Starch-based polymer composite flocculant for sewage treatment and preparation method thereof

A composite flocculant and polymer technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high cost of use and poor effect of wastewater treatment, and achieve the effect of low cost, good decolorization, and no secondary pollution

Inactive Publication Date: 2021-01-08
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the technical problems such as high cost of use and poor effect of treating waste water existing in various flocculants

Method used

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  • Starch-based polymer composite flocculant for sewage treatment and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (a). Potato peels are dried and pulverized and passed through a 100-mesh sieve, and the under-sieve is taken to obtain potato peel powder, and 500g of potato peel powder is added to distilled water to prepare a suspension to obtain a potato peel starch suspension;

[0035] (b). Adding a concentration of 1 mol / L NaOH solution 1L to the potato peel starch suspension prepared in step (a) activates the chemical functional groups of the potato peel powder to obtain solution A;

[0036] (c). Add 50 g of hexamethylenediamine to solution A in step (b) and react at 40°C for 1.5 hours to obtain solution B;

[0037] (d). Add 10 g of cross-linking agent dimethyl diallyl ammonium chloride and 2 g of initiator potassium persulfate to the solution B prepared in step (c), react at 30°C for 2 hours, and then add The total mass of 0.5% polyaluminum chloride is fully stirred evenly and dried to obtain a starch-based polymer composite flocculant product.

Embodiment 2

[0039] (a). Potato peels are dried and pulverized and passed through a 100-mesh sieve, and the under-sieve is taken to obtain potato peel powder, and 500g of potato peel powder is added to distilled water to prepare a suspension to obtain a potato peel starch suspension;

[0040] (b). Adding 0.5L of NaOH solution with a concentration of 2mol / L to the potato peel starch suspension prepared in step (a) to activate the chemical functional groups of the potato peel powder to obtain solution A;

[0041] (c). Add 60 g of hexamethylenediamine to solution A in step (b) and react at 40°C for 1.5 hours to obtain solution B;

[0042] (d). Add 12 g of cross-linking agent dimethyl diallyl ammonium chloride and 2 g of initiator potassium persulfate to the solution B prepared in step (c), react at 30°C for 2 hours, and then add The total mass of 0.5% polyaluminum chloride is fully stirred evenly and dried to obtain a starch-based polymer composite flocculant product.

Embodiment 3

[0044] (a). Potato peels are dried and pulverized and passed through a 100-mesh sieve, and the under-sieve is taken to obtain potato peel powder, and 500g of potato peel powder is added to distilled water to prepare a suspension to obtain a potato peel starch suspension;

[0045] (b). Adding 0.5L of NaOH solution with a concentration of 1mol / L to the potato peel starch suspension prepared in step (a) to activate the chemical functional groups of the potato peel powder to obtain solution A;

[0046] (c). Add 80 g of hexamethylenediamine to solution A in step (b) and react at 40°C for 1.5 hours to obtain solution B;

[0047] (d). Add 20 g of cross-linking agent dimethyl diallyl ammonium chloride and 2 g of initiator potassium persulfate to solution B prepared in step (c), react at 30°C for 2 hours, and then add The total mass of 0.5% polyaluminum chloride is fully stirred evenly and dried to obtain a starch-based polymer composite flocculant product.

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Abstract

The invention relates to the technical field of polymer flocculant materials for sewage treatment, in particular to a starch-based polymer composite flocculant and a preparation method thereof. The preparation method of the composite flocculant comprises the following steps: drying potato peels in the sun and crushing the potato peels to obtain potato peel powder, adding distilled water to preparea turbid liquid, and adding a NaOH solution to activate chemical functional groups of the potato peel powder to obtain a solution A; adding hexamethylenediamine into the solution A, and conducting reacting at 40-60 DEG C for 1-2 hours to obtain a solution B; and adding a cross-linking agent dimethyl diallyl ammonium chloride and an initiator potassium persulfate into the solution B, conducting reacting at 30-60 DEG C for 2-3 hours, adding polyaluminium chloride accounting for 0.5-2% of the total mass of the system, and carrying out sufficient and uniform stirring to obtain a starch-based polymer composite flocculant product. The potato peel is used as a raw material and is cheap and easy to obtain; and flocculation activity is good, and a sedimentation rate is favorably improved.

Description

technical field [0001] The invention relates to the technical field of polymer flocculant materials for sewage treatment, in particular to a starch-based polymer composite flocculant for sewage treatment and a preparation method thereof. Background technique [0002] At present, there are mainly two types of flocculants commonly used for sewage treatment at home and abroad: inorganic flocculants and organic flocculants. Inorganic flocculants are mainly iron salts, aluminum salts and high molecular polymers. The residues of iron ions and aluminum ions will cause certain harm to equipment pipelines or human bodies, and easily cause secondary pollution to water bodies. Therefore, in order to overcome the inherent defects of inorganic flocculants, the research and application of organic polymer flocculants are becoming more and more extensive. [0003] Natural polymer flocculants mainly use starch, cellulose, chitosan, vegetable gum, protein and microorganisms as raw materials,...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F226/02C02F1/56
CPCC02F1/56C08F251/00C08F226/02
Inventor 陈庆司文彬白涛李钧
Owner CHENDU NEW KELI CHEM SCI CO LTD
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