Microwave catalytic oxidation apparatus for landfill leachate treatment

A microwave catalytic oxidation and equipment technology, applied in water/sewage multi-stage treatment, light water/sewage treatment, oxidized water/sewage treatment, etc. Short, discontinuous microwave heating and other problems, to achieve the effect of improving microwave utilization efficiency, prolonging service life, and uniform heating

Inactive Publication Date: 2014-06-25
GUANGDONG UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of discontinuous microwave heating, high start-up energy consumption, difficult effective combination of microwave and catalytic active sites, and short service life of magnetron in the existing microwave catalytic oxidation technology, the present invention provides a high microwave utilization efficiency, Microwave catalytic oxidation equipment for treating landfill leachate that has a long service life of a magnetron, good leachate treatment effect, and can be automatically controlled, and a method for using the equipment to treat landfill leachate

Method used

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  • Microwave catalytic oxidation apparatus for landfill leachate treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Microwave catalytic oxidation equipment see figure 1 , Mainly including mixing water tank, microwave reactor, water cooling device, circulation system, automatic control system. The upper part of the mixing water tank is provided with an overflow valve 2, a water inlet 6, and a dosing tank 7, and a water level gauge 5 and an aeration pipe 4 are provided in the mixing water tank. The microwave reactor is surrounded by a shell 19, in which an outer wire 11, a magnetron 16, a transformer 15, and a coil 18 are arranged, and the microwave reactor is connected to a cooling system 17. The circulation system is provided with a forward connection pipeline connecting the mixing water tank and the microwave reactor, on which a circulating water pump 8, a solenoid valve 9, and a flow meter 12 are provided. The connecting pipeline is connected to the lower end of the coil 18 of the microwave reactor; the circulation system is also provided There is a return connecting pipe connecting...

Embodiment 2

[0035] Using the microwave catalytic oxidation equipment of Example 1 to treat landfill leachate, the method is as follows:

[0036] (1) Fully mix and aerate the waste leachate to be processed and iron-carbon (30 mesh) at 100:1 (mass ratio), and adjust the pH to 5.0 to obtain a reaction mixture;

[0037] (2) The reaction mixture is pumped into the coil in the microwave reactor;

[0038] (3) Set the temperature of the microwave reactor to 80°C and the operating time to 30 minutes, and turn on the automatic operating system;

[0039] (4) Press the garbage leachate into the mixed water tank during operation: 30%H 2 O 2 (Volume ratio)=100: 3 minutes 5 times dosing H 2 O 2 Solution

[0040] (5) Adjust the pH value of the landfill leachate after microwave catalytic oxidation treatment to 9.0, and let it stand for 25 minutes.

[0041] (6) Take the supernatant to determine its COD Cr . COD Cr From 6720mg / L before treatment to 429mg / L after treatment, the removal rate was 93.6%.

Embodiment 3

[0043] Using the microwave catalytic oxidation equipment of Example 1 to treat landfill leachate, the method is as follows:

[0044] (1) Fully mix and aerate the waste leachate to be processed and iron-carbon (40 mesh) at 200:1 (mass ratio), and adjust the pH to 4.0 to obtain a reaction mixture;

[0045] (2) The reaction mixture is pumped into the coil in the microwave reactor;

[0046] (3) Set the temperature of the microwave reactor to 70°C and the running time to 15 minutes, and turn on the automatic running system;

[0047] (4) Press the garbage leachate into the mixed water tank during operation: 30%H 2 O 2 (Volume ratio)=100: 1 minute 4 times dosing H 2 O 2 Solution

[0048] (5) Adjust the pH value of the landfill leachate after microwave catalytic oxidation treatment to 8.0, and let it stand for 15 minutes.

[0049] (6) Take the supernatant to determine its COD Cr . COD Cr From 19260mg / L to 958mg / L, the removal rate was 95.1%.

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Abstract

The invention discloses a microwave catalytic oxidation apparatus for landfill leachate treatment. The microwave catalytic oxidation apparatus mainly comprises a mixed water tank, a microwave reactor, a water cooling device, a circulating system and an automatic control system, wherein an overflow valve, a water inlet and a dosing tank are arranged on the upper part of the mixed water tank, and a water level indicator and an aeration pipe are arranged in the mixed water tank; the microwave reactor is surrounded by a housing, an outer wire, a magnetron, a transformer and a coil pipe are arranged in the microwave reactor, and the microwave reactor is connected with a cooling system; the circulating system is provided with a forward connecting pipe and a backward connecting pipe, the two of which are connected with the mixed water tank and the microwave reactor, and the connecting pipes are connected to the lower end of the coil pipe of the microwave reactor; the backward connecting pipe is provided with a water outlet and a circulating water pipe, and the circulating water pipe is communicated with the mixed water tank; and the microwave reactor and the water cooling device are connected with the automatic control system. The microwave catalytic oxidation apparatus is applied to landfill leachate treatment, and is high in microwave utilization rate, long in service life of the magnetron, good in leachate treatment effect, and also can be automatically controlled.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to the field of sewage treatment, and more specifically, to a microwave catalytic oxidation equipment and treatment method for landfill leachate. Background technique [0002] Landfill leachate refers to the moisture contained in the garbage itself in the landfill, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the covering soil, and passing through the garbage layer and the covering soil. a waste water. The components of landfill leachate are complex, the water quality and quantity vary greatly, the content of ammonia nitrogen is high, and the content of organic pollutants is high. It not only contains a large amount of organic pollutants that are difficult to biodegrade, but also contains various heavy metals. It is a kind of high-concentration organic wastewater with complex components. ,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/30C02F1/72
Inventor 林亲铁韩少杰潘永刚
Owner GUANGDONG UNIV OF TECH
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