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A treatment method for landfill leachate

A technology of landfill leachate and treatment method, which is applied in the field of waste treatment, and achieves the effects of wide applicability, high degree of industrialization, and stable discharge up to standard

Active Publication Date: 2015-07-29
北京博力扬环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Key technical issues of landfill leachate treatment: how to remove high concentration ammonia nitrogen from landfill leachate to adapt to subsequent biochemical treatment? How to remove the biological inhibition of toxic and harmful substances in landfill leachate? How to effectively improve the removal efficiency of biochemical treatment for pollutants? How to effectively remove the refractory biodegradable substances after biochemical treatment?

Method used

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  • A treatment method for landfill leachate
  • A treatment method for landfill leachate
  • A treatment method for landfill leachate

Examples

Experimental program
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Effect test

Embodiment 1

[0042] After the landfill leachate is collected in the adjustment tank, high-efficiency dissolved air flotation is carried out; slaked lime is added to the landfill leachate after air flotation treatment for alkali adjustment treatment, and the pH is adjusted to 11, and the alkali residue is returned to the garbage Landfill: Send the landfill leachate after alkali adjustment to the ammonia nitrogen molecular sieve separator. After removing suspended impurities and colloidal organic substances in the landfill leachate, separate the ammonia nitrogen molecular sieve and recover ammonia nitrogen by adding sulfuric acid to form ammonium sulfate; recover ammonia nitrogen The final landfill leachate enters the nano bioreactor for biochemical treatment to remove organic matter, nitrogen, and phosphorus in the landfill leachate; the landfill leachate after biochemical treatment is subjected to multi-stage countercurrent adsorption with modified carbon, and then discharged up to the stand...

Embodiment 2

[0044] After the landfill leachate is collected in the adjustment tank, high-efficiency dissolved air flotation is carried out; slaked lime is added to the landfill leachate after air flotation treatment for alkali adjustment treatment, and the pH is adjusted to 12, and the alkali residue is returned to the garbage Landfill: Send the landfill leachate after alkali adjustment to the ammonia nitrogen molecular sieve separator. After removing suspended impurities and colloidal organic substances in the landfill leachate, separate the ammonia nitrogen molecular sieve and recover ammonia nitrogen by adding sulfuric acid to form ammonium sulfate; recover ammonia nitrogen The final landfill leachate enters the nano bioreactor for biochemical treatment to remove organic matter, nitrogen, and phosphorus in the landfill leachate; the landfill leachate after biochemical treatment is subjected to multi-stage countercurrent adsorption with modified carbon, and then discharged up to the stand...

Embodiment 3

[0046] After the landfill leachate is collected in the adjustment tank, high-efficiency dissolved air flotation is carried out; slaked lime is added to the landfill leachate after air flotation treatment for alkali adjustment treatment, and the pH is adjusted to 13, and the alkali residue is returned to the garbage Landfill: send the landfill leachate after alkali adjustment to the ammonia nitrogen molecular sieve separator, after removing suspended impurities and colloidal organic substances in the landfill leachate, separate the ammonia nitrogen molecular sieve and recover ammonia nitrogen by adding hydrochloric acid to form ammonium chloride; ammonia nitrogen The recovered landfill leachate enters the nano-bioreactor for biochemical treatment to remove organic matter, nitrogen, and phosphorus in the landfill leachate; the landfill leachate after biochemical treatment is subjected to multi-stage countercurrent adsorption with modified carbon, and then discharged up to the stan...

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Abstract

The invention relates to a method for processing landfill leachate. The method comprises the following steps: carrying out efficient dissolved air flotation after collecting landfill leachate; adding slaked lime to the landfill leachate after air flotation treatment to carry out alkali adjustment; carrying out ammonia-nitrogen molecular sieve separation on the landfill leachate after alkali adjustment, and adding an acid to form an ammonium salt to recover ammonia nitrogen; carrying out biochemical treatment on the landfill leachate after ammonia nitrogen recovery; removing an organic matter, nitrogen and phosphorus in the landfill leachate; discharging up to the standard after multi-stage reflux adsorption on the landfill leachate after biochemical treatment. The landfill leachate is processed by using the technique disclosed by the invention, toxic and harmful substances such as high-strength ammonia nitrogen, non-biodegradable organic pollutants, heavy metal and the like in the landfill leachate are thoroughly removed, recycling of ammonia nitrogen resources is achieved, and the landfill leachate is discharged up to the standard.

Description

technical field [0001] The invention relates to a treatment method for landfill leachate, which belongs to the field of waste treatment and is applied to the treatment of urban domestic waste leachate. Background technique [0002] Since entering the 21st century, my country's economy has developed rapidly, the scale of cities has continued to expand, and the process of urbanization has continued to accelerate. However, the amount of municipal solid waste generated has also increased dramatically. According to statistics, at present, the annual output of urban waste in my country has exceeded 140 million tons, and it is growing at a rate of 8% to 10% every year. The per capita daily waste production has exceeded 1.1kg. up to 20,000 tons. my country has become one of the most serious countries in the world where cities are surrounded by garbage. [0003] In 2012, 157 million tons of domestic waste were collected and transported in 654 cities across the country, and about 70...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 代晋国宋乾武吴琪
Owner 北京博力扬环保科技有限公司
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