Faculty of Biology, University of Latvia
EEB
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Env Exp Biol (2013) 11: 125–130
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Environmental and
Experimental
Biology

Env Exp Biol (2013) 11: 125–130

Original Article

The use of raw cheese whey and olive oil mill wastewater for rhamnolipid production by recombinant Pseudomonas aeruginosa

Aylin Kıtlık Colak, Hüseyin Kahraman*
Department of Biology, Faculty of Art and Science, Inonu University, Malatya 44280, Turkey
*Corresponding author, E-mail: huseyin.kahraman@inonu.edu.tr

Abstract

This study concerns the potential of whey and olive oil mill wastewater for rhamnolipid production. The production of rhamnolipids in Pseudomonas aeruginosa and its recombinant form expressing Vitreoscilla hemoglobin gene (vgb) was studied. Rhamnolipid production by P. aeruginosa and the recombinant was examined using different carbon sources in defined medium containing 30 to 50% olive oil mill wastewater or whey, and cultivated at 30 and 37°C with agitation speed of 100 to 200 rpm for 96 h. The effect of vgb on rhamnolipid production was significant. The highest rhamnolipid level was obtained from whey in cultures grown at 37°C 100 rpm agitation, and reached 9.6 and 13.3 g L–1 for 72 h using P. aeruginosa and its recombinant strain, respectively. The study showed that genetic engineering of strains with vgb may be an effective method to increase rhamnolipid production.

Key words: olive oil mill wastewater, Pseudomonas aeruginosa, rhamnolipid production, Vitreoscilla hemoglobin, whey.

 
Env Exp Biol (2013) 11: 125–130
 DOI: http://doi.org/10.22364/eeb
EEB

Editor-in-Chief
Prof. Gederts Ievinsh



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University of Latvia

 
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