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Phosphorus removal agent with composite function and phosphorus removal method

A compound function, phosphorus removal technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost and large dosage of phosphorus removal agent , to achieve the effect of reducing secondary pollution and improving treatment effect

Active Publication Date: 2021-02-05
神美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dosage of this type of phosphorus removal agent is relatively large, and the cost is relatively high.

Method used

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  • Phosphorus removal agent with composite function and phosphorus removal method
  • Phosphorus removal agent with composite function and phosphorus removal method
  • Phosphorus removal agent with composite function and phosphorus removal method

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preparation example Construction

[0030] According to the preparation method of the dephosphorization agent with composite function described in the present invention, the dephosphorization agent includes reagent A and reagent B, and the method comprises the following steps:

[0031] Preparation of reagent A: Dissolve long-chain amino acids in acidic solution, then add activated chitosan and a certain amount of sodium bicarbonate buffer, stir and react at 50-60°C for 24-30 hours, then concentrate the solution and dialyze Finally, reagent A is obtained; wherein, the activated chitosan is obtained by the following method through the activated chitosan: the chitosan is mixed with a solvent, stirred to fully dissolve the chitosan, Then add N-hydroxysuccinimide aqueous solution and dicyclohexylcarbodiimide alcohol solution to the above-mentioned solution respectively successively, in the above-mentioned reaction system, chitosan: N-hydroxylsuccinimide aqueous solution: dicyclohexylcarbodiimide The molar ratio of th...

Embodiment 1

[0059] Preparation of reagent A: Mix chitosan with methanol, stir to fully dissolve chitosan, then add N-hydroxysuccinimide aqueous solution and dicyclohexylcarbodiimide alcohol solution to the above solution respectively, in the above reaction system Among them, the molar ratio of chitosan: N-hydroxysuccinimide aqueous solution: dicyclohexylcarbodiimide alcohol solution is 1:0.5:1.5, stirred at room temperature for 18h, then filtered, washed the precipitate and dried in vacuum to obtain Activated chitosan. Dissolve 50 parts of long-chain amino acids (n=100) in 50 parts of dilute nitric acid solution (concentration is 20wt%), then add activated chitosan and then add a certain amount of sodium bicarbonate buffer solution, and stir the reaction at 60°C After 24 hours, the solution was concentrated and dialyzed to obtain reagent A.

[0060] Preparation of reagent B: Take 70 parts of composite inorganic flocculant (among them, 35 parts of polyaluminum ferric acid, 21 parts of pol...

Embodiment 2

[0062] Preparation of reagent A: Mix chitosan with water, stir to fully dissolve chitosan, then add N-hydroxysuccinimide aqueous solution and dicyclohexylcarbodiimide alcohol solution to the above solution respectively, in the above reaction system Among them, the molar ratio of chitosan: N-hydroxysuccinimide aqueous solution: dicyclohexylcarbodiimide alcohol solution is 1:0.5:1.5, stirred at room temperature for 18h, then filtered, washed the precipitate and dried in vacuum to obtain Activated chitosan. Dissolve 55 parts of long-chain amino acids (n=30) in 45 parts of dilute nitric acid solution (concentration is 10wt%) solution, then add activated chitosan and then add a certain amount of sodium bicarbonate buffer, stir at 55 ° C After reacting for 28 hours, the solution was concentrated and dialyzed to obtain reagent A.

[0063] Preparation of reagent B: Take 70 parts of composite inorganic flocculant (among them, 35 parts of polyaluminum ferric acid, 21 parts of polyalumi...

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Abstract

The invention discloses a preparation method of a phosphorus removal agent with a composite function. The preparation method comprises the following steps: preparation of a reagent A: dissolving long-chain amino acid in an acidic solution, adding activated chitosan, adding a certain amount of a sodium bicarbonate buffer solution, conducting stirring at 50-60 DEG C for a reaction for 24-30 hours, and concentrating and dialyzing the obtained solution to obtain the reagent A; and preparation of a reagent B: mixing a composite flocculant, an oxidizing agent, a calcium-containing compound and a synergist according to a mass ratio of (6-8): (0.5-1): (0.5-1): (1-2), conducting grinding in a solid stirring and mixing container at normal temperature, performing mixing until a particle size is 50-150 meshes, and carrying out drying for 30 minutes at normal temperature to obtain the reagent B. The invention further discloses a phosphorus removal method. The phosphorus removal agent and the phosphorus removal method are combined for sewage treatment, an obvious removal effect on phosphorus and ammonia nitrogen is achieved, and a removal rate is remarkably increased.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a dephosphorization agent and a dephosphorization method with composite functions. Background technique [0002] With the development of industry and agriculture and the growth of population, the production and consumption of chemical fertilizers, pesticides, and phosphorus-containing detergents have increased rapidly. Water eutrophication caused by water pollution has become increasingly serious. Water eutrophication has endangered agriculture, fishery, and tourism. It also poses a huge threat to drinking water sanitation and food safety. The main nutrients that cause water eutrophication include organic carbon, nitrogen, phosphorus, potassium, etc. Organic carbon in sewage can be basically removed after general biological treatment, and the content of other components other than nitrogen and phosphorus is relatively The demand in the process is extremely l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F101/10C02F101/16
CPCC02F1/56C02F1/5236C02F2101/105C02F2101/16
Inventor 孙松厚朱希坤石伟杰冯春晖周继柱王国瑞张玉华柯建怡沈天曚
Owner 神美科技有限公司