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Magnetic cationized biological flocculant and preparation method thereof

A biological flocculant and cationization technology, applied in the field of water treatment, can solve the problems of limited application scope, large dosage of magnetic powder and high economic cost, and achieve the effect of simplifying the flocculation process, reducing the content and reducing the secondary pollution.

Active Publication Date: 2022-08-09
华能陇东能源有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional magnetic flocculation process is mainly to add flocculants and magnetic powders separately, and to remove pollutants through the joint action of the two. Directly adding unmodified magnetic powders to water samples will result in large dosages of magnetic powders, low utilization efficiency, and Many problems such as high economic cost and limited application range

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0025] The preparation method of the magnetic cationized biological flocculant of the present invention is:

[0026] Mix glycidyl trimethyl ammonium chloride and NaOH solution evenly, react for 10 minutes, then add a biological flocculant (glycoprotein microbial flocculant), and stir rapidly at room temperature for 1.5 to 2 hours at a speed of about 80 r / min, so that well mixed. Then, after reacting at 80-90° C. for 2-4 hours, water is added to the reaction mixture until it is completely dissolved, and then anhydrous ethanol is added for extraction, and the volume ratio of anhydrous ethanol extraction is 1:3-5. The precipitate is separated out, centrifuged, the supernatant is discarded, and the precipitate is dried to obtain a cationized glycoprotein microbial flocculant.

[0027] Wherein, the molar ratio of glycidyl trimethyl ammonium chloride and NaOH is 1:(1-1.6), and the concentration of NaOH solution is 1 mol / L. The corresponding glycidyl trimethyl ammonium chloride per...

Embodiment 1

[0032] Step 1, cationic modification of glycoprotein microbial flocculants:

[0033] Mix 0.015mol glycidyl trimethyl ammonium chloride and NaOH solution with a concentration of 1 mol / L according to the glycidyl trimethyl ammonium chloride and NaOH molar ratio of 1:1.2, and stir for 10 minutes to fully mix, After the reaction, 10 g of pure glycoprotein microbial flocculant was added. The mixture was stirred at room temperature at 80 r / mim for 2 hours and fully mixed, and then placed in a thermostat to react at 80° C. for 3 hours to obtain a mixture of cationized glycoprotein microbial flocculants.

[0034] Step 2, purification of cationized glycoprotein microbial flocculants:

[0035] The mixture obtained in the above steps was completely dissolved in 10 mL of deionized water, then 30 mL of anhydrous ethanol was added to precipitate the precipitate, filtered, the precipitate was repeatedly washed three times, the supernatant was discarded, and the precipitate was retained. Af...

Embodiment 2

[0058] Step 1, cationic modification of glycoprotein microbial flocculants:

[0059] Mix 0.01 mol of glycidyl trimethyl ammonium chloride and a NaOH solution with a concentration of 1 mol / L according to the 1:1 molar ratio of glycidyl trimethyl ammonium chloride and NaOH, and stir for 10 minutes to fully mix, After the reaction, 10 g of glycoprotein microbial flocculant was added. The mixture was stirred at room temperature at 80 r / mim for 2 hours and fully mixed, and then placed in a thermostat to react at 90° C. for 2 hours to obtain a mixture of cationized glycoprotein microbial flocculants.

[0060] Step 2, purification of cationized glycoprotein microbial flocculants:

[0061] The mixture obtained in the above steps was completely dissolved in 10 mL of deionized water, then 30 mL of anhydrous ethanol was added to precipitate the precipitate, filtered, the precipitate was repeatedly washed three times, the supernatant was discarded, and the precipitate was retained. Afte...

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PUM

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Abstract

The invention discloses a magnetic cationized biological flocculant and a preparation method thereof, and the preparation method comprises the following steps: adding a cationized biological flocculant into a FeCl3 solution, uniformly stirring to obtain nano magnetic powder, and reacting to obtain a glycoprotein flocculant-Fe compound; and adding the glycoprotein flocculant-Fe compound into an absolute ethyl alcohol solution containing a cross-linking agent, and carrying out a cross-linking reaction to obtain the magnetic cationized biological flocculant. The prepared flocculant has magnetic separation performance and adsorption and flocculation performance of protein macromolecules at the same time, the interior of the flocculant is of a porous structure, the flocculant has more action sites beneficial to adsorption, and efficient separation and rapid sedimentation can be achieved on the premise that the flocculation effect is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a magnetic cationized biological flocculant and a preparation method thereof. Background technique [0002] Microbial flocculants are a class of metabolites produced by microorganisms with flocculation activity. It has become a research hotspot because of its high efficiency, non-toxicity, no secondary pollution and wide range of uses. Substances with flocculation activity secreted directly by microorganisms are negatively charged, usually requiring Ca 2+ , Mg 2+ It is used as a coagulant such as cationic or polyaluminum chloride to improve the efficiency and activity of its water treatment. This will result in higher residual Ca in the settled sludge and treated water samples 2+ , Mg 2+ or Al 3+ , it is easy to cause secondary pollution, and the application must be added separately with the coagulant, resulting in cumbersome operation steps. Cationic modification of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/48C02F1/52C02F1/56
CPCC02F1/56C02F1/488C02F1/5236Y02W10/10
Inventor 白小元林莹莹吴有兵叶治安李甲伟徐兆郢邢文斌康少鑫吴建安霍敏艳叶茂
Owner 华能陇东能源有限责任公司
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