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A kind of urban sewage flocculant and preparation method thereof

A technology of urban sewage and flocculants, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as large investment, achieve good treatment effect, enhance bonding effect, and prepare The effect of simple method

Active Publication Date: 2020-05-15
江苏融汇环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of urban sewage is very large. If all of the sewage is treated secondary, the investment will be huge

Method used

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  • A kind of urban sewage flocculant and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An urban sewage flocculant comprises the following components in weight percentage: 28% chitosan, 10% magnesium aluminum hydrotalcite, 3% water-based polyurethane, 5% water and the balance of zeolite.

[0024] The particle size of the magnesium aluminum hydrotalcite is 50-100 μm.

[0025] The particle size of the zeolite is 10-30 μm.

[0026] A preparation method of urban sewage flocculant, comprising the following steps:

[0027] A, zeolite and aluminum magnesium hydrotalcite are pulverized respectively;

[0028] B, chitosan is mixed with the solution that concentration is 12%, adds zeolite powder, disperses evenly under the stirring speed of 450rpm, and stirring speed is adjusted to 125rpm, adds water-based polyurethane, and regulates viscosity to 700cps, and stirring speed is adjusted to 275rpm, slowly add magnesium aluminum hydrotalcite powder;

[0029] C, spray drying, get final product.

Embodiment 2

[0031] An urban sewage flocculant comprises the following components in weight percentage: 25% chitosan, 12% magnesium aluminum hydrotalcite, 2% water-based polyurethane, 6% water and the balance of zeolite.

[0032] The particle size of the magnesium aluminum hydrotalcite is 50-100 μm.

[0033] The particle size of the zeolite is 10-30 μm.

[0034] A preparation method of urban sewage flocculant, comprising the following steps:

[0035] A, zeolite and aluminum magnesium hydrotalcite are pulverized respectively;

[0036] B, chitosan is mixed with the solution that concentration is 10%, adds zeolite powder, disperses evenly under the stirring speed of 500rpm, and stirring speed is adjusted to 120rpm, adds water-based polyurethane, and regulates viscosity to 800cps, and stirring speed is adjusted to 250rpm, slowly add magnesium aluminum hydrotalcite powder;

[0037] C, spray drying, get final product.

Embodiment 3

[0039] An urban sewage flocculant comprises the following ingredients in weight percent: 30% chitosan, 8% magnesium aluminum hydrotalcite, 5% water-based polyurethane, 4% water and the balance of zeolite.

[0040] The particle size of the magnesium aluminum hydrotalcite is 50-100 μm.

[0041] The particle size of the zeolite is 10-30 μm.

[0042] A preparation method of urban sewage flocculant, comprising the following steps:

[0043] A, zeolite and aluminum magnesium hydrotalcite are pulverized respectively;

[0044] B, chitosan is mixed with the solution that concentration is 15%, adds zeolite powder, disperses evenly under the stirring speed of 400rpm, and stirring speed is adjusted to 150rpm, adds water-based polyurethane, and adjusts viscosity to 500cps, and stirring speed is adjusted to 300rpm, slowly add magnesium aluminum hydrotalcite powder;

[0045] C, spray drying, get final product.

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Abstract

The invention provides an urban sewage flocculant which mainly uses chitosan and zeolite to adsorb various metal ions in the urban sewage, wherein a polyurethane component not only can enhance the bonding effect between the raw materials and prevent the raw materials from being dispersed into the water during treatment, but also has a very good adsorption effect on oxygen-consumed organic matters; magnesium aluminum hydrotalcite is added; hydroxides formed by magnesium and aluminum are low-solubility substances, the hydrotalcite structure has a large surface area, and adsorbates can be attached to the surface of hydrotalcite, so that the coagulation effect of the flocculant can be improved; the flocculant provided by the invention is simple in preparation method, low in cost of raw materials, and good in urban sewage treatment effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an urban sewage flocculant and a preparation method thereof. Background technique [0002] Water resource pollution has become a serious social problem. Heavy metal ions, pesticides, insecticides and environmental hormones in sewage pose a huge threat to human health. Years of practice and research have shown that adding flocculants to coagulate pollutants in wastewater during wastewater treatment is one of the effective methods. It has the characteristics of simple process and low cost. Very concerned. [0003] More than 90% of urban sewage is water, and the rest is solid matter. Water generally contains the following pollutants: [0004] Suspended solids: generally 200-500 mg / L, sometimes more than 1000 mg / L. Among them, inorganic and colloidal particles are easy to adsorb organic poisons, heavy metals, pesticides, pathogenic bacteria, etc., forming complex polluta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56
CPCC02F1/5236C02F1/5245C02F1/56
Inventor 应剑军
Owner 江苏融汇环境工程有限公司
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