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Recycling method of acid dye waste water high in concentration and sulfate content

An acid dye, sulfate technology, applied in the fields of electrochemistry and pollutant control, can solve the problems of poor treatment effect of hydrophilic dyes, high operating cost, difficult dehydration, etc., achieves high degree of automation, low operating cost, avoids two The effect of secondary pollution

Active Publication Date: 2019-04-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main advantages of the chemical coagulation method are simple process flow, convenient operation and management, low equipment investment, small footprint, and high decolorization efficiency for hydrophobic dyes; the disadvantages are high operating costs, large amount of sludge, and difficult dehydration. Poor treatment with hydrophilic dyes

Method used

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  • Recycling method of acid dye waste water high in concentration and sulfate content
  • Recycling method of acid dye waste water high in concentration and sulfate content
  • Recycling method of acid dye waste water high in concentration and sulfate content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take 500ml of high-concentration and high-sulfate-containing acid dye wastewater, add ammonia water to the wastewater to adjust the pH, so that the pH of the wastewater reaches 7, and then remove the sediment therein by vacuum filtration. The surface of the graphite rod is polished and decontaminated with sandpaper for use, and the graphite rod is used as the anode, the titanium sheet electrode is used as the cathode, and the filtered waste water is used as the electrolyte to assemble an electrolytic cell system. Apply a working voltage of 6V between the anode and the cathode, continue the electrochemical oxidation and electrochemical stripping adsorption for 120min and turn off the power supply. After taking out the anode and cathode, let it stand for 45 minutes, then filter the electrolyte, and measure the water quality after filtration. Then the solution was distilled at a temperature of 70° C. and a pressure of 0.01 MPa for 30 min.

Embodiment 2

[0044] Take 500ml of high-concentration and high-sulfate-containing acid dye wastewater, add ammonia water to the wastewater to adjust the pH, so that the pH of the wastewater reaches 7, and then remove the sediment therein by vacuum filtration. The surface of the graphite rod is polished and decontaminated with sandpaper for use, and the graphite rod is used as the anode, the titanium sheet electrode is used as the cathode, and the filtered waste water is used as the electrolyte to assemble an electrolytic cell system. Apply a working voltage of 7V between the anode and the cathode, continue the electrochemical oxidation and electrochemical stripping adsorption for 100min and turn off the power supply. After taking out the anode and cathode, let it stand for 60 minutes, then filter the electrolyte, and measure the water quality after filtration. Then the solution was distilled at a temperature of 90° C. and a pressure of 0.03 MPa for 15 minutes.

Embodiment 3

[0046] Take 500ml of high-concentration and high-sulfate-containing acid dye wastewater, add ammonia water to the wastewater to adjust the pH, so that the pH of the wastewater reaches 7, and then remove the sediment therein by vacuum filtration. The surface of the graphite rod is polished and decontaminated with sandpaper for use, and the graphite rod is used as the anode, the titanium sheet electrode is used as the cathode, and the filtered waste water is used as the electrolyte to assemble an electrolytic cell system. Apply a working voltage of 8V between the anode and the cathode, continue the electrochemical oxidation and electrochemical stripping adsorption for 90min and turn off the power supply. After taking out the anode and cathode, let it stand for 50 minutes, then filter the electrolyte, and measure the water quality after filtration. Then the solution was distilled at a temperature of 80° C. and a pressure of 0.02 MPa for 20 min.

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Abstract

The invention relates to a recycling method of acid dye waste water high in concentration and sulfate content. The recycling method includes: adding ammonium hydroxide into the acid dye waste water high in concentration so as to adjust the pH (potential of hydrogen) to netrual; adopting a graphite material as an anode, a titanium sheet electrode as a cathode and waste water, subjected to suction filtration, as electrolyte to assemble an electrolytic tank system, and applying constant voltage between the cathode and the anode to perform electrochemical oxidation and electrochemical stripping and adsorption; taking out the anode and the cathode, standing the electrolyte, and filtering the electrolyte; detecting a filtered aqueous solution, distilling at reduced pressure, and recycling ammonium sulfate; collecting filtered residues, and furtherly performing graphene composite material study.

Description

technical field [0001] The invention relates to the technical field of electrochemistry and pollutant control, in particular to a resource recovery method for high-concentration and high-sulfate-containing acid dye wastewater. Background technique [0002] Over the years, the quality of my country's water resources has continued to decline, the water environment has continued to deteriorate, and water shortages and accidents caused by pollution have continued to occur, which not only shut down factories, reduced agricultural production or even failed harvests, but also caused adverse social impacts and large economic losses. , seriously threatening the sustainable development of society and the survival of human beings. [0003] Sewage discharged from industrial production is one of the main sources of pollutants in the water environment, and printing and dyeing sewage is one of the important sources of water environmental pollution, and it is also known as one of the three m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01C1/242C02F101/30C02F101/38C02F101/10C02F101/12
CPCC01C1/242C02F9/00C02F1/046C02F1/001C02F2101/101C02F2101/12C02F2101/308C02F2101/38C02F1/461C02F1/4672C02F1/66Y02W10/37
Inventor 杨彬雷乐成谭思宇李中坚侯阳石朴
Owner ZHEJIANG UNIV