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Landfill leachate evaporation condensate water deep purification treatment method and system based on membrane technology

A landfill leachate, evaporative condensation technology, applied in polluted groundwater/leachate treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of poor process stability, complex process flow, high production cost, etc. Achieve the effect of low production cost, simple process flow and good process stability

Pending Publication Date: 2020-05-08
大连广泰源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to propose a method for deep purification of landfill leachate evaporation condensate water based on membrane technology in view of the complex process flow, high production cost and poor process stability of the current deep purification treatment method. Advantages of low production cost and good process stability

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  • Landfill leachate evaporation condensate water deep purification treatment method and system based on membrane technology
  • Landfill leachate evaporation condensate water deep purification treatment method and system based on membrane technology

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Embodiment 1

[0028] This embodiment discloses a membrane technology-based landfill leachate evaporation condensate deep purification treatment system, and its structure is as follows figure 1 As shown, it includes a primary storage tank 1, a primary membrane system 3, a secondary storage tank 4, and a secondary membrane system 6. The bottom outlet of the primary storage tank 1 passes through a primary high-pressure pump 2 and a primary membrane system 3. The inlet is connected, the primary permeate outlet of the primary membrane system 3 is communicated with the secondary storage tank 4, and the bottom outlet of the secondary storage tank 4 is communicated with the inlet of the secondary membrane system 6 through the secondary high pressure pump 5, The secondary concentrated liquid outlet of the secondary membrane system 6 is in communication with the primary storage tank 1, and the secondary permeate outlet of the secondary membrane system 6 is in communication with downstream equipment. T...

Embodiment 2

[0032] This embodiment discloses a method for deep purification treatment of landfill leachate evaporation condensate based on membrane technology. The system described in embodiment 1 is adopted and includes the following steps:

[0033] The method is used to process the MVR evaporation condensate in a landfill site. The COD of the evaporation condensate is 73.74mg / L, the ammonia nitrogen is 27.12mg / L, the pH is adjusted to 8.37 by adding sodium hydroxide, and the first membrane is filtered. The COD of the primary permeate is 6.23mg / L, the ammonia nitrogen is 11.76mg / L, the COD removal rate is 91.55%, and the ammonia nitrogen removal rate is 56.64%. The primary permeate is adjusted to pH 5.7 by adding appropriate amount of sulfuric acid. After filtration, the final COD was 0mg / L, the ammonia nitrogen was 0.51mg / L, the COD removal rate was 100%, the ammonia nitrogen removal rate was 98.12%, and the final recovery rate of evaporated condensate was 97%.

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Abstract

The invention provides a landfill leachate evaporation condensate water deep purification treatment method and system based on a membrane technology. The landfill leachate evaporation condensate waterdeep purification treatment method based on the membrane technology comprises the following steps: the pH value of landfill leachate evaporation condensate water is adjusted to be alkaline, then thelandfill leachate evaporation condensate water is filtered through a first-stage membrane filtration system, organic matter in the water is removed, and first-stage permeate liquid and first-stage concentrated liquid are obtained; returning the first-stage concentrated solution to an evaporation section for re-evaporation treatment, adjusting the pH value of the first-stage permeate solution to beacidic, filtering through a second-stage membrane filtration system, and removing ammonia nitrogen in water to obtain a second-stage permeate solution and a second-stage concentrated solution; the second-stage permeate liquid is purified up-to-standard discharged water and can be directly discharged, and the second-stage concentrated liquid returns to the first-stage membrane filtration system tobe filtered again. The method provided by the invention has the advantages of simple process flow, low production cost and good process stability.

Description

Technical field [0001] The invention relates to a landfill leachate evaporation condensate treatment technology, in particular to a landfill leachate evaporation condensate deep purification treatment method and system based on membrane technology. Background technique [0002] Landfill leachate refers to the sewage formed by the leaching action of water produced by the decomposition of organic matter in the garbage, free water in the garbage, precipitation, and infiltration of groundwater during the landfill and stacking process. After the humidity exceeds its water holding capacity, the suspended or dissolved organic pollutants and inorganic pollutants such as heavy metals in the garbage dump will be dissolved out together, and leachate will be produced. [0003] With the gradual improvement of the economic level and people's quality of life, the country has paid more and more attention to environmental protection, and new sewage discharge standards have been continuously introdu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/16C02F101/30C02F101/32C02F103/06
CPCC02F9/00C02F2103/06C02F1/66C02F1/441C02F2101/30C02F2301/08C02F2101/16C02F2101/322C02F2209/08C02F2209/02Y02A20/131
Inventor 杨微孟灵建王璐邵岷
Owner 大连广泰源环保科技有限公司