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Green flocculant for sewage treatment

A sewage treatment and flocculant technology, applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as limited molecular weight, high price, loss of flocculation activity, etc.

Inactive Publication Date: 2018-08-14
谢保全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural polymer flocculants have the characteristics of safety, non-toxicity, easy biodegradation, no secondary pollution or waste treatment and environmental friendliness, but traditional natural polymer flocculants have limited molecular weight, low surface charge, poor flocculation effect, and Easy to biodegrade and lose flocculation activity, and expensive, so it has not been widely used in water treatment

Method used

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  • Green flocculant for sewage treatment
  • Green flocculant for sewage treatment
  • Green flocculant for sewage treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Preparation of carboxymethyl starch grafted acrylamide copolymer: in parts by weight, add 2 parts of carboxymethyl starch to 70 parts of deionized water, heat to 85° C., and keep stirring under nitrogen protection for gelatinization for 1 hour. Cooling; add the initiator potassium persulfate afterwards, the initiator concentration is 5.5×10 4 mol / L; then add 9 parts of monomeric acrylamide, at 50°C, the reaction time is 4 hours, after the reaction, wash the product with absolute ethanol, and dry the product under reduced pressure to constant weight.

Embodiment 2

[0052] Preparation of carboxymethyl starch grafted acrylamide copolymer: in parts by weight, add 1 part of carboxymethyl starch to 90 parts of deionized water, heat to 90°C, and continuously stir for gelatinization under nitrogen protection for 0.5h , cooling; then add the initiator potassium persulfate, the initiator concentration is 4.25 × 10 4 mol / L; then add 3 parts of monomeric acrylamide, at 45°C, the reaction time is 1 hour, after the reaction, wash the product with absolute ethanol, and dry the product under reduced pressure to constant weight.

Embodiment 3

[0054] Preparation of carboxymethyl starch grafted acrylamide copolymer: in parts by weight, add 2.5 parts of carboxymethyl starch to 80 parts of deionized water, heat to 70°C, and keep stirring under nitrogen protection for 1.5 hours of gelatinization , cooling; then add the initiator potassium persulfate, the initiator concentration is 6.80×10 4 mol / L; then add 5 parts of monomeric acrylamide, at 65°C, the reaction time is 6 hours, after the reaction, wash the product with absolute ethanol, and dry the product under reduced pressure to constant weight.

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Abstract

The invention relates to a green flocculant for sewage treatment, which is prepared from the following components: 40 to 70 parts of carboxymethyl starch grafted acrylamide copolymer, 10 to 20 parts of chitosan, 3 to 10 parts of dandelion extract, 1 to 10 parts of purslane extract, 1 to 10 parts of Artemisia stelleriana extract, 1 to 10 parts of bitter herb extract, 0 to 10 parts of Chenopodium album Linn extract, 0 to 10 parts of plantain extract, and 0 to 10 parts of madder root extract. The preparation method comprises the steps of preparing a carboxymethyl starch grafted acrylamide copolymer, preparing a wild plant extract, mixing raw materials, and then ball milling and drying. The flocculant provided by the invention has the advantages that the starch is modified and then grafted with acrylamide to enhance the flocculation ability, and then the plant extracts and chitosan are compounded, thereby greatly improving the flocculation ability and also inhibiting bacteria and sterilizing at the same time; the flocculant is safe, non-toxic and residue-free, low in cost and easy to promote.

Description

technical field [0001] The invention relates to a flocculant, in particular to a green flocculant for sewage treatment. Background technique [0002] Water is the most important substance in human production and life. With the continuous development of industry, the use of water resources has also increased, but there is less than 1% of fresh water on the earth, and only about 0.007% of the water can be directly used by humans. In recent years, with the rapid development of industry At the same time, the continuous improvement of people's material living standards has also put forward higher requirements for water quality. The safety and security of water sources has long attracted the attention of environmental protection departments in various countries, and a series of strong safeguard measures including legislation have been adopted. However, judging from the current situation of water source pollution and water purification treatment methods, we still face opportuniti...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/54C02F1/50C08F251/00C08F220/56
CPCC02F1/50C02F1/5263C02F1/54C02F1/56C02F2303/04C08F251/00C08F220/56
Inventor 王建玲
Owner 谢保全
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