Preparation method and application for immobilized microorganism flocculant

A technology of immobilizing microorganisms and flocculants, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of inability to recycle, reduce flocculation rate, and difficult to remove, and achieve good flocculation effect, less dosage, and flocculation activity. high effect

Inactive Publication Date: 2012-07-18
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these kinds of chemical coagulants introduce a large amount of ions, which cause secondary pollution and are not easy to remove. They are harmful to the human body after drinking, are prone to desorption, and the flocculation rate is reduced. Second use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add sodium alginate (SA), gelatin and polyvinyl alcohol (PVA) each containing 1g to 100mL distilled water, heat and dissolve in a water bath, after cooling, add 5g Geotrichum candidum, stir evenly, put it into a syringe and drop into the pre-prepared 0.1 mol / L CaCl 2 The solution was left to stand for 4 hours, filtered and washed to make immobilized pellets, namely microbial flocculants, and placed in a sand preservation medium at -4°C for storage for later use. Observation shows that the immobilizing agent has good ball forming property, the immobilized balls are uniform in size, the diameter is about 2-4 mm, the mechanical properties are strong, and the stability is high.

[0011] Take 0.8 g of prepared immobilized balls and add them to 200 mL of Taiyuan underground karst water (hardness is 3044 mg / L, salinity is 3643 mg / L), stir at room temperature for 60 min, filter, and measure the hardness of karst water by flame atomic absorption method. The hardness decreased t...

Embodiment 2

[0013] Add 2g of sodium alginate (SA), 1.5g of gelatin and 1.5g of polyvinyl alcohol (PVA) to 100mL of distilled water, heat and dissolve in a water bath, after the solution is cooled, add 3g of Geotrichum candidum, stir evenly, put it into a syringe and drop into the pre-prepared Good 0.15 mol / L CaCl 2 In the solution, let it stand for 3 hours, filter and wash with suction, make immobilized pellets and store them in sandblasting medium at -4°C for future use. Observation shows that the immobilizing agent has good ball forming property, the immobilized balls are uniform in size, the diameter is about 2-4 mm, the mechanical properties are strong, and the stability is high.

[0014] Take 0.8 g of prepared immobilized balls and add them to 200 mL of underground karst water in Taiyuan City (hardness 3044 mg / L and salinity 3643 mg / L), stir at room temperature for 60 min, filter, and use flame atomic absorption spectrometer to measure the hardness of karst water. The hardness decre...

Embodiment 3

[0016] Add 1.5g of sodium alginate (SA), 0.5g of gelatin and 0.5g of polyvinyl alcohol (PVA) to 100mL of distilled water and heat to dissolve in a water bath. Prepared 0.1 mol / L CaCl 2 In the solution, let it stand for 5 hours, filter and wash with suction, make immobilized pellets and store them in sandblasting medium at -4°C for future use. Observation shows that the immobilizing agent has good ball forming property, the immobilized balls are uniform in size, the diameter is about 2-4mm, the mechanical properties are strong, and the stability is high.

[0017] Take 0.8 g of prepared immobilized balls and add them to 200 mL of underground karst water in Taiyuan City (hardness 3044 mg / L and salinity 3643 mg / L), stir at room temperature for 60 min, filter, and use flame atomic absorption spectrometer to measure the hardness of karst water. The hardness decreased to 1014.5 mg / L; the degree of salinity was measured by conductivity meter method, and the degree of mineralization d...

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Abstract

The invention provides a preparation method and application for immobilized microorganism flocculant. The preparation method comprises the following steps: preparing aqueous solution containing 0.5-2% of sodium alginate, 0.5-1.5% of polyvinyl alcohol and 0.5-1.5% of gelatin according to the mass concentration; after the mixture is fully dissolved, adding Geotrichum candidum to ensure that the Geotrichum candidum accounts for 3-6wt% of the solution; evenly stirring; dripping into 0.05-0.15mol/L of CaCl2 solution prepared in advance; standing for 3-5h; and carrying out suction filtering and washing to obtain the immobilized microorganism flocculant. The immobilized microorganism flocculant has the advantages of high flocculation activity, small use amount, no secondary pollution and the like when being used for treating water, the mineralization flocculation rate for the underground karst water is about 70%, and the maximum hardness flocculation rate can be about 60%.

Description

technical field [0001] The invention relates to a method for treating water with microorganisms, in particular to a preparation method of an immobilized microbial flocculant and the application of the immobilized microbial flocculant in water treatment. Background technique [0002] At present, most water plants use conventional coagulants, mainly in the following categories: (1) low-molecular inorganic coagulants, such as aluminum chloride hexahydrate; (2) inorganic polymer flocculants; (3) organic polymer coagulants (4) Composite coagulant, such as the recently emerging composite flocculant——a self-made ternary composite flocculant made of chitosan chelated with activated carbon and chitosan. However, these kinds of chemical coagulants introduce a large amount of ions, which cause secondary pollution and are not easy to remove. They are harmful to the human body after drinking, are prone to desorption, and the flocculation rate is reduced. time use. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/54
Inventor 郭彦涵王兰张晓峰李宝珍李佳悦
Owner SHANXI UNIV
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