Method for producing sophorolipid by continuous feeding and fermentation
A technology of fed-batch fermentation and sophorolipids, which is applied in the field of fermentation to produce sophorolipids, can solve the problems of unfavorable promotion and application of sophorolipids, low yield of sophorolipids, and large process loss rate, etc., and achieve high practical application value, The effect of shortening the fermentation cycle and improving production quality
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[0016] Example 1
[0017] (1) Preparation of spore suspension: Inoculate Saccharomyces sphaeroides TJZKBA10326 on the slant of the culture medium, cultivate at a constant temperature of 30°C for 2 days, add normal saline with a mass concentration of 0.75% to wash the mycelium to obtain a bacterial suspension and suspend it. The spore content in the liquid is about 3.6×10 5 One, to be used; the slant medium composition includes (1L): glucose 8g, malt powder 3g, peptone 4g, yeast powder 4g, agar 15g, distilled water to 1L, pH 3.5. The strain used is: Torulopsis bombicola TJZKBA10326.
[0018] (2) The above bacterial suspension is used to inoculate the sterilized liquid seed culture medium. The composition of the liquid seed culture medium includes (1L): fructose 30g, corn oil 30g, yeast powder 5g, urea 0.5g, and distilled water to make the volume constant To 1L, pH 3.5. Sterilize the liquid seed culture medium at 121°C for 15 minutes and then cool it to room temperature; then add t...
Example Embodiment
[0024] Example 2
[0025] (1) Preparation of spore suspension: inoculate Saccharomyces sphaeroides TJZKBA10326 on the slope, incubate at a constant temperature of 30°C for 2 days, add normal saline with a mass concentration of 0.75% to wash the mycelium, and obtain a bacterial suspension. The spore content is about 4.5×10 5 One, to be used; the slant medium composition includes (1L): glucose 8g, malt powder 3g, peptone 4g, yeast powder 4g, agar 15g, distilled water to 1L, pH 3.5.
[0026] (2) The above bacterial suspension is used to inoculate the sterilized liquid seed culture medium. The composition of the liquid seed culture medium includes (1L): 50g sucrose, 50g rapeseed oil, 7g yeast powder, 0.8g urea, fixed with distilled water Volume to 1L, pH 3.5. Sterilize the liquid seed medium at 121°C for 15 minutes and then cool it to room temperature; then add the spore suspension to the above-mentioned cooled liquid seed medium according to the volume ratio of 4% of the inoculum (th...
Example Embodiment
[0031] Example 3
[0032] (1) Preparation of spore suspension: Inoculate Saccharomyces coccidius TJZKBA10326 on the slope, culture at 30°C for 3 days, add normal saline with a mass concentration of 0.75% to wash the mycelium to obtain a bacterial suspension. Spore content is about 5.8×10 5 One, to be used; the slant medium composition includes (1L): glucose 8g, malt powder 3g, peptone 4g, yeast powder 4g, agar 15g, distilled water to 1L, pH 3.5.
[0033] (2) The above bacterial suspension is used to inoculate the sterilized liquid seed culture medium. The composition of the liquid seed culture medium includes (1L): glucose 60g, soybean oil 60g, yeast powder 8g, urea 1g, distilled water to make the volume to 1L, pH 3.5. Sterilize the liquid seed medium at 121°C for 15 minutes and then cool it to room temperature; then add the spore suspension to the above-mentioned cooled liquid seed medium according to the volume ratio of 3% of the inoculum (the amount of liquid in a 500ml shake b...
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