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Landfill leachate treatment process system and method

A landfill leachate and treatment method technology, which is applied in the field of landfill leachate treatment process systems, can solve the problems of increasing economic burden and difficulty in meeting discharge standards, and achieve the effects of achieving biodegradability, solving effluent chroma, and controlling treatment costs

Inactive Publication Date: 2019-01-04
AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, landfill leachate treatment technologies with more engineering applications include "pretreatment + MBR + nanofiltration / reverse osmosis" or "pretreatment + two-stage DTRO", etc., but membrane technology has inevitable defects, which will cause membrane failure. If the concentrated liquid is to be discharged up to the standard, it still needs further treatment, which will increase the economic burden
With the increase of landfill time, the water quality of landfill leachate will be very different in the early, middle, and late stages, so it is difficult to meet the discharge standards with a single physical, chemical or biochemical technology

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Garbage leachate (COD value is 10000, ammonia nitrogen value is 700) flows into the adjustment tank by itself, in the adjustment tank, the water volume is controlled by the liquid level gauge to 50L / h, and the stirring device is added to realize the homogenization of water quality, and the degradable part of COD and ammonia nitrogen;

[0050] (2) The wastewater from the adjustment tank flows into the coagulation sedimentation tank, first adjust the pH value of the wastewater to 5.5, add the coagulant as polyaluminium chloride, and the dosage is 2.5g / L; the coagulant aid is polypropylene Amide, the dosage is 1.0mg / L, after mixing evenly, it precipitates;

[0051] (3) The coagulation and sedimentation effluent flows into the three-dimensional electrolytic cell to oxidize the organic pollutants in the wastewater. The electrodes in the three-dimensional electrolysis device use stainless steel as the anode, graphite as the cathode, the distance between the electrodes is...

Embodiment 2

[0057] (1) Garbage leachate (COD value is 5500, ammonia nitrogen value is 1000) flows into the adjustment tank by itself, in the adjustment tank, the water volume is controlled by the liquid level gauge to 50L / h, and the stirring device is added to realize the homogenization of water quality, and the COD of the degradable part and ammonia nitrogen;

[0058] (2) The wastewater from the adjustment tank flows into the coagulation sedimentation tank, first adjust the pH value of the wastewater to 5.5, add the coagulant as polyaluminum chloride, and the dosage is 2.0g / L; the coagulant aid is polypropylene Amide, the dosage is 0.8mg / L, after mixing evenly, it precipitates;

[0059] (3) The coagulation and sedimentation effluent flows into the three-dimensional electrolytic cell to oxidize the organic pollutants in the wastewater. The electrodes in the three-dimensional electrolysis device are made of stainless steel as the anode and graphite as the cathode, the distance between the...

Embodiment 3

[0065] (1) Garbage leachate (COD value is 2850, ammonia nitrogen value is 1560) flows into the adjustment tank by itself, in the adjustment tank, the water volume is controlled by the liquid level gauge to 50L / h, and the stirring device is added to realize the homogenization of water quality, and the COD of the degradable part and ammonia nitrogen;

[0066] (2) The wastewater from the adjustment tank flows into the coagulation sedimentation tank, first adjust the pH value of the wastewater to 5.5, add the coagulant as polyaluminium chloride, and the dosage is 1.0g / L; the coagulant aid is polypropylene Amide, the dosage is 0.8mg / L, after mixing evenly, it precipitates;

[0067] (3) The coagulation and sedimentation effluent flows into the three-dimensional electrolytic cell to oxidize the organic pollutants in the wastewater. The electrodes in the three-dimensional electrolysis device use stainless steel as the anode, graphite as the cathode, the distance between the electrode...

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Abstract

The invention discloses a landfill leachate treatment process system and method. The method includes the process steps: (1) enabling landfill leachate to automatically flow into a regulating tank andhomogenizing water in the regulating tank; (2) enabling waste water in the regulating tank to automatically flow into a coagulative precipitation tank; (3) enabling coagulative precipitation effluentto automatically flow into a three-dimensional electrolytic tank and performing oxidizing reaction on organic pollutants in the waste water; (4) adjusting the pH (potential of hydrogen) value of the waste water to be 6.8-7.2, enabling the waste water to be suitable for biochemical treatment, and then enabling the waste water to automatically flow into an A / O biochemical system; (5) setting three-dimensional electrolysis behind a biochemical system to take deep treatment measures. After the effluent is subjected to ultraviolet disinfection, various indexes can reach discharge standards. The system and the method have the advantages of high efficiency, economical efficiency, easiness in operation management and the like.

Description

technical field [0001] The invention relates to a landfill leachate treatment process system and method, and belongs to the technical field of leachate treatment. Background technique [0002] The amount of urban garbage in my country is increasing year by year. If it is not properly disposed of, there may be hidden dangers of garbage siege. At present, garbage disposal methods include landfill, composting, and incineration, among which landfill is the main way of garbage disposal in my country. The leachate of the landfill is the main pollution produced by the landfill, which mainly comes from the following three aspects: (1) natural rainfall and runoff in the landfill; (2) the original water content of the garbage itself; (3) due to Moisture produced by anaerobic fermentation of microorganisms. [0003] Landfill leachate is a kind of high-concentration organic wastewater with complex components, which contains organic substances such as carcinogens, carcinogens, benzene ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/06
CPCC02F1/32C02F1/46114C02F1/4672C02F1/5245C02F1/56C02F1/66C02F3/302C02F9/00C02F2103/06C02F2203/006C02F2209/06C02F2209/08C02F2209/14C02F2301/08C02F2303/04C02F2305/10
Inventor 张颖朱春游陈琪高博叶明强乔瑞平
Owner AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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