A recovery system and recovery method for waste resin powder

A recovery system and recovery method technology, applied in the field of waste resin powder recovery system, can solve the problems of no analysis of material components, no mention of leaching rate, and easy sedimentation of particles, so as to shorten the cultivation cycle, reduce production costs, and eliminate waste. highly harmful effects

Active Publication Date: 2019-07-12
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent document CN201880729U discloses a recycling device for waste printed circuit boards. The device adopts a drum design, which solves the problem of superposition and easy sedimentation between particles. The bioleaching time of Acidithiobacillus ferroxidans and Acidithiobacillus thiooxidans is 3-10 days, and the copper in the leaching solution is The content is up to 3.5g / L, but this document has no specific material component analysis, no mention of leaching rate, and the leaching cycle is too long
However, the process is still batch bioleaching, and the strain is single, and the leaching cycle is long

Method used

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  • A recovery system and recovery method for waste resin powder
  • A recovery system and recovery method for waste resin powder
  • A recovery system and recovery method for waste resin powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A. Microbial culture stage:

[0051] Configure basal medium, its composition content: ammonium sulfate 3g / L, magnesium sulfate heptahydrate 0.5g / L, potassium hydrogen phosphate 0.8g / L, potassium chloride 0.12g / L, calcium nitrate 0.05g / L, sulfuric acid heptahydrate Ferrous iron 50g / L, sulfur powder 10g / L, adjust the pH to 2 with sulfuric acid, add the basal medium into the culture tank, and inoculate Thiobacillus ferrooxidans CS 78 (Acidithiobacillus ferrooxidans) into the culture tank according to the inoculum size 10% Incubate at a temperature of 30°C until the cell concentration in the solution reaches 10 8 cells / mL, add grid packing, hang film culture, and gradually start continuous mixing culture to obtain a bacterial concentration of 1.31×10 8 Each / mL microbial culture solution, the oxidation-reduction potential of the culture solution is 709mV, and the specific parameters are shown in Table 1.

[0052] B. Leaching stage:

[0053] Import the microbial culture so...

Embodiment 2

[0074] A. Microbial culture stage:

[0075] Configure the basic medium, its composition content: ammonium sulfate 1.5g / L, magnesium sulfate heptahydrate 0.25g / L, potassium hydrogen phosphate 0.5g / L, potassium chloride 0.1g / L, calcium nitrate 0.01g / L, heptahydrate Ferrous sulfate 30g / L, adjust pH to 1.5 with sulfuric acid, add basal medium in the culture tank, and by inoculum size 10%, add Thiobacillus ferrooxidans CS 78 (Acidithiobacillus ferrooxidans), acidophilus ferrooxidans Leptospira The mixed strains of CS13 (Leptospirillum ferriphilum) and acidophilic sulfur bacillus CS17 (Sulfobacillus thermosulfidooxidans) were inoculated into the culture tank and cultivated at a temperature of 45°C until the cell concentration in the solution reached 108 cells / mL, add grid film-hanging filler, hang film culture, gradually start continuous mixing culture, and obtain a bacterial concentration of 1×10 9 Individual / mL microbial culture fluid, the oxidation-reduction potential of the cult...

Embodiment 3

[0092] A. Microbial culture stage:

[0093] Configure basal medium, its composition content: ammonium sulfate 2g / L, magnesium sulfate heptahydrate 0.3g / L, potassium hydrogen phosphate 0.6g / L, potassium chloride 0.1g / L, calcium nitrate 0.03g / L, sulfuric acid heptahydrate Ferrous iron 40g / L, sulfur powder 0.2g / L, adjust pH to 2.0 with sulfuric acid, base culture medium is added in the culture tank, and acidophilic sulfur bacillus ferrivorans CS12 (Acidithiobacillus ferrivorans) and acidophilic iron Thiobacillus ferrooxidans CS 78 (Acidithiobacillus ferrooxidans) was inoculated into the culture tank and cultured at a temperature of 30°C until the cell concentration in the solution reached 10 8 each / mL, add the screen-packed waste resin module film-hanging filler, film-hanging culture, and gradually start continuous cultivation, and obtain a bacterial concentration of 1.5×10 8 Individual / mL microbial culture fluid, the oxidation-reduction potential of the culture fluid is 706mV. ...

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Abstract

The invention discloses a recovery system for a waste resin powder. The recovery system comprises a microbial culture device, a leaching device, a settlement device, a copper recovery device, a brining device, a lead settling device, a washing device, a drying device and a solid liquid separating machine. The invention further discloses a recovery method for the waste resin powder. The recovery method comprises the microbial culture stage, the leaching stage, the settling stage, the copper recovery stage, the brining stage, the lead settling stage, the washing stage, and the drying stage. Thebiological copper leaching cycle of the waste resin powder is shortened, the production efficiency is improved, the sodium chloride is used in brining, the lead in the waste resin powder is effectively removed, the lead is separately recovered, the harmless degree of the leaching residue is high, and in addition, the recycling utilization of the resource is realized, the resource is saved, the useratio of the resource is also improved, and the production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of solid waste by biological methods, and in particular relates to a recycling system and method for waste resin powder. Background technique [0002] With the further development of electronic technology, the replacement cycle of electronic products is continuously shortened, and the number of waste electronic products is increasing day by day, which has caused serious harm to the environment, especially printed circuit boards, copper-clad laminate scraps, etc. Copper-clad laminate is a raw material for the electronics industry. Its structure includes substrate, copper foil, copper-clad laminate adhesive, etc. It is made of wood pulp paper or glass fiber cloth as a reinforcing material, impregnated with resin, and covered with copper foil on one or both sides. , formed by hot pressing. In addition to being made into circuit boards, copper clad laminates can also be used in elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/38C12M1/36C12M1/04C12M1/00C12N1/36C12N1/20C22B7/00C22B15/00
CPCC12M23/20C12M29/06C12M41/12C12M41/26C12M43/00C12N1/20C12N1/36C22B7/006C22B15/0084Y02P10/20
Inventor 周洪波周文博刘晓文刘荣辉王炜陈岩贽温勇程海娜彭晶陈静薛璟婷田壮葛杨
Owner CENT SOUTH UNIV
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