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Landfill leachate treatment method and system

A technology for landfill leachate and a treatment method, which is applied in the field of landfill leachate treatment methods and systems, can solve the problem of high operating costs and achieve the effect of reducing operating costs

Pending Publication Date: 2019-05-28
武汉天源环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the above process, the effluent water quality is good, but the operating cost is high

Method used

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  • Landfill leachate treatment method and system
  • Landfill leachate treatment method and system
  • Landfill leachate treatment method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 , the embodiment of the present invention provides a landfill leachate treatment method, comprising the following steps:

[0029] S1, performing hydrolysis and acidification treatment on the leachate;

[0030] S2, denitrifying the leachate;

[0031] S3, nitrifying the leachate;

[0032] S4, the leachate after nitrification treatment is subjected to biochemical precipitation treatment;

[0033] S5, the supernatant obtained from the biochemical precipitation treatment is subjected to the first-stage membrane filtration treatment;

[0034] S6, performing oxidation treatment on the filtrate after the first-stage membrane filtration treatment;

[0035] In S7, the oxidized effluent is subjected to second-stage membrane filtration treatment to obtain a standard discharge liquid.

[0036] In the above method, specifically:

[0037] COD of landfill leachate cr High (up to 00-00mg / L), large organic load. In S1, hydrolytic acidification treatment can effec...

Embodiment 2

[0067] Such as figure 1 , the embodiment of the present invention provides a landfill leachate treatment system, including oil removal unit 100, hydrolytic acidification unit 200, denitrification unit 400, 300, nitrification unit 400, biochemical precipitation unit 500, first stage Membrane filtration unit 600 , oxidation unit 700 and second-stage membrane filtration unit 800 , the degreasing unit 100 is provided with a leachate inlet pipe, and the second-stage membrane filtration unit 800 is provided with a standard outlet pipe.

[0068] Wherein, the above-mentioned degreasing unit 100 is preferably an air flotation degreasing unit 100, and the degreasing effect is better.

[0069] The structure of the above-mentioned oil removal unit 100, hydrolysis acidification unit 200, denitrification unit 400, 300, nitrification unit 400, biochemical precipitation unit 500, first-stage membrane filtration unit 600, oxidation unit 700 and second-stage membrane filtration unit 800 can ref...

Embodiment 3

[0082] The above landfill leachate treatment method and system are described below with specific application examples:

[0083] For the leachate of a small garbage transfer station, the above-mentioned landfill leachate treatment method is used for treatment:

[0084] First, the landfill leachate stock solution enters the air flotation reaction zone of the air flotation degreasing unit 100, and ferrous sulfate heptahydrate and PAM (polyacrylamide) are added in the air flotation reaction zone, and the configuration concentration of ferrous sulfate heptahydrate is 20%. Gabi 10L / m 3 ; PAM configuration concentration 0.1%, dosing ratio 10L / m 3 , react for 5 minutes, enter the air flotation contact zone for steam-water mixing, then enter the air flotation separation zone, the total residence time of the air flotation degreasing unit 100 is 30 minutes, COD cr The removal rate is 32.6%, the removal rate of ammonia nitrogen is 10.1%, and the removal rate of total nitrogen is 17.2%. ...

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Abstract

The invention relates to a landfill leachate treatment method and system. The treatment method comprises the following steps that leachate is subjected to hydrolytic acidification treatment; the leachate is subjected to denitrification treatment; the leachate is subjected to nitrification treatment; the leachate after the nitrification treatment is subjected to biochemistry sediment treatment; supernate obtained by the biochemistry sediment treatment is subjected to the first level membrane filtration treatment; the leachate after the first level membrane filtration is subjected to oxidation treatment; and oxidation effluent water is subjected to the second level membrane filtration treatment, and standardized discharging liquid is obtained. The system comprises an oil removing unit, a hydrolytic acidification unit, a denitrification unit, a nitrification unit, a biochemistry sediment unit, a first level membrane filtration unit, an oxidation unit and a second level membrane filtrationunit, wherein the oil removing unit, the hydrolytic acidification unit, the denitrification unit, the nitrification unit, the biochemistry sediment unit, the first level membrane filtration unit, theoxidation unit and the second level membrane filtration unit are connected in the flow direction of the leachate in sequence. According to the landfill leachate treatment method and system, COD, ammonia nitrogen and total nitrogen in the leachate can be effectively removed, indexes such as the discharging water chrominance, the turbidity, the COD, the ammonia nitrogen and the total nitrogen of the standardized discharging liquid are superior, precision equipment such as a nano-filtration membrane and a reverse osmosis membrane are not needed, and the operation cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to the technical field of landfill leachate treatment, and specifically relates to a landfill leachate treatment method and system. Background technique [0002] At present, the garbage transfer station is an important hub for garbage collection and treatment, a hub connecting the source of garbage generation and the terminal treatment system, and an indispensable link in the domestic garbage collection, transportation and disposal system. With the acceleration of my country's urbanization process and the improvement of living standards, the output of waste is increasing year by year, and the number of waste transfer stations is increasing. At the same time, the country's environmental protection efforts are increasingly strengthened, and the leachate produced by waste transfer stations has increasingly become a problem for transfer stations in various places. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/06C02F101/16
Inventor 黄开明李红肖奇冷超群王旋
Owner 武汉天源环保股份有限公司
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