کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
301307 512502 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lipid production from sweet sorghum bagasse through yeast fermentation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Lipid production from sweet sorghum bagasse through yeast fermentation
چکیده انگلیسی

Cryptococcus curvatus has great potential in fermenting unconditioned hydrolysates of sweet sorghum bagasse. With hydrolysates obtained by enzymatic hydrolysis of the solid pretreated by microwave with lime, the maximal yeast cell dry weight and lipid content were 10.83 g/l and 73.26%, respectively. For hydrolysates obtained in the same way but without lime, these two parameters were 15.50 g/l and 63.98%, respectively. During yeast fermentation, glucose and xylose were consumed simultaneously while cellobiose was released from the residual bagasse. The presence of lime, on one hand, made cellulose more accessible to enzymes as evidenced by higher total reducing sugar release compared to that without during enzymatic hydrolysis step; on the other hand, it caused the degradation of sugars to non-sugar chemicals during pretreatment step. As a result, higher lipid yield of 0.11 g/g bagasse or 0.65 ton/hectare of land was achieved from the pathway of microwave pretreatment and enzymatic hydrolysis while 0.09 g/g bagasse or 0.51 ton/hectare of land was attained from the process of lime-assisted microwave pretreatment followed by the same enzymatic saccharification.


► Lime assisted microwave pretreatment is effective in disrupting structure of sweet sorghum bagasse.
► Cryptococcus curvatus can grow on hydrolysates derived directly after pretreatment and enzymatic hydrolysis.
► High lipid yield was observed from hydrolysates treated by microwave but without lime.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Renewable Energy - Volume 40, Issue 1, April 2012, Pages 130–136
نویسندگان
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