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标题：Citric acid production by Aspergillus niger from sugarcane bagasse with vinasse at different bed heights in packed-bed column
其他标题：Citric acid production by Aspergillus niger from sugarcane bagasse with vinasse at different bed heights in packed-bed column
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作者：Dayane Vanessa Morais ; Reinaldo Gaspar Bastos
期刊名称：AMBIÊNCIA
印刷版ISSN：2175-9405
出版年度：2019
卷号：15
期号：2
页码：366-373
出版社：Universidade Estadual do Centro-Oeste do Paraná, UNICENTRO
摘要：Solid-state cultivation (SSC) is the growth of microorganisms on solid supports in the absence or near absence of free water. Sugarcane bagasse and vinasse are generated abundantly in Brazil as byproducts from the ethanol industry, and bagasse has been used as solid matrix for SSC to produce a variety of bioproducts. The present study aimed to evaluate the SSC of Aspergillus niger on sugarcane bagasse impregnated with vinasse, with airflow rate and column bed height as scale-up criteria. Airflow rate of 0.8 L min-1 caused a citric acid productivity of 3.77 mg (L.h)-1 and a yield of 0.73 g g-1 at 100 mm bed height. On the other hand, an airflow rate of 3 L min-1 resulted in a productivity of 8.46 mg (L.h)-1 with 2.26 g g-1 of citric acid at 200 mm, and an estimated specific oxygen consumption rate of 0.008 mg per mg of biomass per hour.
关键词：citric acid;bagasse;vinasse;solid-state cultivation