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Environment-friendly air floatation synergist for treating printing and dyeing wastewater

A technology of printing and dyeing wastewater and synergist, which is applied in flotation water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. Uniformity and other issues, to achieve good effect, reduce the amount of addition, and change the effect of surface activity

Pending Publication Date: 2017-01-04
ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 4. The uniformity of the bubbles, including the diameter difference between the largest bubble and the smallest bubble and the proportion of small diameter bubbles to the total number of bubbles. The increase of large bubbles will reduce the air flotation efficiency
However, adding a single type of surfactant is not easy to control the size, density and uniformity of the bubbles, and if the added surfactant is not suitable, it will even reduce the air flotation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The wastewater treatment station of a printing and dyeing factory adopts air flotation as pretreatment, and the flocculation agent uses PAC and PAM, and adds 40 parts of A agent and 60 parts of B agent mixture:

[0021] The components of Agent A are: 20 parts of sodium dodecyl sulfonate, 50 parts of sodium α-alkenyl sulfonate and 30 parts of betaine;

[0022] B agent components are: 30 parts KCl and 70 parts Na 2 SO 4 .

[0023] Compared with no air flotation synergist, the solid-liquid separation effect is significantly increased, the COD removal rate increased from 25% to 50%, the suspended solids (SS) removal rate increased from 60% to 75%, and the chromaticity removal rate increased by 5%.

Embodiment 2

[0025] In Example 1, the wastewater treatment station of the printing and dyeing factory adopts air flotation as pretreatment, and the flocculation agent adopts PAC and PAM, and adds 30 parts of A agent and 70 parts of B agent mixture:

[0026] The components of agent A are: 35 parts of sodium dodecyl sulfonate, 45 parts of sodium α-alkenyl sulfonate and 20 parts of betaine;

[0027] Agent B components are: 30 parts of NaCl and 70 parts of Na 2 SO 4 .

[0028] Compared with no air flotation synergist, the solid-liquid separation effect increased significantly, the COD removal rate increased from 25% to 55%, the suspended solids (SS) removal rate increased from 60% to 80%, and the chromaticity removal rate An 8% increase.

Embodiment 3

[0030] In Example 1, the wastewater treatment station of the printing and dyeing factory adopts air flotation as pretreatment, and the flocculation agent adopts PAC and PAM, and adds 25 parts of A agent and 75 parts of B agent mixture:

[0031] The components of agent A are: 30 parts of sodium dodecyl sulfonate, 50 parts of sodium α-alkenyl sulfonate and 20 parts of betaine;

[0032] B agent components are: B agent components are: 30 parts of NaCl, 70 parts of Na 2 SO 4 with K 2 SO 4 a mixture of which Na 2 SO 4 with K 2 SO 4 The ratio is 1:1.

[0033] Compared with no air flotation synergist, the solid-liquid separation effect is significantly increased, the COD removal rate increased from 25% to 58%, the suspended solids (SS) removal rate increased from 60% to 83%, and the chromaticity removal rate increased by 10%.

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PUM

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Abstract

The invention discloses an environment-friendly air floatation synergist for treating printing and dyeing wastewater. The environment-friendly air floatation synergist is prepared from, by weight, 10-50 parts of an agent A and 50-90 parts of an agent B, wherein the agent A is prepared from, by weight, 10-40 parts of sodium dodecyl sulfate, 40-70 parts of alpha-olefin sulfonate and 20-50 parts of glycine betaine, and the agent B is prepared from, by weight, 10-40 parts of inorganic chlorine salt and 60-80 parts of inorganic sulfate, wherein inorganic chlorine salt is one or a combination of KCl and NaCl, and inorganic sulfate is one or a combination of K2SO4 and Na2SO4.

Description

technical field [0001] The invention relates to an environment-friendly air flotation synergist used for the treatment of printing and dyeing wastewater, which belongs to the field of wastewater treatment in environmental protection, especially the field of wastewater treatment in the printing and dyeing industry. Background technique [0002] Air flotation is one of the commonly used water treatment technologies at present. As a fast, efficient, and low-energy solid-liquid separation technology, it is not only suitable for water supply and purification, but also for the treatment of various wastewater, especially for the separation of some It is superior to the general gravity sedimentation method in eliminating impurities in water. The principle of air flotation is to generate a large number of fine air bubbles in water. Under the joint action of various forces such as interfacial tension, bubble buoyancy and hydrostatic pressure difference, the fine air bubbles are urged ...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/24
CPCC02F1/24C02F1/56
Inventor 任松洁林伟青徐贝李伟
Owner ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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