At pilot-scale. For a 70-l fermenter, the first seed culture was prepared in 5-l-jar fermenter, as described previously and the same was used as inoculum for 70-l fermenter having working volume 50-l. The culture broth was cultivated for 24 h at 28 8C with 150 rpm and 1 vvm air before adding concerned substrates (colchicine or thiocolchicine). At this stage,the impeller tip velocity was 3140 cm/min. Subsequently, the tip velocity was gradually increased to 4710 cm/min after 36 h of fermentation and the same rate of impeller tip velocity was maintained till the 72 h when the fermentation process was terminated. The total amount of glucose + glycerol, and substrate (colchicine or thiocolchicine) feed to the 70-l fermenter in 72 h were 750, 350 g,
respectively by the peristaltic pump coupled with pH probe automatically.
At pilot-scale. For a 70-l fermenter, the first seed culture was prepared in 5-l-jar fermenter, as described previously and the same was used as inoculum for 70-l fermenter having working volume 50-l. The culture broth was cultivated for 24 h at 28 8C with 150 rpm and 1 vvm air before adding concerned substrates (colchicine or thiocolchicine). At this stage,the impeller tip velocity was 3140 cm/min. Subsequently, the tip velocity was gradually increased to 4710 cm/min after 36 h of fermentation and the same rate of impeller tip velocity was maintained till the 72 h when the fermentation process was terminated. The total amount of glucose + glycerol, and substrate (colchicine or thiocolchicine) feed to the 70-l fermenter in 72 h were 750, 350 g,respectively by the peristaltic pump coupled with pH probe automatically.
การแปล กรุณารอสักครู่..
