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Microbial agent for extracting copper from high-salt sulfurized electroplating sludge and extraction method

A technology of microbial agent and electroplating sludge, which is applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve problems such as lack of salt tolerance, achieve good leaching effect, reduce wastewater treatment costs and the overall Process cost, effect of improving bioleaching function

Active Publication Date: 2021-06-04
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it also provides a new resource recovery idea for the resource disposal of refractory solid waste, but unfortunately, although traditional acidophilic ferrous or sulfur oxidizing microorganisms have good bioleaching effects on ores and some types of solid waste, etc. , but due to the lack of salt-tolerant biological characteristics, it is difficult to perform its bioleaching function in saline, especially high-salt environments
Therefore, there is currently no effective bioleaching method that can be applied to the bioleaching and resource recovery of high-salt sulfidation electroplating sludge.

Method used

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  • Microbial agent for extracting copper from high-salt sulfurized electroplating sludge and extraction method
  • Microbial agent for extracting copper from high-salt sulfurized electroplating sludge and extraction method
  • Microbial agent for extracting copper from high-salt sulfurized electroplating sludge and extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Using the high-salt sulfidation electroplating sludge produced by an electroplating factory as raw material, the biological flora constructed by the present invention is used to extract metallic copper. The steps are:

[0044] 1. The raw material of the high-salt sulfidation electroplating sludge was determined. Its moisture content was 55.34%, and its total copper content was 12.97%. It exists in the form of sulfide. As shown in Table 1.

[0045] Table 1

[0046]

[0047] 2. Weigh 450g of natural-based raw materials, add the microbial flora enrichment constructed in the present invention that meets the leaching requirements, so that the total leaching system reaches 2L, adjust the pH to about 2.0 with sulfuric acid, and use 350r / min at 50°C The stirring speed was stirred and leached for 4h.

[0048] The culture method of microbial flora enrichment is as follows: the ratio of Sulfobacillus acidophilus.TPY: Sulfolobus metallicus JCM 9184: Sulfobacillus thermotoler...

Embodiment 2

[0054] The high-salt sulfidation copper-containing electroplating sludge produced by an electroplating factory is used as raw material, and the biological flora constructed by the present invention is used to extract metallic copper.

[0055] 1. The metal content of the raw material was determined, and the main metal element was copper, and the copper content was 10.60%.

[0056] 2. Weigh 50g of wet-based raw material, add the biological flora liquid that meets the leaching requirements, so that the total leaching system reaches 200mL, adjust the pH to 2.0 with sulfuric acid, stir and leaching at 40°C at a stirring speed of 300r / min for 2h. The cultivation method of the microbial flora enrichment is the same as in Example 1.

[0057] 3. The leached material in step 2 is subjected to solid-liquid separation by means of suction filtration to obtain leaching liquid and leaching residue.

[0058] 4. Collect the filter residue obtained in step 3, add 120mL of water, stir and wash ...

Embodiment 3

[0061] The high-salt sulfidation copper-containing electroplating sludge produced by an electroplating factory is used as raw material, and the biological flora constructed by the present invention is used to extract metallic copper.

[0062] 1. Determination of the metal content of the raw material shows that the main metal element is copper, and the copper content is 11.60%.

[0063] 2. Weigh 25Kg of wet-based raw materials, add the biological flora liquid that meets the leaching requirements, make the total leaching system reach 100L, adjust the pH to 2.0, stir and leaching at 300r / min at 45°C for 4h.

[0064] 3. Use a filter press to separate the solid-liquid from the leached material in step 2 to obtain leachate and leach residue.

[0065] 4. Collect the filter residue obtained in step 3, add 70L of clean water, stir and wash at 50°C at a stirring speed of 300r / min for 1h, and separate the solid and liquid. This step is repeated once.

[0066] 5. Take an appropriate amou...

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Abstract

The invention relates to a microbial agent for extracting copper from high-salt sulfurized electroplating sludge and an extraction method. The microbial agent comprises Sulfobacillus acidophilus with the preservation number of CCTCC No:M2010203, Sulfolobusmetallicus with the preservation number of JCM 9184, Sulfobacillus thermotolerans with the preservation number of ATCC19377, and Leptospirillum ferriphilum with the preservation number of ATCC 29047. According to the microbial agent for extracting the copper from the high-salt sulfurized electroplating sludge and the extraction method, the problem that mineral leaching microorganisms from a fresh water environment are intolerant to sodium chloride is solved, and the growth speed and the leaching rate of acidophilic microorganisms from the fresh water environment in a salt-containing environment are increased.

Description

technical field [0001] The invention belongs to the field of biological leaching and recycling of solid waste, and in particular relates to a microbial bacterial agent and an extraction method for extracting copper from high-salt sulfidation electroplating sludge. Background technique [0002] Electroplating sludge refers to the heavy metal-containing sludge waste produced by the electroplating wastewater treatment industry after electroplating wastewater treatment. As the "final state" of electroplating wastewater treatment, although its quantity is much smaller than that of wastewater, because various heavy metals such as Cu, Ni, and Zn in wastewater are transferred to sludge, and its composition is very complex, Therefore, it is included in the seventeenth category of hazardous waste in the national hazardous waste list. Every year, more than 15 million tons of various types of electroplating sludge are added in my country. If this extremely harmful sludge is not dispose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C22B15/00C22B3/18C22B7/00C12R1/01
CPCC12N1/20C22B15/0065C22B3/18C22B7/006Y02P10/20
Inventor 周洪波王玉光孙见行周文博
Owner CENT SOUTH UNIV
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