Sewage dephosphorizing agent, preparation method and application thereof

A phosphorus removal agent and sewage technology, which is used in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems that restrict the application of chemical phosphorus removal method, poor phosphorus removal effect, and high phosphorus removal cost. problem, to achieve the effect of small dosage, rapid reaction and high phosphorus removal efficiency

Inactive Publication Date: 2020-06-19
内蒙古信尚环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used chemical phosphorus removal agents mainly include polyferric sulfate, polyaluminum chloride, and polyaluminum ferric chloride. These products have disadvantages such as large dosage, poor phosphorus removal effect, and high phosphorus removal cost, which seriously restrict Application of Chemical Phosphorus Removal

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  • Sewage dephosphorizing agent, preparation method and application thereof
  • Sewage dephosphorizing agent, preparation method and application thereof
  • Sewage dephosphorizing agent, preparation method and application thereof

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preparation example Construction

[0039] The present invention also provides a kind of preparation method of above-mentioned sewage dephosphorization agent, comprises the following steps:

[0040] A) stirring and mixing polyacrylamide, sodium acetate and water to obtain the first mixed solution;

[0041] B) stirring and mixing the first mixed solution with the aluminum salt and the iron salt to obtain a second mixed solution;

[0042] C) stirring and mixing the second mixed solution with absolute ethanol, after hydrothermal reaction, drying to obtain a phosphorus removal agent for sewage.

[0043] In the present invention, the polyacrylamide, sodium acetate and water are first stirred and mixed to obtain the first mixed solution. In some embodiments of the present invention, polyacrylamide, sodium acetate solid and deionized water are stirred and mixed to obtain a first mixed solution.

[0044] In the present invention, the weight average molecular weight of the polyacrylamide is preferably 8 million to 16 m...

Embodiment 1

[0071] Put polyacrylamide and sodium acetate solids with a weight average molecular weight of 8 million in the reaction vessel, the mass ratio of the polyacrylamide and sodium acetate is 0.1:0.2, then add deionized water to the reaction vessel, the The mass ratio of the deionized water to the polyacrylamide and sodium acetate was 40:1, and the polyacrylamide and sodium acetate solids were completely dissolved by stirring to obtain a first mixed solution.

[0072] Add aluminum sulfate octadecahydrate and ferric chloride hexahydrate into the first mixed solution, stir and mix to obtain the second mixed solution. The mass ratio of the aluminum sulfate octadecahydrate to the first mixed solution is 8:100, and the mass ratio of the ferric chloride hexahydrate to the first mixed solution is 5:100. The mass ratio of the aluminum sulfate octadecahydrate to the polyacrylamide is 8:0.5.

[0073] Add anhydrous ethanol to the second mixed solution, stir and mix for 0.5 h, hydrothermally ...

Embodiment 2

[0075] Put polyacrylamide and sodium acetate solids with a weight average molecular weight of 12 million in the reaction vessel, the mass ratio of the polyacrylamide and sodium acetate is 0.4:0.5, then add deionized water to the reaction vessel, the The mass ratio of the deionized water to the polyacrylamide and sodium acetate was 40:1, and the polyacrylamide and sodium acetate solids were completely dissolved by stirring to obtain a first mixed solution.

[0076] Add aluminum sulfate and ferric chloride into the first mixed solution, stir and mix to obtain the second mixed solution. The mass ratio of the aluminum sulfate to the first mixed solution is 15:100, and the mass ratio of the ferric chloride to the first mixed solution is 7.5:100. The mass ratio of the aluminum sulfate to the polyacrylamide is 15:0.5.

[0077] Add anhydrous ethanol to the second mixed solution, stir and mix for 0.8h, hydrothermally react at 100°C for 4h, cool naturally to room temperature, filter to...

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Abstract

The invention provides a sewage dephosphorizing agent, a preparation method and application thereof. The sewage dephosphorizing agent comprises a substrate containing polyacrylamide, and an aluminum salt and an iron salt which are loaded on the substrate, wherein the aluminum salt is selected from hydrated aluminum sulfate or aluminum sulfate, and the iron salt is selected from ferric chloride hydrate or ferric chloride. The sewage dephosphorizing agent provided by the invention can effectively treat phosphorus-containing sewage, has high dephosphorizing efficiency, can also effectively reducethe COD value in water and remove nitrogen in the water, can be widely applied to the fields of industrial wastewater treatment, domestic wastewater treatment and the like, and is convenient to use,small in dosage and rapid in reaction. The experiment results show that when the total phosphorus (TP) in raw water is 7.5 mg / L and the total nitrogen (TN) in the raw water is 88.5 mg / L, the removal rate of the TP is not lower than 87.05% and the removal rate of the TN is not lower than 83.02% by adding the sewage dephosphorizing agent with the concentration of 60 mg / L.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage phosphorus removal agent, its preparation method and application. Background technique [0002] With the increasing shortage of water resources, phosphorus-containing wastewater has gradually attracted people's attention. At present, the phosphorus removal methods at home and abroad are mainly biological and chemical methods. The traditional process uses an economical biological method for phosphorus removal. Due to poor stability during operation, the removal effect is greatly affected by seasonal and water quality changes. Therefore, total phosphorus (TP) often exceeds the standard in effluent water quality monitoring. Chemical phosphorus removal mainly uses phosphorus removal agent, which has the characteristics of high efficiency, low cost and stable operation. [0003] With the gradual increase of national environmental protection efforts, the effluent re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
CPCC02F1/00
Inventor 王康康高蒙园
Owner 内蒙古信尚环保科技有限公司
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