Method for culturing citric acid fermenting seeds and method for preparing citric acid by fermenting

A technology of fermentation medium and citric acid, which is applied in the field of citric acid fermentation seed culture and citric acid preparation by fermentation, can solve the problems of long fermentation period, long seed age and poor seed quality in the fermentation stage, so as to reduce the seed culture time and Fermentation cycle, mycelium and thickening, the effect of shortening the seed age
CN102864082AActive Publication Date: 2013-01-09COFCO BIOTECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
COFCO BIOTECHNOLOGY CO LTD
Publication Date
2013-01-09

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Abstract

The invention discloses a method for culturing citric acid fermenting seeds. The method includes inoculating citric acid fermenting strains into a seed culture medium of a seed tank for seed culturing to obtain seed liquid. The method for culturing citric acid fermenting seeds is characterized in that pressure of the seed tank, ventilatory capacity and stirring rotation speed are all higher than previous pressure, ventilatory capacity and stirring rotation speed after seed culturing for 10-15 hours. The invention further discloses a method for preparing citric acid by fermenting. The method for preparing citric acid by fermenting includes subjecting the citric acid fermenting strains to seed culturing under the condition of seed culturing, inoculating the seed solution obtained after seed culturing into the fermenting culturing medium to ferment under the condition of generating citric acid so as to obtain fermenting liquid. The method for preparing citric acid by fermenting is characterized in that the citric acid is subjected to seed culturing according to the above method. By the methods, seed age can be shortened, seed quality is improved, fermenting period is shortened, conversion rate and final citric acid content are increased, consumption of power such as water and electricity is reduced and cost is saved.
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Description

technical field

[0001] The invention relates to the technical field of citric acid fermentation, in particular to a method for culturing citric acid fermentation seeds and a method for preparing citric acid by fermentation. Background technique

[0002] Citric acid is one of the most used organic acids in the world today. So far, the citric acid consumed in the world is mainly produced by the fermentation method with Aspergillus niger as the strain.

[0003] Citric acid fermentation production generally includes a seed tank culture stage and a fermenter fermentation stage. In the existing citric acid fermentation production, it is often only focused on the regulation of the fermentation stage of the fermenter, and the control of the seed tank cultivation stage is relatively extensive. Generally, the seed cultivation is only carried out under the conditions of fixed tank pressure, ventilation and stirring speed, for example The cultivation conditions include: temperature 30-...

Claims

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