco/BR