Treatment method and device of landfill leachate concentrate

A landfill leachate and treatment device technology, which is applied in the landfill leachate and other high-concentration organic wastewater industries, the treatment of landfill leachate concentrate, and the field of landfill leachate treatment in incineration power plants, can solve the problem of high salinity in biochemical treatment, High operating costs, easy corrosion of equipment, etc., to achieve the effect of recycling, saving operating costs, and avoiding membrane surface pollution

Inactive Publication Date: 2015-07-22
EVERBRIGHT ENVIRONMENTAL PROTECTION TECH RES INST SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although mechanical compression evaporation has certain applications, due to high operating costs and the phenomenon of easy corrosion of equipment, it is basically out of service.
The Fenton oxidation process also has certain applications, but the biochemical treatment after Fenton oxidation is difficult to operate normally due to the high salt content

Method used

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  • Treatment method and device of landfill leachate concentrate
  • Treatment method and device of landfill leachate concentrate
  • Treatment method and device of landfill leachate concentrate

Examples

Experimental program
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Embodiment 1

[0047] In order to solve the problems existing in the prior art, the present invention provides a method for treating the landfill leachate concentrate, wherein the landfill leachate concentrate is a conventional method to perform nanofiltration and / or reverse osmosis on the landfill leachate Concentrated water obtained after treatment, among them, the treatment method of landfill leachate is as follows figure 1 As shown, the process flow is that MBR effluent directly receives filtration and reverse osmosis process, the yield of nanofiltration concentrate is about 15% to 20% of the influent water, and the yield of reverse osmosis concentrate is about 20% to 20% of the reverse osmosis influent 25%, and the total concentrate production rate is about 32% to 40%. For example, the daily treatment scale of the leachate treatment station is 1000m3 / d, the concentrate output is about 320-400m 3 / d.

[0048] The "dual-membrane method" of nanofiltration + reverse osmosis, as a filtrat...

Embodiment 2

[0074] The present invention also provides a concentrate treatment device based on the above method, comprising:

[0075] The chemical softening unit is used to chemically soften the concentrated liquid to reduce the hardness of the landfill leachate concentrated liquid;

[0076] A microfiltration membrane unit is used to filter the effluent from the chemical softening unit to remove suspended solids in the concentrate;

[0077] The reverse osmosis unit includes a dish-type reverse osmosis membrane, which is used for performing reverse osmosis treatment on the effluent of the microfiltration membrane unit.

[0078] Wherein, the chemical softening unit is composed of an intermediate pool, a mixing pool, and a reaction pool. After the nanofiltration and reverse osmosis concentrates are mixed in the intermediate pool, they enter the mixing pool. The mixing pool mainly adds calcium hydroxide and calcium hydroxide The final pH is controlled at about 11-11.5, and the landfill leach...

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Abstract

The invention relates to a treatment method and a device of landfill leachate concentrate. The method comprises the following steps: Step S1: carrying out chemical softening treatment on the concentrate to reduce hardness of the concentrate, Step S2: filtering effluent of Step S1 with a microfiltration membrane to remove suspended solids from the concentrate, and Step S3: carrying out reverse osmosis treatment on effluent of Step S2 with a disc tubular reverse osmosis membrane to form recycled effluent. The method and the device have the following advantages: 1, a 'chemical softening, microfiltration membrane and DTRO (Disk Tubular Reverse Osmosis)' technology is employed for treating the nanofiltration and reverse osmosis concentrate, the fresh water yield of a whole system is increased, the recycling of water resources is achieved, and operating cost of a power plant is saved; and 2, the 'chemical softening, microfiltration membrane and DTRO' technology is employed for treating the nanofiltration and reverse osmosis concentrate, so that the concentrate is reduced, and the predicament that the yield of the concentrate is high, and the power plant cannot eliminate the concentrate is solved.

Description

technical field [0001] The present invention relates to the field of sewage treatment. Specifically, the present invention relates to a method and device for treating landfill leachate concentrate. The present invention is especially applicable to the waste leachate treatment industry of incineration power plants, and can also be applied to landfill leachate and other High concentration organic wastewater industry. Background technique [0002] The gas released from the landfill leachate incineration power plant has a strong stench, which is harmful to the human body and can cause nausea, hematuria, dizziness and other symptoms. If it is not handled properly, it will easily pollute the surrounding water environment and threaten the health of residents. Bad environmental and social incidents will also occur. [0003] At present, the mainstream treatment process of leachate in waste incineration power plants is pretreatment + anaerobic + MBR (membrane bioreactor) + advanced t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01D61/14
Inventor 高用贵安瑾任艳双高兴斋李成海宗海峰张林江景杰陆红
Owner EVERBRIGHT ENVIRONMENTAL PROTECTION TECH RES INST SHENZHEN CO LTD
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