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Recycling method of iron-containing resin desorption waste liquid

A recycling and waste liquid technology, applied in chemical instruments and methods, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as high cost of treatment, waste of resources, complicated process, etc., and achieve waste water treatment cost effect

Inactive Publication Date: 2014-01-15
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the existing problems in the existing iron-containing resin desorption waste liquid treatment technology, such as complex process, high treatment cost, waste of resources, etc., the present invention provides a resource utilization method for iron-containing resin desorption waste liquid. Systematic analysis of the iron-containing resin desorption waste liquid to understand its composition, abandon the previous idea of ​​neutralization and chemical precipitation treatment, and innovatively use the waste liquid as a flocculant agent for wastewater treatment to remove phosphorus and heavy metals in electroplating wastewater , realizing the resource utilization of the waste liquid, "using waste to treat waste, turning waste into treasure", embodies the concept of circular economy, and meets the national requirements on "comprehensive utilization of resources", and the waste liquid has no effect on phosphorus, The removal efficiency of heavy metals can reach more than 99%, and the flocculation and sedimentation effect is basically the same as that of commercial ferric chloride flocculants. At the same time, it saves the cost of wastewater treatment for the electroplating industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for resource utilization of iron-containing resin desorption waste liquid, using the waste liquid to remove phosphorus and Cu in electroplating wastewater 2+ and Ni 2+ , the specific steps are as follows:

[0037] A. Using atomic absorption method, measure the concentration of ferric chloride in the desorption waste liquid of iron-containing resin, and control the concentration range between 30 ~ 60g / L; detect multiple groups of desorption waste liquid of iron-containing resin to be tested The concentration of ferric chloride in the medium; mix the ferric chloride concentration lower than 30g / L with the iron-containing resin desorption waste liquid higher than 60g / L according to the volume ratio and stir evenly, and then use the atomic absorption method to detect the mixed The concentration of ferric chloride in the desorption waste liquid of iron-containing resin until the concentration range is between 30~60g / L; The concentration of ferric chloride in the de...

Embodiment 2

[0042] With embodiment 1, the difference is: in the described step A, the concentration of ferric chloride in the iron-containing resin desorption waste liquid is 40g / L; In the described step B, detect electroplating industry production wastewater phosphorus The content is 100 mg / L; in the step C, after the iron-containing resin desorption waste liquid is mixed with the electroplating wastewater to be treated, the ratio of the molar concentration of ferric chloride to the molar concentration of ferric chloride is 1: 2.2, and the mixture is stirred and reacted for 20 minutes . Finally, the content of phosphorus in the filtrate was determined to be 0.45 mg / L by the extraction-phosphomolybdenum blue colorimetric method, which reached the discharge standard.

Embodiment 3

[0044] A method for resource utilization of iron-containing resin desorption waste liquid, using the waste liquid to remove phosphorus and Cu in electroplating wastewater 2+ and Ni 2+ , the specific steps are as follows:

[0045] A, utilize atomic absorption method, detect the concentration of ferric trichloride in 3 groups of to-be-measured iron-containing resin desorption waste liquids; Find that the concentration of ferric chloride in this many groups of waste waters is respectively 10g / L, 15g / L and 80g / L, after these 3 groups of iron-containing resin desorption waste liquids were mixed and stirred uniformly, the concentration of ferric chloride in the mixed iron-containing resin desorption waste liquids was detected by atomic absorption method again to be 30g / L.

[0046] B. Using the extraction-phosphorus molybdenum blue colorimetric method to detect the phosphorus content in the electroplating wastewater to be treated is 65mg / L, and using the atomic absorption method to...

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Abstract

The invention discloses a recycling method of iron-containing resin desorption waste liquid, and belongs to the technical field of the recycling treatment of the waste liquid. The recycling method is characterized in that the iron-containing resin desorption waste liquid produced in the recycling process of waste hydrochloric acid in an electroplating industry is used as a flocculant substitute product so as to remove phosphorus and heavy metals in the electroplating waste water through a flocculating and precipitation way, the concentration of the phosphorus in the discharged water is lower than 0.5mg / L, the content of heavy metal Cu<2+> (copper ions) is lower than 0.2mg / L, the content of the Ni<2+> (nickel ions) is lower than 0.5mg / L, and the removal efficiency can reach more than 99 percent. For the problems in the existing iron-containing resin desorption waste liquid treatment technology such as complicated flow, high treatment cost and resource waste, the invention provides the recycling method of the iron-containing resin desorption waste liquid. The standard emission of the phosphorus and heavy metals in the waste water can be realized while recycling the iron-containing resin desorption waste liquid. The method can be widely used for recycling the iron-containing resin desroption waste liquid in the electroplating industry and the deep treatment of the phosphorus-containing and heavy-metal-containing waste water.

Description

technical field [0001] The invention belongs to the technical field of waste liquid resource utilization, and more specifically relates to a method for resource utilization of iron-containing resin desorption waste liquid whose main component is resin desorption liquid. Background technique [0002] The content of phosphorus in electroplating wastewater is high, and it contains biotoxic substances such as heavy metals. It is difficult for general secondary biological treatment to meet the advanced treatment requirements stipulated in the electroplating pollutant discharge standard (GB21900-2008). [0003] The usual phosphorus removal methods require the purchase of special ferric chloride reagents, which increases the processing cost for enterprises. Electroplating, iron and steel and other industries use a large amount of iron castings as raw materials. In order to remove the surface rust, they often need concentrated hydrochloric acid for washing, so a large amount of iron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F1/58C02F1/62
Inventor 吴俊锋凌虹赵昕杨磊雷艳张炜铭吕路潘丙才俞冬辉
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI