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A treatment method for landfill leachate

A landfill leachate and treatment method technology, which is applied in the field of landfill leachate treatment, can solve the problems of complex and unreachable landfill leachate components, and achieve the effect of reducing heavy metal ions and other pollutants

Active Publication Date: 2021-09-17
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the leachate of the existing landfill has complex components, and the CANON process is not stable in the treatment of the leachate with high ammonia and nitrogen, so the treatment effect often fails to meet the design requirements. To provide a method for stabilizing the landfill leachate with complex and variable components, and discharging the leachate up to the standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A treatment method for landfill leachate, said treatment method comprising the following steps:

[0027] Step 1: Make the mixture of cinder, fly ash and modified chitin into landfill leachate treatment material, and pour it into the landfill leachate neutralization tank together with lime; coal cinder, fly ash and modified chitin The mass ratio is 3:2:1; the mass ratio of landfill leachate treatment material to lime is 3:1; the modified chitin is prepared by the following process: add 20 parts of chitin with a deacetylation degree of 35% to 100 Soak in 2.5 mol / L sodium hydroxide solution for 1 day, filter, wash, add hydrogen peroxide to bleach, filter, wash, dry, add 1 part of epibromohydrin, 0.05 part of maleic anhydride, 0.5 part of trimethylamine aqueous solution, 0.001 part of azobisisobutyronitrile and 0.01 part of tetrabutylammonium bromide were stirred under pressure, the stirring speed was 400r / min, the stirring temperature was 150°C, the stirring time was 15min...

Embodiment 2

[0033] A treatment method for landfill leachate, said treatment method comprising the following steps:

[0034] Step 1: Make the mixture of cinder, fly ash and modified chitin into landfill leachate treatment material, and pour it into the landfill leachate neutralization tank together with lime; coal cinder, fly ash and modified chitin The mass ratio of the landfill leachate treatment material to lime is 4:3:1; the mass ratio of landfill leachate treatment material to lime is 3:1; the modified chitin is prepared by the following process: 23 parts of chitin with a deacetylation degree of 38% are added to 125 Soak in 2.8 mol / L sodium hydroxide solution for 2 days, filter, wash, add hydrogen peroxide to bleach, filter, wash, dry, add 2 parts of epibromohydrin, 0.6 parts of maleic anhydride, 0.8 parts of trimethylamine aqueous solution, 0.002 parts of azobisisobutyronitrile and 0.04 parts of tetrabutylammonium bromide were stirred under pressure, the stirring speed was 500r / min, ...

Embodiment 3

[0040] A treatment method for landfill leachate, said treatment method comprising the following steps:

[0041] Step 1: Make the mixture of cinder, fly ash and modified chitin into landfill leachate treatment material, and pour it into the landfill leachate neutralization tank together with lime; coal cinder, fly ash and modified chitin The mass ratio of the landfill leachate treatment material to lime is 5:3:1; the mass ratio of landfill leachate treatment material to lime is 3:1; the modified chitin is prepared by the following process: 35 parts of chitin with a deacetylation degree of 45% are added to 140 Soak in 3.5 mol / L sodium hydroxide solution for 3 days, filter, wash, add hydrogen peroxide to bleach, filter, wash, dry, add 3 parts of epibromohydrin, 0.09 parts of maleic anhydride, 0.9 parts of trimethylamine aqueous solution, 0.003 parts of azobisisobutyronitrile and 0.05 parts of tetrabutylammonium bromide were stirred under pressure, the stirring speed was 700r / min,...

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Abstract

The invention relates to a method for treating landfill leachate, which uses an inorganic flocculant and an organic flocculant. The inorganic flocculant is a composite inorganic flocculant mainly composed of activated clay, and is a flocculant for water treatment that can reduce ammonia nitrogen in water. Denitrification can also cause suspended solids to settle; the organic flocculant is a composite organic flocculant mainly composed of polyacrylamide, anionic polyacrylamide combines with heavy metal ions to form insoluble precipitates, and chitosan in the formula is an anionic Polymer flocculant has the function of electricity neutralization, adsorption bridging and metal chelation. Chitosan is compounded with activated carbon, anionic chitosan and porous activated carbon form a chemical bridge, neutralize and reduce the charge on the surface of the colloid, and help the destabilization of the colloid; this formula has the ability to reduce heavy metal ions and other pollutants in water function. The invention can stably treat the landfill leachate with complicated and variable components and discharge it up to the standard.

Description

technical field [0001] The invention relates to a garbage treatment method, in particular to a garbage leachate treatment method. Background technique [0002] Landfill leachate refers to the moisture contained in the garbage itself in the landfill, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the covering soil, and passing through the garbage layer and the covering soil. A high concentration wastewater. Landfill leachate has characteristics different from ordinary urban sewage: the concentration of pollutants is extremely high, and the COD and ammonia nitrogen concentrations of some landfill leachate can be as high as nearly 100,000 and nearly 10,000 mg / L, respectively. There are three most prominent features of the leachate: one is the high concentration of ammonia nitrogen, which has an inhibitory effect on the reproduction and growth of microorganisms; the other is the low concentrati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/16C02F101/20C02F103/06
CPCC02F1/20C02F1/5236C02F1/5245C02F1/5263C02F1/54C02F1/56C02F1/66C02F3/1263C02F3/28C02F9/00C02F2001/007C02F2101/16C02F2101/20C02F2103/06C02F2301/08
Inventor 孙静亚麻跃阳广凤张富生
Owner ZHEJIANG OCEAN UNIV
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