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A method for co-processing landfill leachate and incineration fly ash

A technology for landfill leachate and incineration fly ash, which is applied in the field of treatment of landfill leachate and waste incineration fly ash, can solve the problem of undisclosed collaborative treatment of landfill leachate and incineration fly ash, landfill leachate and incineration fly ash, Heavy metals cannot be degraded and other problems, and achieve the effects of low requirements for liquid and feed materials, simple and fast process adjustment, and low maintenance costs

Inactive Publication Date: 2019-04-30
SICHUAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Landfill disposal not only occupies a large area of ​​land but also has a very high treatment cost (landfill management fee is 2,700 yuan / ton). In my country, the cost of fly ash treatment alone is as high as several billion each year, and fly ash landfill treatment cannot destroy dioxins. The heavy metals in it cannot be degraded. Once leakage occurs, it will cause great harm to the society, so there are certain hidden dangers. At present, the treatment of incineration fly ash in China is still in its infancy, and an efficient and reasonably priced technology is urgently needed to meet the needs of the society. Chinese market needs
[0009] In summary, the treatment of landfill leachate and incineration fly ash is still an international problem, and there is no method for co-processing landfill leachate and incineration fly ash in the prior art

Method used

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  • A method for co-processing landfill leachate and incineration fly ash
  • A method for co-processing landfill leachate and incineration fly ash
  • A method for co-processing landfill leachate and incineration fly ash

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Experimental program
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Effect test

Embodiment 1

[0046] Table 2 shows the results of changes in landfill leachate indexes before and after treatment by this process;

[0047] The results of the heavy metal leaching concentration before and after this process are shown in Table 3.

[0048] Table 2: Index changes before and after the landfill leachate treatment of Example 1

[0049]

[0050] Table 3: Index changes before and after the treatment of waste incineration fly ash in Example 1

[0051]

[0052]In embodiment 1, the main indicators of water quality of leachate after treatment, such as: chromaticity, COD, BOD, suspended solids and ammonia nitrogen content all meet the requirements of the National Standard of the People's Republic of China "Sewage Comprehensive Discharge Standard" GB8978-1996 (the second category). The maximum allowable emission concentration of pollutants is required by the secondary standard); the treated fly ash of waste incineration, the main heavy metal toxic leaching concentration indicators...

Embodiment 2

[0054] The results of changes in the indicators of landfill leachate before and after treatment by this process are shown in Table 4.

[0055] The results of heavy metal leaching concentration before and after this process are shown in Table 5.

[0056] Table 4: Index changes before and after the landfill leachate treatment of Example 2

[0057]

[0058] Table 5: Index changes before and after the treatment of waste incineration fly ash in Example 2

[0059]

[0060] In embodiment 2, the main indicators of water quality of leachate after treatment, such as: chromaticity, COD, BOD, suspended solids and ammonia nitrogen content all meet the requirements of the National Standard of the People's Republic of China "Sewage Comprehensive Discharge Standard" GB8978-1996 (Second Class The maximum allowable emission concentration of pollutants is required by the secondary standard); the treated fly ash of waste incineration, the main heavy metal toxic leaching concentration indic...

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Abstract

The invention discloses a method for synergistic treatment of landfill leachate and incineration fly ash. According to the technological method, the following two modules, namely a primary processing module using an adsorption-oxidation-carbonation reaction bed as a core and a deep treatment module using a reverse osmosis vibrating membrane as a core, are included, wherein the primary processing module using the adsorption-oxidation-carbonation reaction bed as the core includes two stages, namely an adsorption oxidation reaction stage and an accelerated carbonation reaction stage. The method makes use of the adsorption-oxidation principle, the accelerated carbonation principle and the reverse osmosis membrane vibration principle, the three principles are integrated to form a simple and efficient process, drawbacks, which are difficult to overcome, existing in market technologies are thus overcome, and the landfill leachate and the incineration fly ash are allowed to reach corresponding emission standards after treatment.

Description

technical field [0001] The invention relates to the technical field of processing landfill leachate and waste incineration fly ash, in particular to a method for co-processing landfill leachate and incineration fly ash. Background technique [0002] With a large population in China, with the rapid development of urbanization, the amount of domestic waste generated is also increasing rapidly, and garbage disposal has become a very concerned issue for local governments. Landfill treatment technology and waste incineration treatment technology will produce landfill leachate. Landfill leachate has the following characteristics: (1) The composition of pollutants is complex and changeable, and the water quality changes greatly: the leachate from the incineration plant is relatively fresh and has not undergone anaerobic fermentation and hydrolysis. , acidification process, through mass spectrometry analysis, there are more than 100 kinds of organic substances in landfill leachate, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04B01D53/78B01D53/62C02F103/06C02F1/44
CPCB01D53/62B01D53/78B01D2257/504B01D2258/0283C02F1/28C02F1/441C02F1/78C02F2103/06
Inventor 杨为中孙晓龙李豫军何拥葛利丫王川赵杰
Owner SICHUAN UNIV