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   a study on lipid removal from yeast homogenate by chemical pretreatment  
   
نویسنده khosravi sereshki parisa ,jalalirad reza ,doroud delaram ,pajoum shariati farshid
منبع iranian journal of chemistry and chemical engineering - 2023 - دوره : 42 - شماره : 8 - صفحه:2561 -2569
چکیده    Lipids discharged into the yeast homogenate following the cell disruption process have a deleterious impact on the performance of chromatography columns during downstream processing. in this study, the removal of lipids from pichia pastoris crude extract was investigated using various chemicals at varied concentrations. after treatment of the sample with 0.05 m borax and 1.5% pei, a lipid reduction of about 52% and 79% was respectively obtained in the flocculated protein. the addition of peg 6000 to the sample at a final concentration of 20% led to 57% lipid removal. a lipid reduction of 67%–70% was observed when protein precipitation was performed by 20%–40% ammonium sulfate. the efficiency of acetone and diethyl ether for lipid reduction was greater than that of isopropanol, and substantial lipid removal (95%–100%) was demonstrated after feedstock treatment with 0.5%–5% acetone and diethyl ether. after conducting detergent lipid dissolution experiments, it was revealed that non-ionic detergents (triton x-100 and tween 20) at a concentration of 0.1% were able to eliminate 100% of lipids in the feedstock. overall, these findings suggest that such chemical treatment strategies may be considered to be used for pre-treating process streams and facilitating related research and applications in downstream processing.
کلیدواژه yeast homogenate; lipid removal; fouling; flocculation; salt and polymer precipitation; solvent and detergent lipid dissolution
آدرس islamic azad university, science and research branch, department of chemical engineering, iran, pasteur institute of iran, production and research complex, department of research and development, iran, pasteur institute of iran, production and research complex, department of research and development, iran, islamic azad university, science and research branch, department of chemical engineering, iran
پست الکترونیکی pajoum@srbiau.ac.ir
 
     
   
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