Method, device and system for treating landfill leachate

A wastewater treatment and organic wastewater treatment technology, which is applied in water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of low oxidant contact efficiency, inability to continuously discharge water, and a large amount of concentrated liquid. Achieve the effects of no secondary pollution, efficient and rapid degradation, and low cost

Active Publication Date: 2019-11-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method, device and system for organic wastewater treatment, the purpose of which is to generate active free radicals in situ based on the synergistic effect of solid-supported palladium-iron ore, and degrade organic wastewater. Organic pollutants in wastewater, thereby solving the problem that the existing osmotic membrane technology can continuously discharge water but produce a large amount of concentrated liquid, while the advanced oxidation technology does not produce concentrated liquid, but there are problems such as inability to continuously discharge water, low contact efficiency of oxidants, and Serious technical problems such as oxidant consumption

Method used

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  • Method, device and system for treating landfill leachate
  • Method, device and system for treating landfill leachate
  • Method, device and system for treating landfill leachate

Examples

Experimental program
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Effect test

Embodiment 1

[0097] An organic wastewater treatment system, such as figure 1 As shown, it includes a gas generating device 1, a gas buffer tank 2, an air pump 3, an organic waste water storage tank 4, a liquid pump 5, a molecular hydrogen oxygen participating palladium catalytic oxidation reactor 6, a gas washing bottle 7, and an effluent collecting tank 8.

[0098] Molecular hydrogen oxygen participates in the palladium catalytic oxidation reactor 6 as figure 2 As shown in the cylinder, the molecular hydrogen and oxygen participate in the palladium catalytic oxidation reactor 6, which is made of plexiglass, and includes: a gas-liquid mixing zone 61, a catalytic oxidation zone 62 and a gas-liquid separation zone 63 from bottom to top. Bolt connection is adopted, wherein: the gas-liquid mixing zone 61 is used for mixing the gas and organic wastewater required for the reaction, the catalytic oxidation zone 62 is used for removing pollutants in the organic wastewater by catalytic oxidation, ...

Embodiment 2

[0121] The organic waste water treatment system described in Example 1 is used to process the concentrated liquid of garbage leachate taken from a municipal solid waste landfill, its COD is 950~1000mg / L, pH is 7.6~8, and other equipment and parameters are implemented with the same Example 1, using siderite, hematite and magnetite as the iron ore filler layer respectively, and the dosage is 45 grams, using sulfuric acid to adjust the pH to 3, and controlling the water inlet rate through a liquid pump to make the hydraulic retention The time (that is, the time required for the leachate to pass from the liquid inlet to the liquid outlet) is 4 hours.

[0122] By comparing the COD removal results of different iron ores, it was found that the four iron ores can all obtain higher COD removal rates, and the treatment results are shown in Table 2:

[0123] Table 2 Comparison of COD removal rates of different iron ores

[0124] Types of iron ore Hematite magnetite Sider...

Embodiment 3

[0127] The waste water treatment method and system described in Example 1 were used to treat the leachate from a municipal solid waste landfill. The COD was 391-445 mg / L and the pH was 7.6-8.2.

[0128] When the gas circulation rate (flow rate) is in the range of 10-50mL / min, a higher COD removal rate can be obtained; the results are shown in Table 4:

[0129] Table 3 Comparison of COD removal rates at different gas circulation rates

[0130] Gas circulation rate (mL / min) 10 20 30 40 50 COD removal rate (%) 30.0 39.6 46.6 47.4 54.5

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Abstract

The invention discloses a landfill leachate treatment method, device and system. The method comprises the technical process that based on the synergistic effect of a palladium catalyst supported on the surface of aluminum oxide and natural iron ores (including hematite, magnetite, siderite and the like), the device is fixed at the appropriate position of a reaction system, active free radicals (mainly hydroxyl radicals) are produced in site under the condition of hydrogen and oxygen leading, and contaminants including organic matter in wastewater such as leachate and dye wastewater are removed through interface mass transfer among gas, solid and liquid and relevant interface reaction. According to the organic wastewater treatment method, a good organic pollutant degrading effect is obtained through the synergistic effect of the fixedly supported palladium and the iron ores, and the continuous wastewater output and discharging process is achieved. In the organic wastewater treatment method, hydrogen and oxygen which do not participate in the reaction can be cyclically used, the fixedly supported catalyst can be repeatedly used, and the treatment cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and more specifically relates to a treatment method, device and system for organic waste water-garbage leachate. Background technique [0002] With the development of industry, pesticides and fertilizers, and various petroleum-derived materials industries, the pollution of water bodies by refractory organic pollutants such as phenols has become increasingly serious. Compared with general wastewater, the content of pollutants in this type of wastewater is relatively low, but it is difficult to be treated by most wastewater treatment systems, and the problem of its advanced treatment and discharge has not been effectively resolved. People who drink water containing trace amounts of organic pollutants for a long time are more likely to suffer from digestive tract cancer. At present, several commonly used wastewater treatment processes at home and abroad have unsatisfactory treatment effects on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/66C02F101/30
CPCC02F1/66C02F1/725C02F2101/30C02F2305/023
Inventor 陈朱琦王华斌俞瑛健陈朱蕾廖朱玮
Owner HUAZHONG UNIV OF SCI & TECH
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