Method of processing organic contaminant waste-water difficult to biochemical degradation using tetravalent manganese compounds

A technology of organic pollutants and tetravalent manganese, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high consumption of chemicals, materials and energy, high treatment costs, Difficulty in wide application and other problems, to achieve the effect of cheap medicaments, low cost of wastewater treatment, and small investment

Inactive Publication Date: 2007-02-28
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The methods currently being studied to deal with refractory organic pollutants mainly include ozone oxidation, hydrogen peroxide oxidation, chlorine and its derivative oxidant oxidation, adsorption, photocatalytic oxidation, ultrasonic method, plasma method, etc. In the above-mentioned methods of biodegradable organic wastewater treatment, the consumption of medicaments, materials and energy is large, and the treatment cost is high
Therefore, there are great difficulties in the widespread application of these technologies in practical wastewater treatment.

Method used

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  • Method of processing organic contaminant waste-water difficult to biochemical degradation using tetravalent manganese compounds
  • Method of processing organic contaminant waste-water difficult to biochemical degradation using tetravalent manganese compounds
  • Method of processing organic contaminant waste-water difficult to biochemical degradation using tetravalent manganese compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: Acid Scarlet Dye

[0048] Acid scarlet dye is used as a representative of fuel and its intermediate compounds. Prepare the aqueous dye solution with industrial pure acid scarlet. Take five 250ml conical flasks, add 40mg / L acid scarlet solution to 250ml, and add 0.75g pyrolusite powder to adjust the pH value of the solution to 2.0, 3.0, 4.0, 5.0, 6.0. Then seal the Erlenmeyer flask and place it in an oscillator whose speed is adjusted to 200r / min. After the reaction is carried out for 1 hour, samples are taken and centrifuged respectively, and the absorbance is measured at a wavelength of 500nm by a spectrophotometer, and the measured absorbance values ​​are compared. Curve or into the linear equation to calculate the concentration of acid scarlet in the solution after a period of reaction, and calculate its decolorization rate. The results are shown in Table 1 and Figure 5

[0049] Dye solution pH

Embodiment 2

[0050] Embodiment 2 printing and dyeing wastewater

[0051] Assemble the experimental device according to Figure 4, fill the reaction column with manganese ore particles, the particle size is 1-3mm, the diameter of the reaction column is 10mm, the height is 100cm, and the height of the packed layer is 60cm. The wastewater treated in the experiment is the production wastewater discharged from the printing and dyeing factory, and the COD concentration of the wastewater is 622mg / L. The waste water passes through the reaction column filled with duromanganese ore in an upward flow, and the flow rate and flow rate of the treated waste water are adjusted through the peristaltic pump 1, and the acid dosage is adjusted through the peristaltic pump 2, so as to control the pH value of the solution in the reaction column. Use two 10-liter plastic containers as water storage tanks, and simultaneously serve as a neutralization regeneration tank. When the water storage in one plastic bucket ...

Embodiment 3

[0053] Example 3 Sulfide (S 2- )

[0054] Assemble the experimental device according to Figure 4, fill the reaction column with pyrolusite ore particles, the particle size is 1-3mm, the diameter of the reaction column is 10mm, the height is 100cm, and the height of the packed layer is 60cm. Experimental treatment The aqueous solution containing sulfur ions was prepared with analytically pure sodium sulfide, and the initial concentration was 102mg / L. The sulfur-containing aqueous solution passes through the reaction column filled with duromanganese ore by ascending flow, the flow rate and flow rate of the sulfur-containing aqueous solution are adjusted through the peristaltic pump 1, and the acid dosage is adjusted through the peristaltic pump 2, so that the pH value of the solution in the reaction column is controlled within the range of 2.0-6.0 , to compare the effect of solution pH on the oxidation removal rate of sulfur ions. Use two 10-liter plastic containers as water s...

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Abstract

The invention discloses disposing method of difficult biochemical decomposable organic polluted waste water, which is characterized by the following: oxidizing to decompose organic pollution in the quadravalent manganese compounds; reducing to generate bivalent manganese compounds; producing carbon dioxide and water; dehydrating bivalent manganese ion; sedimenting; oxidizing to generate quadravalent manganese compounds under weak caustic solution; recycling the waste water in the disposing course.

Description

Technical field: [0001] The invention relates to a wastewater treatment method, more specifically a treatment method for wastewater containing organic pollutants that are difficult to biochemically degrade. Background technique: [0002] The removal methods of organic pollutants in wastewater mainly include biochemical methods and chemical oxidation methods. The cheapest method for the treatment of wastewater containing organic pollutants (organic wastewater) is biochemical. The biochemical method oxidizes organic pollutants to carbon dioxide and water or reduces them to methane or synthesizes microbial cells through solid-liquid separation through the synthesis and catabolism of microorganisms, so as to achieve the purpose of purifying organic pollutants in wastewater. However, because some organic wastewater contains refractory and refractory organic pollutants or the pollutants are mainly refractory and refractory organic pollutants, the effect of biochemical treatment i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 陈天虎宋垠先谢晶晶彭书传朱承驻庆承松
Owner HEFEI UNIV OF TECH
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