Activated calcium carbonate for increasing acid production rate of fermentation organic acid and preparation method of activated calcium carbonate

A technology of active calcium carbonate and organic acid calcium, applied in the field of microbial fermentation, can solve the problems of large particle size, prolonged fermentation time, weak pH adjustment ability, etc.

Inactive Publication Date: 2016-10-05
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an acid-base regulator in the organic acid fermentation industry, the disadvantages of calcium carbonate produced by the traditional pulverization method are: large particle size, weak pH adjustment ability, irregular shape and high density, which affect the activity and concentration of fermentation cells , so that the rate of acid production decreases and the fermentation time increases
[0004] The production methods of calcium carbonate include carbonization method, double decomposition method, etc., which can produce high-quality calcium carbonate with different particle sizes and shapes, but they are generally used as fillers for rubber, plastics, etc., and are not used in the organic acid fermentation industry. The acid-base regulator, if it is used as an acid-base regulator, the cost is higher

Method used

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  • Activated calcium carbonate for increasing acid production rate of fermentation organic acid and preparation method of activated calcium carbonate
  • Activated calcium carbonate for increasing acid production rate of fermentation organic acid and preparation method of activated calcium carbonate
  • Activated calcium carbonate for increasing acid production rate of fermentation organic acid and preparation method of activated calcium carbonate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057]Preparation of active calcium carbonate to increase the acid production rate of fermented organic acids: Measure 6.6L of fermented liquid with a calcium lactate concentration of 170g / L to remove bacteria, pour it into a fermenter with a volume of 10.0L, and set the temperature to 30°C. The stirring speed is 110r / min; after the temperature is stabilized, add 1350mL of 4.0mol / L ammonium carbonate solution into the preparation container through the feeding system of the fermenter, and seal the preparation container after adding it completely at one time; keep the temperature at 22°C and stir The rotating speed is 110r / min, and after 600min, the reaction is completed; use the method of filtration (with qualitative filter paper as the filter medium) to carry out solid-liquid separation, and the solid obtained is the active calcium carbonate that improves the acid production rate of fermented organic acids, which contains carbonic acid Calcium is about 468g.

[0058] The chara...

Embodiment 2

[0061] Preparation of active calcium carbonate to increase the acid production rate of fermented organic acids: Measure 4.1L of fermented broth with a calcium lactate concentration of 220g / L to remove bacteria, pour it into a fermenter with a volume of 7.0L, and set the temperature to 36°C. The stirring speed is 200r / min; after the temperature is stabilized, add 496g of ammonium carbonate solid, the molar ratio of its carbonate group to calcium ion is 1.2:1.0, then seal the feeding port; keep the temperature at 36°C and the stirring speed at 200r / min, After 30min, the reaction was completed; use the method of filtration (with qualitative filter paper as the filter medium) to carry out solid-liquid separation, and the solid obtained is the active calcium carbonate that improves the acid production rate of fermented organic acids, which contains about 400g of calcium carbonate.

[0062] The characteristics of the active calcium carbonate obtained to improve the acid production ra...

Embodiment 3

[0066] Preparation of active calcium carbonate to improve the acid production rate of fermented organic acids: Measure 4.7L of fermented liquid with a calcium lactate concentration of 190g / L without bacteria removal, and pour it into a fermenter with a volume of 7.0L. This fermenter has two Set the ventilation pipeline, the gas outlet is located at the bottom of the fermentation tank, set the temperature at 30°C, and the stirring speed at 300r / min; after the temperature stabilizes, introduce carbon dioxide gas and ammonia gas at the same time, and use a carbon dioxide mass flow meter to measure the input and discharge of fermentation The amount of gas in the tank is adjusted by pH feedback to adjust the rate of ammonia gas introduction; when the amount of carbon dioxide reacted reaches 4.33mol, stop the introduction of carbon dioxide, use ammonia gas to adjust the pH of the liquid to 8.0, stop ventilation, and react after 60 minutes It took a total of 7 hours to complete; the n...

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Abstract

The invention discloses activated calcium carbonate for increasing the acid production rate of fermentation organic acid and a preparation method of activated calcium carbonate. The preparation method of activated calcium carbonate comprises the following steps that in a fermentation liquor system, organic acid calcium salt reacts with matter containing carbonate and / or bicarbonate radicals, or reacts with matter capable of generating carbonate and / or bicarbonate radicals react, and activated calcium carbonate for increasing the acid production rate of the fermentation organic acid is generated. Particles of prepared activated calcium carbonate are spherical or fusiform, the particle size (D50) ranges from 1 micrometer to 20 micrometers, and the size of crystal nucleuses in the particles ranges from 10 nanometers to 200 nanometers; organonitrogen and polysaccharide matter are contained, activated calcium carbonate serves as an acidity and alkalinity modifier for fermenting organic acid, the acid production rate and the thallus concentration can be increased, and the preparation cost is low.

Description

technical field [0001] The invention belongs to the technical field of microbial fermentation, in particular, the invention relates to an active calcium carbonate for improving the acid production rate of fermented organic acids and a preparation method thereof. Background technique [0002] Calcium carbonate is a commonly used acid-base regulator in the production of organic acid fermentation, and its advantage is that it is cheap and easy to get. In addition, the presence of calcium salts is very beneficial to the accumulation of certain organic acids in the fermentation broth. [0003] At present, the calcium carbonate used in the organic acid fermentation industry is obtained by crushing calcium carbonate-containing ores, such as limestone and marble. As an acid-base regulator in the organic acid fermentation industry, the disadvantages of calcium carbonate produced by the traditional pulverization method are: large particle size, weak pH adjustment ability, irregular s...

Claims

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Application Information

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IPC IPC(8): C12P7/56C12P7/46C12R1/225
Inventor 杨鹏波田原王倩原芳芳丛威
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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