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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Effects of morphology and oxygen supply on schizophyllan formation by Schizophyllum commune using a pellet size controlling bioreactor
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Effects of morphology and oxygen supply on schizophyllan formation by Schizophyllum commune using a pellet size controlling bioreactor

机译:形态和供氧量对颗粒尺寸控制生物反应器对裂褶菌形成裂褶菌的影响

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摘要

The effects of mycelial morphology and oxygen supply on the production of the anti-tumor polysaccharide from Schizophyllum commune were evaluated in this study. A pellet size controlling bioreactor has been used successfully for the production of the anti-tumor polysaccharide of S commune. The average pellet size of mycelia in a bubble column bioreactor was around 20.5 mm in a typical run without using pellet size control. By forcing the fermentation broth through a pellet size control device with a stainless screen at five different fermentation times ranging from 1.0 to 4.5 days in each batch, different fungal pellet sizes ranging from 12.3 to 3.0 mm were achieved. The formation of anti-tumor polysaccharide, schizophyllan (SPG), was significantly associated with the pellet morphology and oxygen supply rate. An optimal product yield of 0.29 g g(-1) glucose was obtained when the pellet size was controlled at 12.3 mm. Oxygen transfer limitation inside the pellets was responsible for the formation of entrapped polysaccharide. Maximum entrapped SPG yield (Yp/s entrapped) of 0.88 g g(-1) glucose occurred at the optimal pellet size of 12.3 mm. (c) 2005 Society of Chemical Industry.
机译:在本研究中,评估了菌丝形态和供氧对裂褶菌属抗肿瘤多糖产生的影响。颗粒大小控制生物反应器已成功用于生产S公社的抗肿瘤多糖。在不使用沉淀尺寸控制的典型运行中,鼓泡塔生物反应器中菌丝体的平均沉淀尺寸约为20.5 mm。通过在每批中在五个不同的发酵时间(范围从1.0到4.5天)迫使发酵液通过带有不锈钢筛的颗粒大小控制装置,获得了从12.3到3.0 mm的不同真菌颗粒大小。抗肿瘤多糖schizophyllan(SPG)的形成与药丸的形态和供氧率显着相关。当颗粒尺寸控制在12.3 mm时,可获得0.29 g g(-1)葡萄糖的最佳产品产量。颗粒内部的氧转移限制是导致截留的多糖形成的原因。在最佳颗粒大小为12.3 mm时,最大包埋的SPG产量(包埋的Yp / s)为0.88 g g(-1)葡萄糖。 (c)2005年化学工业协会。

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