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Composite coagulant used for treatment of wastewater of printing and dyeing industry water washing technology

A wastewater treatment and coagulant technology, which is applied in textile industry wastewater treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of wastewater decolorization, long reuse period, secondary pollution, etc., and achieve easy industrial utilization , good water treatment effect and obvious coagulation effect

Inactive Publication Date: 2016-03-30
武汉宏安伟立科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the water solubility of the dye itself, the coagulation, sedimentation, adsorption and other methods in the traditional wastewater treatment cannot completely decolorize these wastewater.
At the same time, because the traditional method has the disadvantages of long wastewater treatment and reuse cycle, high cost, and secondary pollution, printing and dyeing wastewater cannot be well treated and reused.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 45g of PAC, get 0.6g of PAM, and mix with 500L of water to obtain the composite coagulant of the present invention; the PAC is polyaluminum chloride, and the PAM is anionic polyacrylamide with a molecular weight of about 8 million .

Embodiment 2

[0017] Take 65g of PAC, take 1g of PAM, and mix with 500L of water to obtain the composite coagulant of the present invention; the PAC is polyaluminum chloride, and the PAM is anionic polyacrylamide with a molecular weight of about 8 million.

Embodiment 3

[0019] Get 55g of PAC, get 0.8g of PAM, and mix with 500L of water to obtain the composite coagulant of the present invention; the PAC is polyaluminum chloride, and the PAM is an anionic polyacrylamide with a molecular weight of about 8 million .

[0020] Test effect:

[0021] Get composite coagulant of the present invention and the molecular weight that conventional printing and dyeing industry washing process waste water treatment process uses is that the PAM of 8,000,000 is compared under the same conditions as follows:

[0022] Table 1 Conventional treatment process using coagulant treatment effect

[0023] pH 8.0 when unprocessed 7.5 7.2 7.0 COD (mg / L) 146 113 102 98

[0024] Table 2 PAM in the composite coagulant of the present invention adopts the coagulation treatment effect with a molecular weight of 4,000,000

[0025]

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PUM

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Abstract

The present invention relates to the technical field of treatment of wastewater of printing and dyeing industry, and particularly relates to a composite coagulant used for treatment of wastewater of printing and dyeing industry water washing technology, the composite coagulant is characterized by being prepared from the following raw materials: PAC, PAM and water, wherein the weight ratio of PAC to PAM to water is 45-65: 0.6-1: 5 *10<5>, the PAC is poly aluminium chloride, the PAM is anionic polyacrylamide, and the molecular weight is about 8 million. The composite coagulant has the characteristics of obvious coagulation effect and low price.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment in the printing and dyeing industry, in particular to a composite coagulant used in the soaping process of the printing and dyeing industry. Background technique [0002] In the printing and dyeing process, whether it is pad dyeing or exhaust dyeing, washing after dyeing is an indispensable step in the dyeing process of the printing and dyeing factory. And the washing process is long, usually after 6 washings, the water consumption is very large, and the proportion of washing wastewater in printing and dyeing wastewater is the largest. The color of washing wastewater is generally low, the content of organic matter is low, and the CODcr value is relatively low, which belongs to low-concentration printing and dyeing wastewater. If this part of low-concentration wastewater can be treated and reused online, the water consumption in dyeing and finishing can be greatly reduced, which is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/30
Inventor 于涛
Owner 武汉宏安伟立科技有限公司
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