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Exopolysaccharide sewage treatment flocculant and preparation method thereof

An exopolysaccharide and sewage treatment technology, which is used in water/sewage treatment, water treatment parameter control, water/sludge/sewage treatment, etc. , cell carcinogenesis and other problems, to achieve the effects of good biodegradation performance, rich flocculation forms, and easy preparation

Inactive Publication Date: 2021-09-17
南宁汉和生物科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic flocculation mainly includes iron salts and aluminum salts, which have the advantages of low price and good flocculation effect, but they are used in large quantities, and the long-term use of treated water has great risks such as poisoning, disease treatment and corrosion of devices. Certain limitations, but the organic synthetic high-fraction flocculant is difficult to degrade, which is easy to cause serious environmental problems. At the same time, the monomers of these organic polymer compounds can easily cause cell cancer after entering the human body, which is not conducive to human and living body health.

Method used

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  • Exopolysaccharide sewage treatment flocculant and preparation method thereof
  • Exopolysaccharide sewage treatment flocculant and preparation method thereof
  • Exopolysaccharide sewage treatment flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Microbial exopolysaccharide preparation

[0023] (1) Fermentation reaction medium:

[0024] Sucrose 65g / L; potassium dihydrogen phosphate 5g / L; manganese sulfate 0.03g / L; magnesium sulfate 0.8g / L; ferric nitrate 0.05g / L; calcium chloride 0.3g / L; yeast powder 10g / L; peptone 18g / L; distilled water.

[0025] (2) Preparation of exopolysaccharide by fermentation

[0026] The culture medium was prepared according to the formula ratio of the fermentation reaction medium, and then sterilized at 120°C for 15 minutes to obtain the fermentation reaction medium. Bacillus licheniformis was inoculated into the fermentation reaction medium with an inoculum size of 5%, at 33 ℃, 160rpm shaking culture for 5 days, centrifugation to obtain the fermentation supernatant; dialyze the fermentation supernatant, and then centrifuge to obtain the dialyzed supernatant; filter the dialyzed supernatant, vacuum freeze-dry to obtain the cell exopolysaccharides.

[0027] 2. Preparation of silk...

Embodiment 2

[0042] 1. Microbial exopolysaccharide preparation

[0043] (1) Fermentation reaction medium:

[0044]Sucrose 60g / L; Potassium dihydrogen phosphate 3g / L; Manganese sulfate 0.01g / L; Magnesium sulfate 0.5g / L; Ferric nitrate 0.07g / L; Calcium chloride 0.5g / L; Yeast powder 10g / L; Peptone 18g / L; distilled water.

[0045] (2) Preparation of exopolysaccharide by fermentation

[0046] Prepare the culture medium according to the formula ratio of the fermentation reaction medium, and then carry out sterilizing treatment at 120° C. for 15 minutes to obtain the fermentation reaction medium. Bacillus licheniformis is inoculated into the fermentation reaction medium with an inoculum size of 5%, at 32 ℃, 200rpm shaking culture for 5 days, centrifugation to obtain the fermentation supernatant; dialyze the fermentation supernatant, and then centrifuge to obtain the dialyzed supernatant; filter the dialyzed supernatant, vacuum freeze-dry to obtain the cell exopolysaccharides.

[0047] 2. Pre...

Embodiment 3

[0061] 1. Microbial exopolysaccharide preparation

[0062] (1) Fermentation reaction medium:

[0063] Sucrose 70g / L; Potassium dihydrogen phosphate 6g / L; Manganese sulfate 0.05g / L; Magnesium sulfate 1.0g / L; Ferric nitrate 0.03g / L; Calcium chloride 0.2g / L; Yeast powder 13g / L; Peptone 15g / L; distilled water.

[0064] (2) Preparation of exopolysaccharide by fermentation

[0065] The culture medium was prepared according to the formula ratio of the fermentation reaction medium, and then sterilized at 120°C for 15 minutes to obtain the fermentation reaction medium. Bacillus licheniformis was inoculated into the fermentation reaction medium with an inoculum size of 5%, at 35 ℃, 160rpm shaking culture for 4 days, centrifugation to obtain the fermentation supernatant; dialyze the fermentation supernatant, and then centrifuge to obtain the dialyzed supernatant; filter the dialyzed supernatant, vacuum freeze-dry to obtain the cell exopolysaccharides.

[0066] 2. Preparation of silk...

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Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses an exopolysaccharide sewage treatment flocculant and a preparation method thereof. The sewage treatment flocculant is prepared by respectively grinding and sieving exopolysaccharides, cellulose, sepiolite, activated carbon, tragacanth and silk fibroin powder and then uniformly mixing. The exopolysaccharide sewage treatment flocculant disclosed by the invention is high in removal rate of suspended solids, heavy metals and COD (Chemical Oxygen Demand) in industrial sewage, outstanding and stable in sewage treatment effect, non-toxic, free of secondary pollution, simple in preparation method and easy to produce.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an exopolysaccharide sewage treatment flocculant and a preparation method thereof. Background technique [0002] Water resources play an important role in human production and life, and are indispensable natural resources in the entire biological world. With the development of industrialization, water pollution is becoming more and more serious, posing a serious threat to the healthy development of human beings and other ecological environments. Therefore, The development of sewage treatment technology is of great significance. Flocculation is a method widely used in sewage treatment. It is mainly a sewage treatment technology that forms flocs in sewage by adding a certain flocculant to sewage, and then removes flocs by sedimentation and other methods. . There are many types of flocculants used in the flocculation method, which can be mainly divided into three categori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54C02F1/56
CPCC02F1/5236C02F1/54C02F1/56C02F2209/08
Inventor 陈成余义发梁承
Owner 南宁汉和生物科技股份有限公司
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