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A method and system for the full treatment of landfill leachate

A technology for a landfill leachate and a treatment method, which is applied in the field of a full-scale landfill leachate treatment method and a full-scale treatment system, can solve the problems of low acidity, low concentration of by-products, lack of a full-scale landfill leachate treatment process, etc. The technical advantages are obvious, the effect of improving the effect

Active Publication Date: 2022-05-03
成都硕特科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese invention patent CN111661979A discloses a leachate resource treatment method and equipment. This method can propose a comprehensive resource utilization of leachate with a high concentration of pollutants, and achieve zero discharge of leachate. However, this method uses gaseous Separation membrane deamination, this process will produce a large amount of ammonium sulfate by-products, the by-products are low in concentration and acidity, and cannot be directly used as fertilizers, and need to be disposed of separately
[0006] It can be seen that there is still a lack of full-volume treatment of landfill leachate in the prior art, and the active development of researchers is urgently needed.

Method used

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  • A method and system for the full treatment of landfill leachate
  • A method and system for the full treatment of landfill leachate
  • A method and system for the full treatment of landfill leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like figure 1 As shown, a landfill leachate full treatment system includes a regulating tank, the landfill leachate is connected to a pretreatment system through a lift pump, and the pretreatment system is connected to a DTRO system. The DTRO system includes a DTRO membrane module, and the inlet port of the DTRO membrane module Connect the pretreatment system, the permeate outlet of the DTRO membrane module is connected to the outlet, the concentrate outlet of the DTRO membrane module is connected to the water inlet of the DTCOD membrane treatment system, and the permeate outlet of the DTCOD membrane treatment system The terminal is connected to the enhanced deamination system, and the outlet of the concentrated solution of the DTCOD system is connected to the evaporation crystallization system. The evaporation crystallization system includes an MVR evaporation system and a drying system. The outlet of the MVR evaporation system is connected to a drying system. The syst...

Embodiment 2

[0048] Embodiment 2 is the same as Example 1, and the difference is that in order to further realize the filtration of landfill leachate completely, when the landfill leachate is pretreated, some impurities in the landfill leachate are removed through a quartz sand filter, that is to say , the pretreatment system is connected to the quartz sand filter, and the output end of the quartz sand filter is connected to the DTRO membrane module. Further, during the filtration process of the quartz sand filter, the frequency of backwashing can be judged by the pressure difference between the inlet and outlet of the quartz sand filter. / (m 2 s), the backwash pressure is 0-0.3MPa, and the strength of backwash water is 5-20L / (m 2 ·s), the backwash water pressure is 0.15-0.3MPa. Specific parameters are adjusted according to actual needs.

[0049] The treatment process of the above landfill leachate full treatment system is as follows:

[0050] S1. The landfill leachate in the adjustmen...

Embodiment 3

[0057] Embodiment 3 is the same as Embodiment 2, the difference is that in order to further realize the high concentration of pollutants, the output end of the quartz sand filter is connected to the core filter, and the output end of the core filter is connected to the The DTRO membrane module described above. After the landfill leachate filtered through the quartz sand filter is added with antiscalant, it is first filtered through a core filter with a filtration accuracy of 5um, and then processed through the DTRO system for membrane separation. The dosing ratio of scale inhibitor is determined according to the content of sulfate and carbonate in the raw water. The preferred mass ratio is carbonate and sulfate: scale inhibitor = 7-14:1.

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Abstract

The invention discloses a method and system for full treatment of landfill leachate, comprising the following steps: S1. After pretreatment, the landfill leachate is passed into a DTRO system for membrane separation treatment to obtain qualified discharge water and concentration of landfill leachate liquid; S2, pass the concentrated landfill leachate into the DTCOD system to obtain the DTCOD permeate and the DTCOD concentrate; S3, conduct the evaporation and crystallization treatment on the DTCOD concentrate, and transport the obtained product out; S4, transfer the DTCOD permeate Performing enhanced deamination treatment to obtain enhanced deamination water; S5, subjecting the enhanced deamination water to deep electrolytic oxidation treatment to obtain discharge water. The invention can remove pollutants such as ammonia nitrogen and organic matter in the landfill leachate, and all the produced water can be discharged up to the standard, with a discharge rate of 98%. The operating cost is lower than the existing landfill leachate treatment technology, and the full treatment of landfill leachate is realized.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a method and a system for the full treatment of landfill leachate. Background technique [0002] Affected by various factors such as the type of landfill, landfill method, landfill scale, landfill cycle, and weather changes, the leachate of domestic waste landfill has the characteristics of large changes in water quality and quantity, complex composition, high concentration of organic matter, NH3- The N concentration is high, and it contains high salinity and heavy metals. The pollution of the surrounding environment is becoming more and more serious. It must be strictly treated to meet the relevant national and local standards and specifications before it can be discharged into the designated receiving water body or circulated. use. [0003] At present, the combined process of "pretreatment + biological treatment + membrane treatment" is generally used for l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F103/06
Inventor 黄兴俊胡君杰杨敏倪金元史梦云
Owner 成都硕特科技股份有限公司
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