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Method of proceeding percolate treatment using ventilation buring layer

A leachate and landfill technology, which is applied in the treatment of polluted groundwater/leachate, sustainable biological treatment, aerobic and anaerobic process treatment, etc. Complexity and other issues, to achieve the effect of reducing implementation costs, implementing cost control, and improving feasibility

Active Publication Date: 2010-12-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bioreactor landfill (Bioreactor landfill) technology has developed the above method. It uses the landfill as a bioreactor and purifies the leachate through the circulation of the leachate in the landfill ('Landfill bioreactor: historical perspective , fundamental principles, and new horizons in design and operations'. Pohland, F.G., 1995. In Landfill Bioreactor Design and Operation Sem.Proc., EPA / 600 / R-95 / 146, 9-24), but because the landfill usually The metabolic environment is anaerobic, so this method can only purify oxygen-consuming organic matter, but not ammonia nitrogen
Price et al. (‘Nitrogen management in bioreactor landfills’ Price, G.A., M.A.Barlaz, and G.R.Hater, 2003. Waste Management23, 675-688.) biologically nitrify the leachate outside the landfill first, and then nitrate nitrogen The leachate is recirculated and refilled into the landfill pile, and the leachate denitrification of nitrate nitrogen into nitrogen gas is denitrified by using the anoxic condition in the landfill pile. However, this method still needs the traditional biological nitrification outside the landfill pile. The device completes the denitrification treatment of ammonia nitrogen in the leachate, which complicates the leachate circulation and recharge treatment technology

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  • Method of proceeding percolate treatment using ventilation buring layer
  • Method of proceeding percolate treatment using ventilation buring layer
  • Method of proceeding percolate treatment using ventilation buring layer

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0024] The implementation method in the new landfill is as follows:

[0025] The first step is to select the first landfill unit in the landfill area as a special ventilated leachate treatment unit. The effective landfill depth of this unit should be greater than 3m, but not greater than 6m; The daily average value of the year in which the landfill is expected to produce the largest amount of leachate (V max ) determined, the relationship between the two is V max / S=0.02~0.04.

[0026] The plane area of ​​the special leachate treatment unit is less than 4000m2 2 , there is no need to divide the unit, if the total area is greater than 4000m 2 , the unit needs to be partitioned, but the area of ​​each partition should not be less than 2000m2 2 . The meaning of zoning is: different zones are separated by earth dams covered with waterproof cushioning materials, leachate in each zone is collected and recharged independently, and ventilation and gas collection piping systems sh...

Embodiment 2

[0038] Implementation methods in established landfills:

[0039] Firstly, the storage pool should be separated or rebuilt to form a general storage area and a processing unit storage area with a capacity that meets the requirements (specifically the same as in Embodiment 1). Then, build a special-purpose ventilation treatment unit. If the unit is arranged in an area that has not yet been landfilled in the site, its construction method is consistent with Embodiment 1 in the aforementioned new landfill. After excavating old garbage that has been buried for more than 3 years, it will be refilled into this unit, so that the garbage in this unit does not need to be accelerated and stabilized, but can be directly used to treat the leachate generated in the site; if the unit must be installed in the site In addition to laying a layer of graded gravel (5-15mm) with a thickness of 0.1m on the garbage layer, instead of the aforementioned groundwater drainage layer 2, and at the same tim...

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Abstract

The present invention relates to a method for making percolation liquor treatment by utilizing draught landfill layer, in particular, it relates to a method for treating percolation liquor produced in urban domestic refuse landfill yard. It is characterized by that said invention adopts the following main measures: creating special-purpose draught landfill unit to make forced draught, forming aerobic, anoxybiotic and anaerobic environmental condition to produce microbial pool in landfill layer, promoting metabolism of microbial pool to remove oxygen consumption organics in the percolation liquor, and utilizing nitrification and denitrification reaction to remove ammonia nitrogen in the percolation liquor. The COD of treated outlet water is less than 1g / L and ammonia nitrogen content is less than 0.005g / L.

Description

technical field [0001] The invention relates to a leachate treatment method for landfill of municipal domestic garbage. Background technique [0002] Landfill is the most widely used domestic waste disposal technology, and leachate is the most important secondary pollutant produced during its treatment. These domestic waste landfill leachates are mainly oxygen-consuming organic matter and ammonia nitrogen. The traditional treatment method is: after the domestic waste landfill leachate is collected, it is treated outside the landfill pile ('Landfill leachate treatment.'Keenan J.D., R.L.Steiner, and A.A.Fungaroli.Journal of the Water Pollution Control Federation56, 27-33 , 1984), but the processing cost is high. Bioreactor landfill (Bioreactor landfill) technology has developed the above method. It uses the landfill as a bioreactor and purifies the leachate through the circulation of the leachate in the landfill ('Landfill bioreactor: historical perspective , fundamental pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F103/06
CPCY02W10/10
Inventor 何品晶邵立明李国建吕凡
Owner TONGJI UNIV