淀粉质培养基中的氧传递缺陷。

Oxygen transfer deficiencies in starch-based media.

机构信息

Laboratory of Biochemical Reactors, Institute of Chemical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl.103, 1113, Sofia, Bulgaria.

出版信息

World J Microbiol Biotechnol. 1992 May;8(3):264-6. doi: 10.1007/BF01201875.

DOI:10.1007/BF01201875

PMID:24425474

Abstract

Insufficient oxygen transfer in a highly viscous media with varying viscosity occurs during the degradation of starch byBacillus licheniformis. Oxygen transfer rate (OTR) decreased below 0.3 gl(-1) h(-1) for viscosities above 5 to 10 mPa.s and agitation speeds lower than 710 rev/min. Increasing agitation speeds by 30 to 50% compensated for the decrease in OTR for viscosities between 10 and 200 mPa.s. A dual impeller is considered essential for growth improvement.

摘要

在淀粉被地衣芽孢杆菌降解的过程中，高度粘稠的介质中会出现氧气传递不足的情况，且介质的粘度是变化的。当粘度高于 5 至 10 毫帕·秒且搅拌速度低于 710 转/分时，氧气传递率（OTR）会下降到 0.3 克/升·小时以下。对于 10 至 200 毫帕·秒的粘度，通过将搅拌速度提高 30%至 50%，可以补偿 OTR 的下降。对于提高生长，双叶轮被认为是必不可少的。