High-efficiency garbage leach ate treatment process

A landfill leachate and treatment process technology, which is applied in the field of high-efficiency landfill leachate treatment process, can solve the problems of large area, complex management, high operating costs, etc., and achieve the effects of effective utilization, guaranteed water output, and reduced operating costs

Inactive Publication Date: 2017-08-29
CENT & SOUTHERN CHINA MUNICIPAL ENG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a high-efficiency landfill leachate treatment process. Compared with the "MBR+NF / RO" membrane combination process, this process improves the "MBR+NF / RO" process process is too long, there are many structures, Complex management, high energy consumption, and high operating costs; compared with anaerobic + aerobic biochemical combination process, this process improves the "anaerobic + aerobic biochemical combination process" which occupies a large area, complex management, and Effluent COD cr and the problem that ammonia nitrogen is not easy to reach the standard

Method used

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  • High-efficiency garbage leach ate treatment process

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Effect test

Embodiment 1

[0027] This embodiment provides a high-efficiency landfill leachate treatment process and a device used in the process.

[0028] The devices used in the above process include: a mixing adjustment tank 1, a dosing tank 2, an inclined tube sedimentation tank 3, and a membrane distillation reaction tank 4 connected in sequence.

[0029] The internal space of the mixing regulating tank 1 is connected with an ozone generator 5, the water outlet of the mixing regulating tank 1 is connected with the lifting pump 6 through a water pipe, and the lifting pump 6 is connected with the water inlet of the dosing tank 2 through a water pipe.

[0030] The dosing pool 2 includes a PAC dosing area 21, a magnetic powder dosing area 22, and a PAM dosing area 23 that are sequentially connected.

[0031] An inclined tube group 31 is provided above the inside of the inclined tube sedimentation tank 3, and the inclined tube group includes a plurality of inclined tubes with a length of 1-1.2m and an inclinatio...

Embodiment 2

[0042] This embodiment provides a high-efficiency landfill leachate treatment process. The equipment used is the same as that of the first embodiment. The specific processing steps are basically the same as those of the first embodiment. The difference lies in:

[0043] The above-mentioned garbage leachate from the Hubei landfill was treated. During the test operation, the water temperature (T) of the distillation membrane reaction tank was 45-55℃, the cooling system temperature T was maintained at 10-15℃, and the pH was 6.5-7.5. The device runs continuously, the initial membrane flux is 15.0-20.0L / m 2 h. Ozone adjustment pool O 3 Concentration 0.4mg / L; PAC dosage is 25.0mg / L, PAM dosage is 0.8mg / L, F 3 O 4 The dosage is 5mg / L.

[0044] The test effluent result is: effluent COD cr The concentration is 80.0mg / L, BOD 5 The concentration is 16.0mg / L, NH 3 -N concentration is 20.0mg / L, SS concentration is 11.0mg / L. The treatment effect is basically the same as the first embodiment.

Embodiment 3

[0046] This embodiment provides a high-efficiency landfill leachate treatment process. The equipment used is the same as that of the first embodiment. The specific processing steps are basically the same as those of the first embodiment. The difference lies in:

[0047] The above-mentioned garbage leachate from the Hubei landfill was treated. During the test operation, the water temperature (T) of the distillation membrane reaction tank was 48-58℃, the cooling system temperature T was maintained at 12-17℃, and the pH was 6.0-7.0. The device runs continuously, the initial membrane flux is 15.0-20.0L / m 2 h. Ozone adjustment pool O 3 Concentration 0.8mg / L; PAC dosage is 30.0mg / L, PAM dosage is 1.2mg / L, F 3 O 4 The dosage is 3mg / L.

[0048] The test effluent result is: effluent COD cr The concentration is 83.0mg / L, BOD 5 The concentration is 15.0mg / L, NH 3 -N concentration is 23.0mg / L, SS concentration is 12.0mg / L. The treatment effect is basically the same as the first embodiment.

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Abstract

The invention discloses a high-efficiency garbage leachate processing technology. The method comprises the following steps: S1) a garbage leachate is introduced into an ozone-introduced mixed equalizing tank (1) for oxygenolysis; S2) adding PAC, magnetic powder and PAM in order into the leachate after oxygenolysis, introducing the leachate into an inclined tube sedimentation basin (3) after addition for deposition, performing backflow on the precipitation dirt to the mixed equalizing tank (1) for oxygenolysis, introducing a supernate into a membrane distillation separate tank (4); S3) performing a membrane distillation reaction on the supernate in the membrane distillation separate tank (4), wherein the liquid passing through the distillation membrane is purified effluent, performing backflow on the concentrated leachate which does not pass through the distillation membrane to the mixed equalizing tank (1) for oxygenolysis; and S4) cooling a part of the effluent and performing backflow on the effluent into the membrane distillation separate tank (4), wherein, the other part of the effluent is the final effluent. Through an ozone oxidation, magnetic coagulation and membrane distillation scheme, the process is simple, management is convenient, and the water outlet effect can be effectively guaranteed.

Description

Technical field [0001] The invention relates to the field of garbage treatment, in particular to an efficient garbage leachate treatment process. Background technique [0002] The composition of landfill leachate is complex, the concentration of pollutants is high, and the toxicity is high, which can be stored in the environment for a long time. After the untreated landfill leachate is discharged, it will not only pollute surface water and soil, but even pollute drinking water sources, groundwater, crops, aquatic animals, etc. It is bioaccumulative, teratogenic, carcinogenic, and genetically mutagenic, and it is in the food chain. Human health at the top poses a serious threat. At present, the domestic treatment methods for landfill leachate mainly include biological treatment, physical and chemical treatment and land treatment methods. Among them, the "MBR+NF / RO" membrane combined process and the anaerobic + aerobic combined biochemical process are generally mainstream processe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/06
CPCC02F9/00C02F1/14C02F1/447C02F1/488C02F1/50C02F1/5245C02F1/56C02F1/78C02F2103/06C02F2209/02C02F2209/06C02F2209/08C02F2209/14C02F2301/046
Inventor 靳斌斌刘友荣陈燕波郑莉
Owner CENT & SOUTHERN CHINA MUNICIPAL ENG DESIGN & RES INST
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