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A method of using singlet oxygen to treat landfill leachate

A landfill leachate and singlet oxygen technology, applied in the direction of oxidized water/sewage treatment, special treatment targets, water/sewage treatment, etc., can solve the problems of low biodegradability, low treatment efficiency, and difficulty in meeting national discharge standards, etc. problems, to achieve the effect of high reactivity, simple and easy operation, and high oxidative degradation efficiency

Active Publication Date: 2017-11-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of low biodegradability, low treatment efficiency, and difficulty in meeting national discharge standards in biological treatment methods

Method used

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  • A method of using singlet oxygen to treat landfill leachate
  • A method of using singlet oxygen to treat landfill leachate

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Experimental program
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Effect test

specific Embodiment approach 1

[0018] Embodiment 1: A method of using singlet oxygen to treat landfill leachate in this embodiment is realized through the following steps: adding the catalyst and the oxidant to the to-be-treated In the landfill leachate, control the concentration of peroxide in the landfill leachate to 500-10000 mg / L, and the reaction time is 60-240 minutes. The water is kept in a stirring state during the treatment process, and the treated water is subjected to biological treatment, which is completed The landfill leachate is treated with singlet oxygen; wherein, the catalyst is pyruvic acid; and the oxidant is peroxide.

[0019] The principle of a method for treating landfill leachate utilizing singlet oxygen in this embodiment is as follows: first, pyruvic acid catalyzes peroxide (peroxymonosulfate, percarbonate) to produce a diepoxy intermediate; then, bicyclic The oxygen intermediate further reacts with peroxide to produce singlet oxygen ( 1 o 2 ) and pyruvic acid, while the diepoxy ...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the peroxide is a mixture of one or more of persulfate and percarbonate in any ratio. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the persulfate is sodium persulfate (NaHSO 5 ), potassium persulfate (KHSO 5 ), ammonium persulfate (NH 4 HSO 5 ), calcium persulfate (Ca(HSO 5 ) 2 ), magnesium persulfate (Mg(HSO 5 ) 2 ) in one or several mixtures in any ratio. Others are the same as in the first embodiment.

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Abstract

The invention relates to a landfill leachate treatment method and especially relates to a method for singlet state oxygen treatment on landfill leachate. The method comprises adding pyruvic acid as a catalyst and peroxides (such as peroxymonosulfate and percarbonate) as oxidizing agents into landfill leachate, carrying out stirring for a reaction, and carrying out biological treatment. The peroxides undergo a reaction in the presence of pyruvic acid as a catalyst to produce a dual-epoxy intermediate, the dual-epoxy intermediate and the peroxides further undergo a reaction to produce singlet state oxygen and pyruvic acid, the pyruvic acid sequentially catalyzes the peroxide reaction and produces cyclic catalysis effects in the reaction, and the produced high-activity singlet state oxygen fast acts difficultly degraded organic pollutants in landfill leachate and transforms the organic pollutants into biodegradable micromolecule compounds so that biodegradability is improved. The method has high treatment efficiency, does not produce poisonous and harmful side products, utilizes green, safe and no toxic or side effect pyruvic acid as a catalyst and peroxides as oxidizing agents, and is less influenced by water conditions.

Description

technical field [0001] The invention relates to a method for treating landfill leachate, in particular to a method for treating landfill leachate with singlet oxygen. Background technique [0002] Landfill leachate is a high-concentration organic wastewater with complex components, high toxicity, deep color, foul smell, and large changes in water quality and quantity. It contains many heavy metals, "three-caused" substances, and endocrine disrupting substances. It will seriously pollute groundwater and soil, even destroy the ecosystem and endanger human health. [0003] Biological treatment is widely used in the treatment of landfill leachate because of its low operating cost and good treatment effect. However, with the increase of landfill time, the concentration of ammonia nitrogen in landfill leachate is getting higher and higher, and humic acid and other difficult The biodegradable macromolecular substances are increasing, and the biodegradability of wastewater is getti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F103/06
CPCC02F1/722C02F1/725C02F2103/06C02F2303/00C02F2305/023
Inventor 庞素艳江进袁立鹏杨悦
Owner HARBIN UNIV OF SCI & TECH
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