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New lactic acid fermentation technology

A technology of lactic acid fermentation and a new process, applied in the direction of fermentation, etc., can solve the problems of long fermentation period, unstable quality, low conversion rate, etc., and achieve the effects of short fermentation period, good lactic acid purity and high acid production rate

Inactive Publication Date: 2015-02-04
陈丽
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, low PH value requires high equipment. Most manufacturers use stainless steel SUS304, and some manufacturers even use SUS316L, which increases the input cost; , low purity of lactic acid, low acid production (less than 12%), low conversion rate, resulting in high cost
At the same time, the addition of too much nitrogen in the traditional process medium (such as a large amount of corn steeple 6% and yeast powder 4%) leads to difficulty in extraction, dark color of the finished product, and unstable quality

Method used

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Examples

Experimental program
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Embodiment Construction

[0006] Example: First, an appropriate amount of rice is crushed, then the rice is liquefied and saccharified by a specific process, and trace amino acids are added, placed in a carbon steel tank and fermented. During the fermentation process, an appropriate amount of calcium hydroxide is evenly added, so that the pH value of the solution is controlled at 6.0-7.0. At the same time, due to the addition of calcium hydroxide to enhance the mobility of the reactants, through the change of the medium, the bacteria can obtain the best growth conditions and further shorten the cycle (about 30 hours); after repeated mutagenesis, the high temperature resistance / high acid production / Adapt to strains with near-neutral pH value, the acid production rate is above 15%; calcium hydroxide solution is used as an additive to control the pH around 7.0, and carbon steel tanks are used as fermentation tanks, and the purity of lactic acid produced can reach 99% above.

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Abstract

The invention relates to a new lactic acid fermentation technology which is suitable for the fermentation of fruits of plants, and belongs to the technical field of biological chemical engineering. The new lactic acid fermentation technology is as follows: grinding rice, liquefying the rice, saccharifying the rice, adding trace amino acids into a carbon steel tank for fermentation, and is characterized in that: proper amount of calcium hydroxide is added online in the fermentation process, the pH value of the proper amount of calcium hydroxide solution is 6-7, and a reaction container is the carbon steel tank. The new lactic acid fermentation technology has the advantages of short fermentation period, high rate of lactic acid production, good purity and the like.

Description

technical field [0001] The invention relates to a new process for fermenting lactic acid, which is suitable for fermenting plant fruits and belongs to the technical field of biochemical industry. Background technique [0002] Traditional lactic acid fermentation mostly uses regular addition of calcium carbonate as a neutralizer to control fermentation, and most of them use the form of pre-adding excess calcium carbonate. During this period, the metabolized products make the fermentation pH low, and the pH value is usually below 5.0 . On the one hand, low PH value requires high equipment. Most manufacturers use stainless steel SUS304, and some manufacturers even use SUS316L, which increases the input cost; , The purity of lactic acid is low, the acid production is low (below 12%), and the conversion rate is low, resulting in high cost. At the same time, the addition of too much nitrogen in the traditional process medium (such as a large amount of corn steeple 6% and yeast p...

Claims

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Application Information

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IPC IPC(8): C12P7/56
CPCC12P7/56
Inventor 不公告发明人
Owner 陈丽
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