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Process for degradation of organic waste water by fly ash

A technology of organic wastewater and fly ash, which is applied in energy wastewater treatment, adsorption water/sewage treatment, etc., can solve the problem of high cost of wastewater treatment technology, achieve the effects of thorough degradation of organic matter, improvement of treatment efficiency, and high heat utilization rate

Inactive Publication Date: 2006-09-27
CHONGQING UNIV
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Problems solved by technology

These use fly ash to only adsorb organic pollutants, without deep oxidation treatment of organic matter, and the technical cost of wastewater treatment is relatively high

Method used

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  • Process for degradation of organic waste water by fly ash
  • Process for degradation of organic waste water by fly ash

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Embodiment Construction

[0019] A method for degrading organic waste water with fly ash, the method uses fly ash as an adsorbent for organic matter in the waste water. The method includes the following steps:

[0020] a. Fully mix fly ash and waste water, the mass ratio of fly ash and waste water is 0.8%~1.5%;

[0021] b. Adjust the acidity of the waste water mixture, and its pH value is 1-4;

[0022] c, adding hydrogen peroxide in the waste water mixed liquid, its addition is 0.25%~0.4% of the quality of the waste water mixed liquid, so that it forms Fenton-like reagent with the soluble metal ion in the fly ash;

[0023] d. Let the waste water mixture pass through the glass or ceramic pipe with microwave field, and the time for each particle to pass through the pipe is 3-5 minutes; the microwave frequency is 2000-2800MHz, and the power is 600-1000W;

[0024] e. Finally, filter, precipitate, detect, collect fly ash containing pollutants, and discharge or recycle the treated water.

[0025] Disclose...

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Abstract

A method is about using coal ash to degrade organic wastewater. The steps are: a. fully mixing coal ash and waste-water, the quality ratio is 0.8%-1.5%; b.adjusting the pH value of waste-water mixture as 1-4; c. adding hydrogen dioxide in the waste-water mixture to form allied Fenton reagent with soluble metallic ion in coal ash; d. letting waste-water getting acrossing the glass or earthenware duct have microwave field in 3-5min; e. finally, filtration, deposition, checking and collecting coal ash contains contaminant, discharging or circularly utilizing treated water. This invention ably utilizes the di-iron trioxide and so on transition metal oxide which contained in coal ash, forming the allied Fenton reagent with hydrogen dioxide; the multicellular structure of coal ash can absorb the microwave effectively, adsorbing-catalytic oxidation for organic matter by the stimulation of microwave, reaching the purpose of advanced oxidation treatment; improving the clearance for COD greatly; also saving the setting of biochemistry pool, reducing the dealing cost of waste-water.

Description

technical field [0001] The invention relates to a method for treating organic waste water (sewage), in particular to a method for utilizing fly ash to adsorb and degrade organic matters in waste water. Background technique [0002] Fly ash is a collection of spherical or microbeads, with a diameter of 1 μm to 100 μm, a specific gravity between 2.02 and 2.56, CaO and Fe 2 o 3 As the content increases, the specific gravity increases, while the specific gravity decreases when the amount of unburned charcoal increases. The whiteness of fly ash is 26-66, subject to Fe 2 o 3 content. BET specific surface area fluctuates at 0.7m 2 / g~36.6m 2 / g, affected by unburned charcoal, and increases with the amount of unburned charcoal. The BET specific surface area of ​​completely decarbonized fly ash is 0.5m 2 / g~1.5m 2 / g. SiO in fly ash 2 , Al 2 o 3 , Fe 2 o 3 The three components account for more than 70%, and the contents of CaO and MgO vary with the composition of raw c...

Claims

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Application Information

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IPC IPC(8): C02F1/28
CPCY02W10/37
Inventor 刘作华陶长元杜军刘仁龙孙大贵
Owner CHONGQING UNIV
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