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Mixed flocculating agent and preparation method thereof

A flocculant and solution technology, which is applied in the field of mixed flocculant and its preparation, can solve the problems of high moisture content of sludge, long flocculation time, high turbidity, etc., and achieve the effects of reduced volume, good physical adsorption capacity, and increased sedimentation speed

Inactive Publication Date: 2019-04-12
ANHUI UNIVERSITY OF ARCHITECTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently used flocculants include natural flocculants and polymeric flocculants. Whether it is a natural flocculant or a polymeric flocculant, the flocculation time is longer, the turbidity is higher, and the moisture content of the sludge after flocculation is higher.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A mixed flocculant, comprising the following composition in parts by weight, 10 parts of sodium carboxymethylcellulose, 5 parts of polyacrylamide, 18 parts of chitosan, 7 parts of polyethyleneimine, 22 parts of caffeic acid, and 48 parts of clay And disodium hydrogen phosphate 6 parts.

[0020] A preparation method of a mixed flocculant, adding 1.8g of chitosan and 1g of sodium carboxymethyl cellulose to 200mL of water in turn, stirring evenly to obtain solution A, adding 0.5g of polyacrylamide, 0.7g of polyethyleneimine, Add 0.6 g of disodium hydrogen phosphate into solution A in sequence, stir evenly and cool to 25°C to obtain solution B, add 2.2 g of caffeic acid and 4.8 g of clay into solution B in sequence, stir with a magnetic stirrer for uniform reaction for 1 hour, put in 120 ℃ oven to obtain solid powder, which is the mixed flocculant.

Embodiment 2

[0022] A mixed flocculant, comprising the following composition in parts by weight, 5 parts of sodium carboxymethylcellulose, 5 parts of polyacrylamide, 8 parts of chitosan, 6 parts of polyethyleneimine, 20 parts of caffeic acid, and 48 parts of clay And disodium hydrogen phosphate 6 parts.

[0023] A preparation method of a mixed flocculant, adding 0.8g of chitosan and 0.5g of sodium carboxymethyl cellulose to 200mL of water in turn, stirring evenly to obtain solution A, mixing 0.5g of polyacrylamide and 0.6g of polyethyleneimine , disodium hydrogen phosphate 0.6g was added to solution A in turn, stirred evenly and then cooled to 20°C to obtain solution B, 2g caffeic acid and 4.8g clay were added to solution B in turn, stirred evenly with a magnetic stirrer for 1h, put in 100 °C in an oven to obtain a solid powder to obtain the mixed flocculant.

Embodiment 3

[0025] A mixed flocculant, comprising the following composition in parts by weight, 5 parts of sodium carboxymethylcellulose, 6 parts of polyacrylamide, 10 parts of chitosan, 6 parts of polyethyleneimine, 12 parts of caffeic acid, and 26 parts of clay And disodium hydrogen phosphate 6 parts.

[0026] A preparation method of a mixed flocculant, adding 1 g of chitosan and 0.5 g of sodium carboxymethyl cellulose to 200 mL of water in sequence, stirring evenly to obtain solution A, mixing 0.6 g of polyacrylamide, 0.6 g of polyethyleneimine, Add 0.6 g of disodium hydrogen phosphate into solution A in turn, stir evenly and cool to 20°C to obtain solution B, add 1.2 g of caffeic acid and 2.6 g of clay into solution B in turn, stir with a magnetic stirrer for 2 hours, put in 110 ℃ oven to obtain solid powder, which is the mixed flocculant.

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PUM

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Abstract

The invention belongs to the technical field of flocculating agent, in particular to a mixed flocculating agent, comprising the following components in parts by weight: 5-15 parts of sodium carboxymethyl cellulose, 3-8 parts of polyacrylamide, 5-20 parts of chitosan, 5-12 parts of polyethyleneimine, 10-30 parts of caffeic acid, 10-50 parts of clay and 5-8 parts of disodium hydrogen phosphate. Theinvention has the beneficial effects that when the mixed flocculating agent prepared by the preparation method of the invention is used for sewage treatment, the moisture content of the sludge after the flocculation is completed is as low as 61.7%, and thus the flocculating agent greatly reduces the volume of the sludge and reduces the processing cost of a subsequent process.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and in particular relates to a mixed flocculant and a preparation method thereof. Background technique [0002] Flocculation and sedimentation can effectively remove suspended solids, heavy metal ions, organic matter and ammonia nitrogen in water, and further purify water quality, and have been widely used in water treatment processes. At present, the discharge scale of urban sewage and waste water is increasing continuously, and the types are increasing continuously. The composition of pollutants in water is becoming more and more complex, and the harm to the environment is becoming more and more serious. Therefore, the difficulty of water treatment is further increased, especially the traditional flocculants can no longer meet the needs of the existing flocculation technology. In addition, a large amount of excess sludge will be produced in the process of urban sewage treatment, and the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F1/54
CPCC02F1/5236C02F1/5263C02F1/54C02F1/56
Inventor 张华黄健黄显怀张勇宋永莲章长江杨奎
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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