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Method for deeply treating landfill leachate

A landfill leachate and advanced treatment technology, applied in the field of environmental engineering, can solve the problems of high power energy, fouling of concentrated water reuse equipment, long residence time, etc.

Active Publication Date: 2019-06-14
JIANGXI GAIA ENVIRONMENTAL SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional biological treatment method, there are problems that the foam in the aerobic stage is difficult to control and the organic matter is difficult to degrade, so that the residence time of the entire aerobic stage is long. The water reuse rate can only reach 60%), serious fouling of concentrated water reuse equipment, high power energy and high operation and maintenance costs restrict its application

Method used

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  • Method for deeply treating landfill leachate
  • Method for deeply treating landfill leachate
  • Method for deeply treating landfill leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] GY-3 type packing matrix, the preparation process is as follows:

[0052] 1) Select the landfill that has been buried in the landfill for 5 to 40 years, and after removing stones, broken glass, incompletely degraded rubber and plastic, wooden sticks, paper and other debris with particles larger than 10mm, the moisture content is 20 to 36%. mineralized waste; the abundances of Pseudomonas, Sphingomonas, Comamonadaceae and Hyphomicrobiaceae in the mineralized waste were as high as 12.73%, 12.29%, and 8.82% respectively. % and 6.40%.

[0053] 2) Choose an ellipsoid, with a particle size of 6-13mm and a bulk density of 0.9-1.5g / cm 3 , ceramsite with a porosity of 0.3-0.7;

[0054]3) Mix the mineralized waste and ceramsite at a mass ratio of 1: (3~7), soak and stir in the nitrifying bacteria culture medium for 150 seconds, and mix well; every two days, replace with fresh nitrifying bacteria culture medium and mix well After culturing for 10 days, the primary packing matri...

Embodiment 2

[0059] The primary filler matrix preparation process is as follows:

[0060] 1) Select the landfill that has been buried for 5 to 40 years, and after removing stones, broken glass, incompletely degraded rubber and plastic, wooden sticks, paper and other debris with particles larger than 10mm, the moisture content is 20 to 36%. mineralized waste; the abundances of Pseudomonas, Sphingomonas, Comamonadaceae and Hyphomicrobiaceae in the mineralized waste were as high as 12.73%, 12.29%, and 8.82% respectively. % and 6.40%.

[0061] 2) Choose an ellipsoid, with a particle size of 6-13mm and a bulk density of 0.9-1.5g / cm 3 , ceramsite with a porosity of 0.3-0.7;

[0062] 3) Mix the mineralized waste and ceramsite at a mass ratio of 1: (3~7), soak and stir in the nitrifying bacteria culture medium for 150 seconds, and mix well; every two days, replace with fresh nitrifying bacteria culture medium and mix well After culturing for 10 days, the primary packing matrix is ​​completed; t...

Embodiment 3

[0065] A co-position nitrification and denitrification filter bed, the co-position nitrification and denitrification filter bed, from top to bottom, sequentially comprises a water distribution pipe, a packing matrix layer composed of the packing matrix described in Example 1, a supporting layer and a drainage pipe, It also includes a ventilation pipe arranged indirectly distributed inside the filter bed; the drainage pipe is arranged between the supporting layers; the drainage pipe is provided with a collection hole; the upper end of the ventilation pipe is higher than the same-position nitrification and denitrification filter bed surface, the lower end passes through the packing matrix layer and extends to the supporting layer, the distance between two ventilation pipes is 1m; the water distribution pipes are evenly distributed on the surface of the in-situ nitrification and denitrification filter bed, and are distributed in parallel, with an inner diameter of 20mm, and two wat...

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Abstract

The invention provides a method for deeply treating landfill leachate. The method comprises the following steps: 1) after pretreating the landfill leachate, adopting an A / O process for treating; 2) after carrying out MBR film treatment and ultrafiltration treatmenton the landfill leachate treated in the step 1), allowing the landfill leachate to enter a same-position nitrification denitrificationfilter bed provided with a GY-3 type filler matrix for treatment; and 3) allowing the landfill leachate treated by the step 2) to enter a reverse osmosis system for treatment, and discharging treatedconcentrated water into a landfill or returning the treated concentrated water to the step 1); wherein the purified water is discharged up to the standard; and the GY-3 type filler matrix contains Pseudoxanthomonas, sphingomonas, Comamonadaceae and Hyphomicrobiaceae microorganisms. According to the treatment method provided by the invention, organic matters in the landfill leachate are degraded byapplying the GY-3 type filler matrix, and the purification and emission of the landfill leachate are realized; the treatment is efficient and rapid to start, the time is short, the treatment effect is stable, and the operation and running are simple and convenient.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a method for advanced treatment of landfill leachate. Background technique [0002] At present, the methods of garbage disposal in my country mainly include sanitary landfill, incineration and composting. Among them, sanitary landfill is the main method, but sanitary landfill will produce secondary pollution - landfill leachate. Landfill leachate has a high concentration, complex composition, and a large amount of "carcinogenic, teratogenic, mutagenic" compounds and heavy metals. If not properly treated, it will pollute groundwater and surface drinking water sources, and cause great harm to the environment and human body. Therefore, the development of landfill leachate treatment technology is of great importance to prevent secondary pollution in the process of solid waste treatment in my country, reduce pollutant discharge, achieve coordinated development of ec...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/06
Inventor 柴喜林唐崇俭柴立元刘治功
Owner JIANGXI GAIA ENVIRONMENTAL SCI & TECH CO LTD
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