Water saving method in process of producing sodium gluconate through aspergillus niger fermentation

A sodium gluconate and Aspergillus niger fermentation technology, which is applied in the field of industrial biology, can solve the problems of large water resource consumption, and achieve the effects of saving water quality, reducing steam volume, and reducing steam consumption

Active Publication Date: 2015-05-13
SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of large water resource consumption in the existing Aspergillus niger fermentative production of sodium gluconate technology, the purpose of the present invention is to provide a process that can effectively reduce water resource consumption per ton of product in the process of Aspergillus niger fermentative production of sodium gluconate. , water-saving methods to reduce production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: the production technology of aspergillus niger fermentation production sodium gluconate

[0017] Prepare a glucose solution with a concentration of 20-30% (w / v) with fresh water, then add appropriate amount of inorganic salt and other nutrients in proportion (conventional formula), and inoculate the liquid with a volume fraction of 5-12% black Aspergillus liquid seeds are subjected to conventional fermentation. During the fermentation process, 30-40% sodium hydroxide solution is added to control the pH to 5.5-7.0. When the glucose concentration in the feed liquid drops to 0-1g / L, the fermentation is ended to obtain 20-30% (w / v) sodium gluconate fermentation liquid, the fermentation period is 20-30 hours. Sterilize the fermentation broth through plate and frame filtration, decolorize the activated carbon, filter to remove the activated carbon, concentrate the clear liquid through multi-effect evaporation (produce a large amount of condensed water), cool dow...

Embodiment 2

[0018] Embodiment 2: Concentrating and evaporating the fermented liquid containing sodium gluconate, collecting the evaporative condensed water produced in the evaporation process, and implementing reverse osmosis treatment to it

[0019] After fermentation according to the method described in Example 1, the fermented liquid is heated to inactivate the thallus, then the mycelium is removed by plate and frame filtration, the fermentation clear liquid is decolorized by adding activated carbon, the activated carbon is removed by plate and frame filtration, and the clear liquid after decolorization is pumped to The four-effect evaporator concentrates, collects evaporative condensed water, that is, the condensed water generated by the concentration of the feed liquid (including the condensed water generated by heating steam (accounting for 1 / 5 of the total)), and pumps it to the high-temperature resistant reactor produced by GE in the United States. The osmotic membrane Duratherm ST...

Embodiment 3

[0020] Embodiment 3 Fresh water ingredients prepare the fermented liquid of Aspergillus niger fermentation to produce sodium gluconate

[0021] Dissolve an appropriate amount of glucose in fresh water (tap water, water temperature 20-25°C) according to the formula of the fermentation feed liquid, prepare the glucose concentration to 25-26%, and add other inorganic salt auxiliary materials at the same time, the feed liquid temperature is about 15-20°C, Sterilization is carried out by conventional sterilization methods. After cooling down, sodium gluconate production strains are inoculated, and fermentation is carried out according to conventional fermentation control conditions. The fermentation period is 24-27 hours.

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Abstract

The invention discloses a water saving method in the process of producing sodium gluconate through aspergillus niger fermentation. The method comprises the following steps of on the base of the existing processes of producing the sodium gluconate through the aspergillus niger fermentation, concentrating and collecting evaporation condensate water produced in the evaporation concentration process of a fermentation liquor, carrying out reverse osmosis on the evaporation condensate water, respectively recycling pure water and thick water produced after processing and realizing the water conservation. By utilizing the method disclosed by the invention, the usage amount of the ingredient fresh water in the process of producing the sodium gluconate through the aspergillus niger fermentation can be greatly reduced: the usage amount of the fresh water can be reduced by about 50% per ton of products; in the meantime, the temperature of the pure water produced in the reverse osmosis process of the evaporation condensate water is high, so that the steam consumption in the heating sterilization process of feed liquid is reduced by about 20%; low-concentration sewage discharge in the production process is reduced and the green clean production is realized; and therefore, the method is worthy of wide popularization and application.

Description

technical field [0001] The invention relates to a water-saving method in the production of sodium gluconate, in particular to a water-saving method in the process of producing sodium gluconate by fermentation of Aspergillus niger. It belongs to the field of industrial biotechnology. Background technique [0002] Sodium gluconate, also known as sodium pentahydroxycaproate, molecular formula: C 6 h 11 o 7 Na, molecular weight: 218.14, white or light yellow crystalline particles or powder. Very soluble in water, slightly soluble in alcohol, insoluble in ether. It is widely used in construction retarder, pumping agent, medicine, electroplating, food additive, food industry cleaning agent, water quality stabilizer and other fields. [0003] At present, the production methods of sodium gluconate mainly include four methods: biological fermentation, catalytic oxidation, homogeneous chemical oxidation, and electrolytic oxidation, while biological fermentation and catalytic oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/58C12R1/685
Inventor 刘建军赵祥颖董学前田延军韩延雷张家祥
Owner SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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