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Method for producing calcium sulfate whiskers by using high-chlorine wastewater generated in bone gelatin production

A calcium sulfate whisker, high chloride technology, applied in chemical instruments and methods, single crystal growth, crystal growth and other directions, can solve the problems of microbial death, cell water loss, plasmolysis, etc., to achieve simple process and ease mining. Effects of pressure, short cycles

Active Publication Date: 2021-07-02
NINGXIA XINHAOYUAN BIOLOGICAL POLYTRON TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the concentration of chloride ions in the aqueous solution is above 5000 mg / L, the osmotic pressure will increase to about 10-30 atmospheric pressure. Loss of water leads to plasmolysis, and in severe cases, microorganisms die

Method used

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  • Method for producing calcium sulfate whiskers by using high-chlorine wastewater generated in bone gelatin production
  • Method for producing calcium sulfate whiskers by using high-chlorine wastewater generated in bone gelatin production
  • Method for producing calcium sulfate whiskers by using high-chlorine wastewater generated in bone gelatin production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1. the method for the production of calcium sulfate whiskers from high-chloride waste water

[0041] 1) Take 37.5L of high-chloride waste water and pour it into a bucket, add 750ml of lime milk (specific gravity 1.18) to adjust the pH value to 7.0, and obtain the liquid to be treated;

[0042] 2) Add 180 ml of flocculant PAC (10%) to the liquid to be treated in step 1), stir for 5 s, add 18 ml of flocculant PAM (0.1%), and stir for 10 s to obtain flocculant;

[0043] 3) filter the flocculation liquid in step 2) with a 300-mesh filter bag, and collect the flocculation filtrate;

[0044] 4) Filter the flocculation filtrate collected in step 3) with a 2KD-3KD organic membrane device, collect 34L of filtrate, and detect COD2045ppm and calcium chloride content of 61.1g / L

[0045] 5) Take 1000ml of the clear liquid collected in step 4) and put it in a 2000ml beaker and heat it to boil on an electric furnace. The measured temperature is 92°C. Cover the beaker with a ...

Embodiment 2

[0051] Embodiment 2. The method for producing calcium sulfate whiskers from high-chloride waste water.

[0052] It is different from Example 1 in that it directly enters the next step without going through the aging process.

[0053] 1) Take 1000ml of the clear liquid collected in step 4) of Example 1 in a 2000ml beaker and heat it to boil on an electric furnace. The measured temperature is 92°C. Cover the beaker with a rubber plate and leave a feeding hole. Add 19ml of 96% sulfuric acid solution, heat and react to obtain a salt solution containing calcium sulfate;

[0054] 2) The calcium sulfate salt solution obtained in step 1) is directly filtered with a suction filter bottle, and about 1000ml of the clear liquid is collected, which can be recycled (soaked in bone meal), and the hydrochloric acid content is detected to be 3.72%; the obtained crystals are washed with 300ml of clear water at 50°C Two times, 150ml each time; after drying, dry the crystals in an oven at 105°C ...

Embodiment 3

[0056] Embodiment 3. the method for the production of calcium sulfate whiskers from high-chloride waste water

[0057] 1) Get 1000ml of high-chloride waste water and pour it into a 2000ml beaker, add 20ml of milk of lime (specific gravity 1.18) to adjust the pH value to 7.0, and obtain the liquid to be treated;

[0058] 2) Add 5 ml of flocculant PAC (10%) to the liquid to be treated in step 1), stir for 5 seconds, add 0.5 ml of flocculant PAM (0.1%), and stir for 10 seconds to obtain flocculant;

[0059] 3) filter the flocculation liquid in step 2) with a 300-mesh filter bag, and collect the flocculation filtrate;

[0060] Detect COD1989ppm, calcium chloride content is 61.9g / L

[0061] 4) The flocculated filtrate collected in step 3) was heated and boiled on an electric furnace, and the measured temperature was 91 ° C. The beaker was covered with a rubber plate and a feeding hole was left, and 19 ml of 96% sulfuric acid solution was slowly added to it under the condition of s...

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Abstract

The invention provides a method for producing calcium sulfate whiskers by using high-chlorine wastewater generated in bone gelatin production, which comprises the following steps: carrying out flocculation and membrane filtration pretreatment on the high-chlorine wastewater to obtain a to-be-treated solution with low COD and calcium chloride content of 60g / L-80g / L, adding a sulfuric acid solution into the to-be-treated solution, and carrying out aging, filtering, washing and drying procedures on a turbid liquid obtained by reaction, and finally obtaining the calcium sulfate dihydrate whisker. Aiming at the problems of high treatment cost, high biochemical treatment difficulty and the like of industrial sewage treatment caused by high-chlorine wastewater generated in the gelatin production process, the method is suitable for recycling the high-chlorine wastewater generated in the gelatin production process, namely, the production mode of the calcium sulfate whiskers is expanded, and the method has the advantages of simple process, high waste utilization rate, energy conservation, environmental protection and the like.

Description

technical field [0001] The invention relates to the field of calcium sulfate whisker production, in particular to a method for producing calcium sulfate whisker by using high-chloride wastewater generated in bone gelatin production. Background technique [0002] The bone gelatin industry has a history of about 200 years. Gelatin is a protein extracted from the connective tissue (skin and bone) of animals. It is a water-soluble, colloidal substance that can freeze. The unique structural characteristics determine that gelatin plays an irreplaceable important role in the fields of food and pharmaceutical packaging (capsule shell, tablet sugar coating). my country's gelatin industry is in a period of rapid development, and the market capacity is also rapidly expanding. With the rapid development of domestic pharmaceutical, capsule, food, health care and cosmetic industries, the demand for gelatin will continue to grow, especially bone gelatin with excellent quality and stable p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/14C30B29/62C30B29/46
CPCC30B7/14C30B29/62C30B29/46
Inventor 文建军刘明璨王欢罗德慧
Owner NINGXIA XINHAOYUAN BIOLOGICAL POLYTRON TECH INC
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