Water treatment method for removing pollution through singlet oxygen dissolved air flotation

A technology of dissolved air flotation and singlet oxygen, which is applied in the field of water treatment, can solve problems such as difficult to remove organic pollutants, and achieve the effects of simple operation, convenient transportation and storage, and high pollution removal efficiency

Active Publication Date: 2015-07-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a water treatment method using singlet oxygen dissolved air flotation to

Method used

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  • Water treatment method for removing pollution through singlet oxygen dissolved air flotation
  • Water treatment method for removing pollution through singlet oxygen dissolved air flotation

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specific Embodiment approach 1

[0016] Specific implementation mode 1: This implementation mode is a water treatment method using singlet oxygen dissolved air flotation to remove pollution, which is realized through the following steps:

[0017] 1. Add the persulfate solution into the reflux water of the dissolved air flotation process, pump it into the pressure dissolved air tank through a pressurized water pump, and inject compressed air into the pressure dissolved air tank through an air compressor to form a Pressure-dissolved gas water; wherein, the concentration of the persulfate solution in the reflux water is 0.5-500mg / L;

[0018] 2. Release the pressurized dissolved air water in step 1 through the release device to generate 1 o 2 ) enters the water to be treated for oxidation and separation; after draining and slag discharge, the water treatment using singlet oxygen dissolved air flotation to remove pollution is completed; wherein, the water to be treated is source water , sewage or sewage plant se...

specific Embodiment approach 2

[0022] Specific embodiment two: 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. Other parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment differs from Embodiment 1 to Embodiment 2 in that the concentration of peroxymonosulfate in the reflux water is 1-450 mg / L. Other steps and parameters are the same as one of the specific implementation modes 1 to 2.

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Abstract

The invention discloses a water treatment method for removing pollution through singlet oxygen dissolved air flotation, relates to a multifunctional water treatment method with integrated separation and oxidation pollution removal, and solves the problem that organic pollutants in water are hard to remove by using a conventional air flotation process. According to the water treatment method, a peroxymonosulfate solution is added into backflow water of a dissolved air flotation process, the backflow water is fed into a pressure dissolved air tank to form pressurized dissolved air water with peroxymonosulfate, a great amount of micro bubbles with high-activity singlet oxygen due to cavatition formed through release of a releaser, solid granules and dissoluble organic pollutants in water and the micro bubbles float up due to the adhesion function, meanwhile the singlet oxygen in the micro bubbles can act on the adhered organic pollutants, and thus pollution can be removed through oxidation and separation together. The water treatment method disclosed by the invention is high in organic pollutant removal efficiency, free of toxic or harmful byproduct and low in operation cost, needs no extra equipment, and is suitable for large-scale application in the drinking water and sewage treatment process.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a water treatment method using singlet oxygen dissolved air floatation to remove pollution. Background technique [0002] As an efficient and rapid solid-liquid separation technology, air flotation has been widely used in the purification of low-temperature, low-turbidity, and high-algae water, as well as in the treatment of urban sewage and industrial wastewater. The air flotation method generates a large number of tiny air bubbles that adhere to solid impurities or dissolved pollutants in the water to form an air floating body with a density lower than that of water, so that it floats to the water surface under the action of buoyancy to form scum, so as to achieve solid-liquid separation. Purpose. The air flotation process can be divided into electrolytic air flotation, air distribution air flotation, and dissolved air flotation according to the different generation methods of bubbl...

Claims

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Application Information

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IPC IPC(8): C02F1/24C02F1/72
Inventor 江进李娟刘晴靓庞素艳晋艺欣
Owner HARBIN INST OF TECH
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