A Fenton reaction catalyst, preparation method, and Fenton reactor based on the catalyst and a full-scale treatment method for landfill leachate

A Fenton reaction and catalyst technology, applied in the field of Fenton reaction catalyst, preparation, Fenton reactor and landfill leachate full quantitative treatment, can solve secondary pollution, mineralization, difficult organic molecules and other problems, and achieve relief Packing plugging, prolonging the effect of backwashing time

Active Publication Date: 2020-12-11
湖南天为环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, almost all previous reports on catalytically promoted AOPs have focused on the use of organic matter as cocatalysts, and organic cocatalysts are easy to cause secondary pollution and it is difficult to completely mineralize organic molecules.
[0005] The Fenton method is a very important part of the common full-quantitative treatment technology for leachate at present, but the traditional Fenton has problems such as low efficiency and high iron sludge output.
In addition, the water volume of leachate varies greatly with the seasons, and the traditional Fenton method is difficult to meet the needs of leachate treatment

Method used

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  • A Fenton reaction catalyst, preparation method, and Fenton reactor based on the catalyst and a full-scale treatment method for landfill leachate
  • A Fenton reaction catalyst, preparation method, and Fenton reactor based on the catalyst and a full-scale treatment method for landfill leachate
  • A Fenton reaction catalyst, preparation method, and Fenton reactor based on the catalyst and a full-scale treatment method for landfill leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A preparation method of Fenton reaction catalyst of the present invention, comprises the following steps:

[0076]Put the raw ore freshly produced in the mine, galena, sphalerite and cobalt ore into the crusher to crush, grind, add a large amount of hydrogen sulfuric acid to carry out hydrogen sulfuric acid modified flotation, after flotation, use absolute ethanol to Wash with pure water three times, and dry at 60°C for 24 hours. After drying, pass through 5-mesh, 18-mesh, 50-mesh and 140-mesh sieves successively to obtain mineral particles with particle sizes of 1mm~4mm, 0.30mm~1mm and 0.10mm~0.30mm. Three different mineral particles with the same particle size were screened according to the mass ratio ZnS:PbS:Co 3 S 4 =3:1:0.5 mix evenly. Three mixed catalysts with different particle sizes were obtained.

Embodiment 2

[0078] An application of the Fenton reaction catalyst obtained by the preparation method described in Example 1 of the present invention in strengthening the Fenton method for treating landfill leachate.

[0079] The Fenton reaction catalysts are PbS, ZnS and Co with particle sizes ranging from 0.1 to 0.3mm, 0.3 to 1mm and 1mm to 4mm 3 S 4 ore particles;

[0080] According to the particle size, the Fenton reaction catalyst is mixed with ore particles of the same particle size and wrapped into a plurality of ore units with a filter bag of suitable pore size, and layered and fixed in the Fenton reactor;

[0081] The layers are fixed in such a way that the particle size increases from small to large from top to bottom; the Fenton reaction catalyst is fixed on the central fixed column of the reactor in the shape of a disc.

[0082] The effective volume of the Fenton reactor is 8m 3 , the reaction reagent of the Fenton method is FeSO 4 ·7H 2 O and H 2 o 2 ; The FeSO 4 ·7H ...

experiment example 1

[0086] The Fenton reaction catalyst described in Example 1 and Example 2 of the present invention was used to degrade the effluent from the biochemical section of leachate treatment in a landfill. The initial parameters of leachate are shown in Table 1 below:

[0087] Table 1 The effluent of the biochemical section of leachate treatment in a landfill site

[0088] parameter COD Ammonia nitrogen suspended matter pH unit mg / L mg / L mg / L / value 2043 12 120 3.5

[0089] In the experiment, the leachate and Fenton's reagent (the reaction reagent of the Fenton's method of reference example 2) were mixed in the Fenton dosing tank for 30 seconds, and then the mixed solution was pumped into the Fenton reactor from the bottom water inlet, and the mixed solution Slowly upward contact with the mineral particle filler, and the mineral particles help catalyze the Fenton reaction to quickly degrade COD in the leachate.

[0090] The experimental res...

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Abstract

The invention relates to a Fenton reaction catalyst, a preparation method and a Fenton reactor based on the catalyst and a method for fully quantifying landfill leachate, belonging to the field of sewage treatment. The catalytically active components of the Fenton reaction catalyst include: ZnS, PbS, Co 3 S 4 . The invention also provides a Fenton reactor based on the Fenton reaction catalyst and a method for fully quantifying landfill leachate. The Fenton reaction catalyst, the Fenton reactor and the method for fully quantifying landfill leachate treatment of the present invention can efficiently reduce the COD value in the landfill leachate.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a Fenton reaction catalyst, a preparation method, a Fenton reactor based on the catalyst, and a method for fully quantifying landfill leachate treatment. Background technique [0002] Quantitative treatment technology of landfill leachate is a trend of leachate treatment in the future, which can effectively solve a series of problems caused by the recharge of membrane concentrate after treatment by "biochemical + membrane technology" and "full membrane technology" in common technologies for a long time. Compared with the existing "evaporation + solidification" process, "biochemical + Fenton" has lower operating costs. [0003] Advanced Oxidation Processes (AOPs) mainly include Fenton method and Fenton-like method. Fenton method is an advanced oxidation technology commonly used in leachate biochemical treatment units, which can effectively remove organic pollutants in l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/049B01J27/053B01J8/04C02F1/72C02F103/06
CPCB01J8/0453B01J27/049B01J27/053C02F1/722C02F1/725C02F2103/06C02F2209/08C02F2305/026
Inventor 周甜曹兴黄敏全邦宇罗雅婧陈金煊蔡昕彤朱晋荣周伊丹黄明辉郭莉
Owner 湖南天为环保科技有限公司
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