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Device and method for inhibiting growth of microorganisms in xylose liquid

A technology of microbes and xylose, applied in sugar production, sugar production, food science, etc., can solve problems such as mixing xylose crystal products, affecting product purity, and production accidents

Active Publication Date: 2014-01-08
SHANDONG FUTASTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The massive growth of microorganisms has a great impact on the subsequent production. If the microorganisms enter the downstream process and finally go through the crystallization and centrifugation steps, they are easy to be mixed into the xylose crystal product, affecting the purity of the product and causing production accidents

Method used

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  • Device and method for inhibiting growth of microorganisms in xylose liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] As shown in the figure, the two openings at the upper end of the plate heat exchanger 2 are the feed liquid inlet 2 and the heat source inlet respectively, and the two openings at the lower end are the heat source outlet and the feed liquid outlet respectively; the heat source flow control solenoid valve 1 is set at the heat source inlet; the temporary storage tank Manhole 7 and ventilation hole 8 are arranged at the upper end of 10, and the ultrafiltration membrane is built in the ventilation hole 8, and the feeding port 13, the discharging port 17, the eyepiece 15, the pH meter 14, the thermocouple 16, and the temporary storage tank 10 are arranged at the lower end of the temporary storage tank 10. Insulation material 9 is arranged on the outer periphery, and a floating device is arranged inside the temporary storage tank 10. The floating device is composed of a supporting part and a sealing part. The supporting part is a conical plate, which is spliced ​​by 12 fan-shap...

Embodiment 2

[0023] The heat exchanger is a shell-and-tube heat exchanger, and the heat source used is fresh steam. After the feed liquid passes through the heat exchanger, the temperature rises to 50 °C. The addition of acetic acid is controlled by the pH control PID module 6, so that the pH of the material liquid is between 4-5, and the pH of the material at the outlet of the temporary storage tank is 4.25-4.70. The light transmittance at 420 nm is above 99%. Observed through the eyepiece, no microbial growth.

Embodiment 3

[0025] The pH of the feed solution is 4.5-5, the temperature is 20°C, and the light transmittance at 420 nm detected by a spectrophotometer is above 99.5%. The heat source inlet temperature of the plate heat exchanger is 85 °C, and the temperature of the feed liquid rises to 55 °C after passing through the heat exchanger. The pH of the material at the outlet of the temporary storage tank is 4.20-4.70. The light transmittance at 420 nm is above 98.5%. Observed through the eyepiece, no microbial growth.

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Abstract

The invention provides a device and a method for inhibiting growth of microorganisms in xylose liquid. The device mainly comprises a heat exchanger, a PID (proportion, integration and differentiation) module and a temporary storage tank. A manhole and an air hole are formed in the upper end of the temporary storage tank, an ultrafiltration membrane is arranged in the air hole, a feed inlet and a discharge outlet are formed in the lower end of the temporary storage tank, an eye lens, a pH (potential of hydrogen) meter and a thermocouple are arranged at the lower end of the temporary storage tank, and a heat-insulation material is arranged on the periphery of the temporary storage tank. The method is implemented by the aid of the device and includes heating the xylose liquid by the heat exchanger until the temperature of the xylose liquid ranges from 40 DEG C to 90 DEG C; leading the heated xylose liquid into the temporary storage tank for standby application; controlling the adding quantity of pH conditioning agents by the pH control PID module and controlling the pH of the xylose liquid to range from 4 to 7. The device and the method have the advantages that the temperature of xylose production purification liquid can be controlled, the xylose production purification liquid is isolated from air, and a pH value of the xylose production purification liquid is controlled, so that growth of the microorganisms can be inhibited; the device is simple in operation and low in cost, and an effective microorganism growth inhibiting or killing effect can be realized for the xylose production purification liquid.

Description

technical field [0001] The invention belongs to the field of functional sugar production, and in particular relates to a device and method for inhibiting the growth of microorganisms in xylose liquid. Background technique [0002] Xylose is a widely used high value-added chemical, which is widely used in food, medicine and other fields, mainly for the production of xylitol. Xylose is mainly obtained by hydrolyzing hemicellulose plant raw materials containing pentosan, and the feed liquid obtained from hydrolysis is accompanied by substances such as protein and glucose. China is a big producer and exporter of xylose and xylitol. At present, the relatively mature xylose production process is: hydrolysis-decolorization-purification-concentration-crystallization-finished product. The purification process mainly relies on ion exchange resin or electrodialysis to remove most of the inorganic salts, pigments, macromolecular substances and other impurities, and adjust the temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
Inventor 孙鲁罗希韬李林邱学良黄伟红姜希生
Owner SHANDONG FUTASTE
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