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Leachate treatment agent and leachate treatment method

A treatment method and leachate technology, which is applied in the direction of contaminated groundwater/leachate treatment, water/sewage treatment, chemical instruments and methods, etc., to achieve improved removal rate, large specific surface area, and good effect

Active Publication Date: 2019-04-16
湘潭城乡创新园林工程股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems existing in the prior art, the present invention adopts the Fenton method to pretreat the landfill leachate, and then conducts advanced treatment through the leachate treatment agent, which is fast, economical and efficient. Among them, activated carbon is used as the carrier to load magnesium oxide and iron compounds as The treatment agent can improve the removal rate of COD, ammonia nitrogen, total phosphorus, suspended solids and heavy metals in the leachate, and will not cause secondary pollution. At the same time, the treatment agent of the present invention is magnetic and easy to recycle

Method used

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  • Leachate treatment agent and leachate treatment method
  • Leachate treatment agent and leachate treatment method

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Embodiment 1

[0037] The leachate treatment method comprises the following steps:

[0038] (1) Fenton method pretreatment: use sulfuric acid solution to adjust the pH of landfill leachate to 3, add ferrous sulfate and hydrogen peroxide, after stirring for 0.5h, let stand for 1h to obtain landfill leachate after pretreatment;

[0039] (2) Advanced treatment: use sulfuric acid solution to adjust the pH of the landfill leachate pretreated in step (1) to 2, add the treatment agent and stir for 0.5 h to complete the treatment.

[0040] Wherein, the mol ratio of hydrogen peroxide and ferrous sulfate described in step (1) is 5:1.

[0041] Further, the treatment agent described in step (2), its preparation step comprises:

[0042] S1: Dissolving magnesium nitrate in water, stirring evenly at a stirring rate of 400r / min, to obtain a magnesium nitrate solution with a mass fraction of 30%;

[0043] S2: dissolving ferric chloride in water, stirring evenly at a stirring rate of 400r / min, to obtain a f...

Embodiment 2

[0047] The difference between embodiment 2 and embodiment 1 is that in the treatment agent preparation step, the mass fraction of the magnesium nitrate solution is 20%.

Embodiment 3

[0049] The difference between embodiment 3 and embodiment 1 is that in the step of preparing the treatment agent, the mass fraction of the magnesium nitrate solution is 35%.

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Abstract

The invention provides a leachate treatment agent and a leachate treatment method. A Fenton method is adopted for pretreating a garbage leachate, activated carbon is used as a carrier for loading magnesium oxide and an iron compound and used as the treatment agent for deeply treating the leachate, the removal rate of COD, ammonia nitrogen, total phosphorus, solid suspended solid, heavy metal and other substances in the leachate can be increased, the method is quick, economic and efficient, the problems such as secondary pollution cannot be caused, and the treatment agent has magnetism and is convenient to recycle.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a leachate treatment agent and a leachate treatment method. Background technique [0002] Landfill leachate is the sewage leached out due to fermentation, rain washing, surface water and groundwater immersion during the process of garbage dumping and landfilling, and usually includes a variety of toxic and harmful inorganic and organic substances. The water quality is complex and varied, the COD and BOD5 concentrations, heavy metal content and ammonia nitrogen content are high, and the imbalance of microbial nutrient elements is the main feature of landfill leachate. Its pH is usually between 4-9, and the COD content is in the range of 2000-62000mg / L Within the range, the BOD5 content is in the range of 60-45000mg / L, and the concentration of heavy metals is basically the same as that in municipal sewage. [0003] The treatment methods of landfill leachate usually include ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/72C02F101/16C02F101/10C02F101/22C02F103/06
CPCC02F1/281C02F1/722C02F1/725C02F2101/105C02F2101/16C02F2101/22C02F2103/06
Inventor 陈海龙欧鹏彭拓夫张婷周涓涓
Owner 湘潭城乡创新园林工程股份有限公司
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