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Streptococcus zooepidemicus 유래 히알루론산의 경제적 생산을 위한 연속배양 공정 개발

Development of Continuous Culture Process for Economic Production of Hyaluronic Acid (HA) Biosynthesized by Streptococcus zooepidemicus

Microbiology and Biotechnology Letters 2020년 48권 4호 p.525 ~ 532
김수연, 전계택,
소속 상세정보
김수연 ( Kim Soo-Yeon ) - Kangwon National University College of Biomedical Sciences
전계택 ( Chun Gie-Taek ) - Kangwon National University College of Biomedical Sciences

Abstract


A continuous fermentation process was carried out to enhance hyaluronic acid (HA) production using Streptococcus zooepidemicus cells. During the 1st stage continuous operation from 8 h with a dilution rate of 0.029/h (D1), HA was produced in the range of 7.5?10 g/l. During the 2nd stage from 44 h with a dilution rate of 0.036/h (D2), HA production (8.28 g/l) was initially reduced to a small extent due to increase of dilution rate from D1 to D2, and then a new pseudo-steady state was formed within a few hours with a concurrent small variations of HA production. The HA amount produced during the latter part of the 2nd stage was stably maintained in the range of 8.28?9.48 g/l, about 4.7% less amount compared to the 1st stage. Due to 24% increase of dilution rate from D1 to D2, however, maximum volumetric productivity (DP) amounting to 0.341 g/l/h was obtained at 96 h during the 2nd stage. This maximum productivity obtained from the continuous culture turned out only a small increase (3%) as compared to the corresponding batch fermentation. However, it should be noted that, in the case of batch process, one run typically consists of serial stages of growth culture plus one final production culture. This implies that, if the continuous fermentation that practically needs no dead time necessary for the multi-stage growth cultures is run for longer period, the total amount of the accumulated HA would be far greater than the amount obtained from the corresponding batch culture performed for the identical period.

키워드

Hyaluronic acid; Streptococcus zooepidemicus; batch fermentation; continuous culture; dilution rate; steady state

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