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Treatment system and method of landfill leachate

A landfill leachate and treatment system technology, applied in the direction of contaminated groundwater/leachate treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of large fluctuations in treatment volume, secondary pollution, frequent replacement, etc. , achieve the effect of low investment and operation cost, reducing COD and ammonia nitrogen

Inactive Publication Date: 2017-11-21
格丰科技材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the maintenance and replacement of membrane modules are frequent, difficult to clean, easy to clog, large fluctuations in processing capacity, and high operating costs. At the same time, the concentrated water generated by membrane treatment is difficult to treat and easily produces secondary pollution.

Method used

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  • Treatment system and method of landfill leachate

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Effect test

Embodiment 1

[0052] Pilot test of landfill leachate in Pingxiang, Jiangxi, raw water COD cr It is about 4000mg / L, the flocculant PAC is 150mg / L, PAM is 2mg / L, and the surface load of the primary reaction sedimentation tank is 0.5m 3 / m 2 h, the hydraulic retention time is 4h, and then it is introduced into a first-level advanced oxidation tower (ozone catalytic oxidation tower), and the ozone dosage is 75mg / m 3 , the hydraulic retention time is 1h, and then it is introduced into the secondary reaction sedimentation tank, and the surface load of the secondary reaction sedimentation tank is 0.5m 3 / m 2 h, the hydraulic retention time is 6h, and then pumped into the pre-acidification tank, the pre-acidification time is 4h, the pH value of the wastewater is adjusted to about 7, and then pumped into the anaerobic reactor. The anaerobic reactor used in this embodiment is UASB (upstream type multi-stage anaerobic reactor), the volume load of anaerobic reactor is 8kgCOD / m 3 d, the ascending fl...

Embodiment 2

[0054] A pilot test study was carried out on the landfill leachate in Pingxiang, Jiangxi. The raw water CODcr is about 7000mg / L, the flocculant PAC is 350mg / L, and the PAM is 5mg / L. The surface load of the primary reaction sedimentation tank is 1m 3 / m 2 h, the hydraulic retention time is 4h, and then introduced into the first-level advanced oxidation tower, the ozone dosage is 150mg / m 3 , the hydraulic retention time is 1h, and then it is introduced into the secondary reaction sedimentation tank, and the surface load of the secondary reaction sedimentation tank is 1m 3 / m 2 h, the hydraulic retention time is 6h, and then pumped into the pre-acidification tank, the pre-acidification time is 4h, and the pH value of the wastewater is adjusted to about 7 and pumped into the anaerobic reactor. The anaerobic reactor adopted in this embodiment is UASB (upflow type) Multi-stage anaerobic reactor), anaerobic reactor volume load 15kgCOD / m 3 d, the ascending flow rate is 6m / h, the hy...

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Abstract

The invention discloses a treatment system and method of landfill leachate. The system comprises a pretreatment device used for removing impurities, wherein the pretreatment device comprises a first-order reaction settling pond, a first-order catalytic oxidation tower and a second-order reaction settling pond that are sequentially connected with one another. The system also comprises a biochemical treatment device, a second-order catalytic oxidation tower, a heavy metal removal tower and a clear water pond that are sequentially connected with one another, wherein the second-order reaction settling pond is connected with the biochemical treatment device. According to the system and the method, biological and biochemical technologies are adopted in a biological treatment part, and an ozone catalytic oxidation technology and a heavy metal adsorption technology are adopted in a deep oxidation treatment part, so that the COD, ammonia nitrogen and heavy metals are reduced; concentrated solution and secondary pollution are not produced after deep treatment.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a treatment system and method for landfill leachate. Background technique [0002] The commonly used treatment methods for landfill leachate are: biological method, chemical oxidation method, flocculation sedimentation method, recharge method, artificial wetland method, etc. Compared with the early landfill leachate, middle-aged landfill leachate has the following characteristics: (1) The amount of leachate produced is significantly affected by climate and seasonal changes, especially in the rainy season; (2) The composition is complex, and the organic matter that is difficult to biodegrade accounts for more than 70% of the total organic components in the leachate; (3) Poor biodegradability, BOD 5 / COD cr The value is generally less than 0.15; (4) The high concentration of ammonia nitrogen has a toxic effect on microorganisms, resulting in an imbala...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/06
CPCC02F1/28C02F1/5236C02F1/56C02F1/725C02F1/78C02F3/1268C02F3/2846C02F3/30C02F9/00C02F2103/06C02F2301/08
Inventor 宁小飞邱根萍奉向东曾欠鹏
Owner 格丰科技材料有限公司
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