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Landfill leachate treatment system

A landfill leachate and treatment system technology, which is applied in the field of landfill leachate treatment systems, can solve the problems of high cost and difficulty in large-scale utilization, and achieve the effects of reducing treatment costs, preventing poisonous effects, and improving effects

Inactive Publication Date: 2020-07-17
徐丹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Humic matter is the main substance of COD in old landfill leachate. Most of the existing technologies remove it through advanced oxidative degradation and biochemical methods, or filter it out and recycle it by membrane filtration, but the cost of both is very high , it is difficult to use large-scale

Method used

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  • Landfill leachate treatment system
  • Landfill leachate treatment system
  • Landfill leachate treatment system

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Leachate treatment of a landfill in a certain place:

[0039]1. First, the landfill leachate is transported to the pretreatment device 1 for treatment, and the modified sludge charcoal and aluminum salt are added to the coagulation unit for treatment. The dosage of sludge charcoal is 1-3g / L, aluminum Salt (as Al 3+ The dosage of 2.5-4g / L is 2.5-4g / L, after the coagulation treatment, it is filtered through the filter unit, and the filter unit is a filter wall filled with sludge charcoal;

[0040] 2. Negative pressure-blowing treatment

[0041] The negative pressure-blow-off device 2 is provided with a ventilation pipe and a vacuum pump, the ventilation pipe supplies the blow-off gas, and the vacuum pump draws negative pressure, and the blow-off gas and the suction negative pressure are alternately treated to remove the malodorous gas in the wastewater. The stripping gas can be alternately blown off by air, water vapor, and flue gas. The stripping time and the negative ...

Embodiment 2

[0052] On the basis of Example 1, the sludge charcoal is modified, the modification is to soak the sludge charcoal in alkaline water for 12h, and clean it with distilled water, and soak it in the ferric chloride solution after cleaning and air-drying , the alkaline water is NaOH solution, and the molar concentration is 5mol / L; the molar concentration of ferric chloride solution is 1mol / L, and the modified sludge charcoal is mixed with domesticated sludge and added to the adsorption pool, and the modified sewage The dry weight ratio of peat and domesticated sludge is 1:4.

[0053] Table 2 Leachate Water Quality (mg / L)

[0054] index COD cr

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PUM

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Abstract

The invention discloses a landfill leachate treatment system comprising a pretreatment device, a negative pressure-air stripping device, a filtration-adsorption device, an absorption device, a membrane filtration device, a multi-stage biochemical device, a domestication culture tank, a sludge dewatering device and an incinerator; the filtration-adsorption device is specially designed for the waterquality of leachate; domesticated sludge and sludge carbon are added into the adsorption tank to adsorb humus substances in the leachate, the adsorbed sludge is dewatered and then carbonized, and thecarbide is used for treating the landfill leachate, so that the treatment cost is reduced, and the treatment efficiency is improved.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a landfill leachate treatment system. Background technique [0002] Most of the organic matter in landfill leachate is soluble organic matter, and the COD contributed by suspended matter is relatively low. Due to the difference in waste components and degradation degrees, the concentration of organic compounds in leachate varies greatly, but they can be divided into three categories 1. Small molecular acids and organic acids; 2. Medium molecular weight ash sulfonic acids; 3. High molecular humus; due to the complex components of leachate and various pollutants, COD, BOD and B are usually used in the treatment process. / C to characterize. [0003] With the increase of landfill time, the concentration of BOD and COD first increased and then gradually decreased, and the BOD of leachate gradually reached the peak within half a year to two and a half years, and then, the BO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/06C02F101/30C02F101/20C02F101/16
CPCC02F9/00C02F1/5281C02F1/001C02F1/20C02F1/28C02F1/283C02F1/444C02F1/442C02F1/441C02F3/34C02F3/30C02F11/121C02F11/10C02F2301/08C02F2303/02C02F2203/004C02F2103/06C02F2101/30C02F2101/20C02F2101/16C02F2301/063C02F2209/08C02F2209/14C02F2209/20C02F2209/10
Inventor 苏华汤亚勇樊晓瑜
Owner 徐丹
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