شماره ركورد كنفرانس :
4518
عنوان مقاله :
Effect of temperature and pH on rhamnolipid production in solid-state cultivation using corn residues
Author/Authors :
Soheil Ahmadi Biotechnology Research Laboratory - School of Chemical Engineering - Iran University of Science and Technology , Parisa Hejazi Biotechnology Research Laboratory - School of Chemical Engineering - Iran University of Science and Technology , Fereshteh Naeimpoor Biotechnology Research Laboratory - School of Chemical Engineering - Iran University of Science and Technology
كليدواژه :
Solid state cultivation , Rhamnolipid , Corn bran , Corn germ
عنوان كنفرانس :
The 7th International Chemical Engineering Congress & Exhibition (IChEC 2011
چكيده لاتين :
Rhamnolipid biosurfactants are attracting attention due to their low toxicity, high biodegradability, and good ecological acceptability. However due to severe foaming problems, biosurfactant production in submerged culture is difficult. Solid-state cultivation (SSC) is a promising alternative production method. Using SSC, it is possible to utilize renewable and low cost natural resources such as agricultural residues and byproducts of food industry. In this work, the effect of temperature and pH as cultivation conditions on a solid substrate consisting of corn bran and germ for biosurfactant production by Pseudomonas aeruginosa XD-10 was studied. It was shown that rhamnolipid production varies by temperature and pH with 30 °C and 7 being the favorable values, respectively. The best rhamnolipid production was found to be 2 g of rhamnolipid per kilogram of dry initial substrate (IDWS) which was obtained after 3 days. A maximum emulsion index of 75% was observed for the produced biosurfactant using diesel and gasoline.
