Nano powder-organic polymer composite flocculating agent

An organic polymer, composite flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of large dosage, increased treatment cost, and large amount of sludge generated, so as to reduce the turbidity of effluent and easy to operate. , the effect of reducing the volume of sludge

Inactive Publication Date: 2013-08-28
SUZHOU XUDA ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, general adsorbents and other additives are generally only used as the backbone of flocs in practical applications, and the dosage is large and the amount of sludge generated is large, thus increasing the treatment cost

Method used

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  • Nano powder-organic polymer composite flocculating agent
  • Nano powder-organic polymer composite flocculating agent
  • Nano powder-organic polymer composite flocculating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation: When equipped with PolyDADMAC (polydimethyldiallylamine chloride) stock solution, add 0 mg / L, 1000 mg / L, 5000 mg / L, 10000 mg / L, 20000 mg / L of silica ( SiO2) nano-powders are stirred and polymerized under suitable conditions.

[0021] Application: The oily sewage water sample contains 2000mg / L oil. Take oily sewage and add it to a series of 125mL beakers. Each bottle contains 100mL sewage. The PolyDADMAC flocculant, the flocculant dosage is 5 mg / L, 10 mg / L, 20 mg / L, 30 mg / L, 40 mg / L, 50 mg / L. After the flocculant is added, the fast mixing lasts for 30 seconds; then the slow mixing lasts for 10 minutes. After 15 minutes of static precipitation, the clear liquid was taken for detection, and the oil content and turbidity changes of the water samples before and after treatment were measured. The results show that the removal rate of oil and turbidity reaches 99% and 95% at the optimum dosage.

[0022]

[0023]

[0024]

Embodiment 2

[0026] Preparation: When equipped with PolyDADMAC (polydimethyldiallylamine chloride) stock solution, add alumina (Al2O3 ) Nanopowders are stirred and polymerized under suitable conditions.

[0027] Application: Take high-color sewage water samples and add them to a series of 125mL beakers. PolyDADMAC flocculant of alumina nano powder, the dosage of flocculant is 10 mg / L, 50 mg / L, 100 mg / L, 150 mg / L, 200 mg / L, 300 mg / L, 400 mg / L , 500 mg / L. After the flocculant is added, the fast mixing lasts for 30 seconds; then the slow mixing lasts for 10 minutes. After 15 minutes of static precipitation, the clear liquid was taken for detection, and the color and turbidity changes of the water samples before and after treatment were measured. The results show that: at the optimal dosage, the chroma removal rate reaches 75%, and the turbidity removal rate reaches 80%.

[0028]

[0029]

[0030]

Embodiment 3

[0032] Preparation: When equipped with PolyDADMAC (polydimethyldiallylamine chloride) stock solution, add iron oxide (Fe2O3 ) Nanopowders are stirred and polymerized under suitable conditions.

[0033] Application: Take oilfield associated water samples and add them to a series of 125mL beakers. PolyDADMAC flocculant of iron oxide nanopowder, flocculant dosage is 10 mg / L, 20 mg / L, 30 mg / L, 40 mg / L, 50 mg / L, 100 mg / L, 150 mg / L , 200 mg / L. After the flocculant is added, the fast mixing lasts for 30 seconds; then the slow mixing lasts for 10 minutes. After 15 minutes of static precipitation, the clear liquid was taken for detection, and the oil content, viscosity and turbidity changes of the water samples before and after treatment were measured. The results show that the oil removal rate reaches 98%, the viscosity decreases by 95%, and the turbidity removal rate reaches 95% at the optimum dosage.

[0034]

[0035]

[0036]

[0037]

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Abstract

The present invention discloses a nano powder-organic polymer composite flocculating agent, which is prepared by a nano powder and a cationic water-soluble organic polymer by weight, including 0.01 -2.5% of the nano powder, and 0.5-40% of the organic polymer, the balance being water. The invention is applicable to enhancement of industrial wastewater treatment, oilfield associated water treatment, urban sewage deepened treatment, and sludge dewatering treatment, and has a high treatment effect on oil, toxic organics, humus, color and other pollutants. The nano powder-organic polymer composite flocculating agent can strengthen solid-water separation, enhance sedimentation speed, reduce sludge volume, and reduce water outlet turbidity.

Description

technical field [0001] The invention relates to an inorganic-organic composite flocculant, in particular to a composite flocculant with good removal effect on pollutants such as grease, poisonous organic matter, turbidity and the like in enhanced sewage treatment. Background technique [0002] With the rapid development of domestic industry, the amount of sewage discharge continues to increase, and the demand for sewage treatment is also increasing. The coagulation-sedimentation method uses coagulant technology to treat suspended solids in wastewater, and is widely used in water / sewage treatment. However, the traditional flocculants are not ideal for the treatment of general water-soluble organic matter, oil and the like. Experimental research results at home and abroad indicate that the traditional flocculation-sedimentation method can only remove 20%-30% of organic pollutants in water, and the amount of sludge is large, which increases the burden of solid waste treatment....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
Inventor 唐永春陈傲洋
Owner SUZHOU XUDA ENVIRONMENTAL PROTECTION SCI & TECH
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