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Catalytic ozonation method and system for treating membrane filtration concentrated solution by utilizing reaction medium-range wastes

A technology of ozone oxidation and concentrated liquid, which is applied in chemical instruments and methods, neutralized water/sewage treatment, physical/chemical process catalysts, etc. Advanced problems, to achieve the effect of taking into account both technical and economical performance and prolonging service life

Active Publication Date: 2022-04-01
WELLE ENVIRONMENTAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to provide a catalytic ozonation method and its system for treating membrane filtration concentrates with wastes in the middle course of the reaction. The removed metal salt ions realize high value-added utilization. By modifying the saturated activated carbon, the generation of synergistic catalysts that can be used in sewage ozone treatment is realized, and the efficient recycling of waste solids is realized. The high cost of the catalyst, the large amount of waste disposal in the middle of the reaction, and the easy scaling of the catalyst provide an important guarantee for the follow-up project to realize the full quantification and harmless treatment of the membrane filtration concentrate

Method used

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  • Catalytic ozonation method and system for treating membrane filtration concentrated solution by utilizing reaction medium-range wastes
  • Catalytic ozonation method and system for treating membrane filtration concentrated solution by utilizing reaction medium-range wastes
  • Catalytic ozonation method and system for treating membrane filtration concentrated solution by utilizing reaction medium-range wastes

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Embodiment 1

[0072] Select the specific surface area as 560m 2 / g, coal-based activated carbon with an iodine value of 860 is used as an adsorbent, and the particle density of activated carbon is 0.72g / cm 3 , the particle size is 80-90mm, and the sphericity is 70-80%. The influent water is the clear liquid after the membrane filtration concentrate has been treated by coagulation and sedimentation. The main indicators of water quality are shown in Table 1. Pass the membrane filter concentrated solution into the adjustment tank 1, adjust the water quality to pH 8, and stir the first agitator 1-1 at a slow speed of 50 rpm to ensure the balance of the subsequent reaction water quality, and the outlet water of the adjustment tank 1 passes through the first water inlet pump 2. After pressurization, it is passed into the first filter for solid-liquid separation. The filtered filtrate enters the adsorption reaction tank 4, and a small amount of sludge formed in the adjustment tank 1 is regularly ...

Embodiment 2

[0081] Select the specific surface area as 1100m 2 / g, coal-based activated carbon with an iodine value of 950 as the adsorbent, and the particle density of the activated carbon is 1.0g / cm 3 , the particle size is 50-60mm, and the sphericity is 65-75%. The influent water is the clear liquid after the membrane filtration concentrate has been treated by coagulation and sedimentation. The main indicators of water quality are shown in Table 1. Pass the membrane filter concentrated solution into the adjustment tank 1, adjust the water quality so that the pH is 8.5, and stir at a slow speed of 40 rpm through the first agitator 1-1 to ensure that the subsequent reaction water quality is balanced, and the effluent of the adjustment tank 1 passes through the first inlet After the water pump 2 is pressurized, it is passed into the first filter for solid-liquid separation, and the filtered filtrate enters the adsorption reaction tank 4, and a small amount of sludge formed in the regulat...

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Abstract

The invention relates to a catalytic ozonation method and a catalytic ozonation system for treating a membrane filtration concentrated solution by using reaction medium-range wastes, and the catalytic ozonation method comprises the following steps: (1) a water quality regulation unit, (2) an activated carbon adsorption unit, and (3) a membrane filtration concentrated solution treatment unit, feeding the separated wastewater into a first-stage reactor, and taking saturated activated carbon after adsorption as a catalyst precursor; (3) a catalyst preparation unit: drying and roasting the activated carbon subjected to adsorption saturation to obtain a primary catalyst; soaking Co, Cu and Ce in the primary catalyst precursor, and then drying and roasting to obtain a secondary catalyst; (4) a first-stage catalytic ozonation unit: performing a catalytic ozonation reaction on the separated wastewater; and (5) a second-stage catalytic ozonation unit: performing a catalytic ozonation reaction on the wastewater subjected to the first-stage catalytic oxidation. The method provides important guarantee for realizing full-quantization and harmless treatment of the membrane filtration concentrated solution in subsequent engineering.

Description

technical field [0001] The invention relates to a catalytic ozonation method and system for treating membrane filtration concentrated liquid by using mid-range reaction waste, and belongs to the technical field of treating landfill leachate membrane filtration concentrated liquid. Background technique [0002] Landfill leachate is a kind of refractory and high-concentration organic wastewater with complex components. It has the typical characteristics of high pollution load and comprehensive pollution: foul smell, dark color, pH about 6-8, high COD load, and poor biodegradability. The concentration of ammonia nitrogen is high, containing a large amount of dissolved solids and heavy metals, and the fluctuation range of physical and chemical properties is often large. At present, the landfill leachate treated by membrane technology accounts for more than 1 / 2 of the total leachate treatment in my country, and the concentrated liquid produced in China is about 5 million tons eve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01J23/89C02F1/66C02F1/28C02F1/78C02F103/06
CPCY02W10/10
Inventor 韩颖姬源源杨虎君丁歆瑶杨晔柳德军谢志军
Owner WELLE ENVIRONMENTAL GRP CO LTD
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