Enhancement of citric acid production by immobilized and freely suspended Aspergillus niger using silicone oil

被引：31

作者：

Ates, S ^{[1
]}

Dingil, N

Bayraktar, E

Mehmetoglu, U

机构：

[1] Gazi Univ, Fac Art & Sci, Dept Chem, TR-06500 Ankara, Turkey

[2] Ankara Univ, Fac Engn, Dept Chem Engn, TR-06100 Ankara, Turkey

来源：

PROCESS BIOCHEMISTRY | 2002年 / 38卷 / 03期

关键词：

silicone oil; oxygen vector; citric acid production; A; niger; K4Fe(CN)(6);

D O I：

10.1016/S0032-9592(02)00152-8

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The use of silicone oil as an oxygen vector for increasing citric acid production by free and immobilized Aspergillus niger conidiospores was studied. When silicone oil was used, citric acid concentration increased with respect to the control run in free and immobilized systems 2.0 and 1.6 times, respectively. The effect of potassium ferrocyanide [K4Fe(CN)(6)] on citric acid production in a medium containing air, oxygen and silicone oil was studied. When K4Fe(CN)(6) was used with oxygen and silicone oil, citric acid concentration decreased significantly because of the conversion of ferrocyanide to ferricyanide. The reuse of immobilized A. niger conidiospores was investigated in citric acid production medium containing 2% (v/v) silicone oil. Citric acid production decreased on increasing the reuse number. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：433 / 436

页数：4

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