Landfill leachate treatment method

A technology for landfill leachate and a treatment method, which is applied in the field of landfill leachate treatment, can solve the problems of increasing the difficulty of landfill leachate treatment, high conductivity of landfill leachate, and large area of ​​treatment facilities, so as to improve the biochemical efficiency of landfill leachate. properties and stability, improving the effect of biochemical treatment, and promoting the effect of degradation efficiency

Inactive Publication Date: 2020-01-21
GUANGREEN ENVIRONMENTAL PROTECTION ENG
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] Landfill leachate has high electrical conductivity and high concentrations of pollution indicators such as COD, ammonia nitrogen, and TN, so wastewater is not easy to biochemically treat
[0003] In the prior art, in the treatment method of leachate, the commonly used physical and chemical treatment method mainly removes solid suspended matter and a small amount of other pollutants in wastewater, and the load of biochemical treatment is still very large, so it needs a longer residence time to achieve The purpose of degrading various pollution factors, the treatment facility occupies a large area
In addition, the wastewater with too high conductivity will cause the biochemical system to be unstable, or even cause the system to collapse. It will also cause the membrane system to have a low water production rate and thus fail to meet the requirements
[0004] In the prior art, since the pollutants of the concentrated liquid are difficult to be effectively treated, long-term return to the tank to the landfill area will gradually increase the difficulty in the treatment of landfill leachate; while part of the treatment method uses evaporation, there is a large energy consumption of the system, and the evaporator is easy to The problem of clogging and unable to run continuously and stably

Method used

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  • Landfill leachate treatment method

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Effect test

Embodiment 1

[0035] A treatment method for landfill leachate, such as figure 1 As shown, it includes the following steps:

[0036] Step 1. Regulating pool treatment: Landfill leachate enters the regulating pool to regulate water volume and water quality; among them, the interior of the regulating pool is equipped with a mechanical stirring device, which makes the water surface form a hydraulic jump and entrains air to decompose macromolecules While preventing organic pollutants from settling suspended particles, the effluent enters the electrocoagulation air flotation device;

[0037] Step 2. Electrocoagulation treatment: After being regulated by the regulating tank, the treatment liquid enters the electrocoagulation air flotation device quantitatively through the lift pump, and removes COD, TDS and ammonia nitrogen pollutants through electrolytic oxidation and adsorption; among them, the electrocoagulation air flotation device includes Reaction device, the reaction device is fixed with a...

Embodiment 2

[0047] A treatment method for landfill leachate, such as figure 1 As shown, it includes the following steps:

[0048] Step 1. Regulating pool treatment: Landfill leachate enters the regulating pool to regulate water volume and water quality; among them, the interior of the regulating pool is equipped with a mechanical stirring device, which makes the water surface form a hydraulic jump and entrains air to decompose macromolecules While preventing organic pollutants from settling suspended particles, the effluent enters the electrocoagulation air flotation device;

[0049] Step 2. Electrocoagulation treatment: After being regulated by the regulating tank, the treatment liquid enters the electrocoagulation air flotation device quantitatively through the lift pump, and removes COD, TDS and ammonia nitrogen pollutants through electrolytic oxidation and adsorption; among them, the electrocoagulation air flotation device includes Reaction device, the reaction device is fixed with a...

Embodiment 3

[0059] A treatment method for landfill leachate, such as figure 1 As shown, it includes the following steps:

[0060] Step 1. Regulating pool treatment: Landfill leachate enters the regulating pool to regulate water volume and water quality; among them, the interior of the regulating pool is equipped with a mechanical stirring device, which makes the water surface form a hydraulic jump and entrains air to decompose macromolecules While preventing organic pollutants from settling suspended particles, the effluent enters the electrocoagulation air flotation device;

[0061] Step 2. Electrocoagulation treatment: After being regulated by the regulating tank, the treatment liquid enters the electrocoagulation air flotation device quantitatively through the lift pump, and removes COD, TDS and ammonia nitrogen pollutants through electrolytic oxidation and adsorption; among them, the electrocoagulation air flotation device includes Reaction device, the reaction device is fixed with a...

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Abstract

The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate treatment method. The landfill leachate treatment method comprises the following steps: step 1, treatment in an adjusting tank; step 2, electric flocculation treatment; step 3, anaerobic tank treatment; step 4, treatment in an anoxic tank; 5, aerobic treatment on the MBR membrane reactor; step 6, filter treatment; step 7, NF membrane and RO membrane treatment; and step 8, treatment on the landfill leachate concentrated solution. The landfill leachate treatment method can effectively reduce the conductivity and part of COD, ammonia nitrogen and other pollutants in the leachate; the biodegradability and stability of the landfill leachate are improved, the occupied area of a biochemical treatment system is reduced under the same condition, the service life of a membrane system is prolonged, the water production rate of the membrane system is improved, and meanwhile, the problems encountered in recharging and evaporation of a concentrated solution are effectively solved.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a treatment method for landfill leachate. Background technique [0002] Landfill leachate has high electrical conductivity and high concentrations of pollution indicators such as COD, ammonia nitrogen, and TN, so wastewater is not easy to biochemically treat. [0003] In the prior art, in the treatment method of leachate, the commonly used physical and chemical treatment method mainly removes solid suspended matter and a small amount of other pollutants in wastewater, and the load of biochemical treatment is still very large, so it needs a longer residence time to achieve For the purpose of degrading various pollution factors, the treatment facilities occupy a large area. In addition, the wastewater with too high conductivity will also cause the instability of the biochemical system, and even the consequences of system collapse, which will also cause the wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30C02F103/06
CPCC02F9/00C02F1/465C02F1/4672C02F1/441C02F1/442C02F1/001C02F1/04C02F3/30C02F2103/06C02F2101/30
Inventor 黄建林李传家邵为戴双建徐祖宏鲁锐
Owner GUANGREEN ENVIRONMENTAL PROTECTION ENG
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