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A method for treating landfill leachate concentrate using three-dimensional electrodes

A landfill leachate and three-dimensional electrode technology, applied in water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of low organic matter removal rate, unfavorable particle electrode filling and replacement, etc., and achieve good development Prospect and promotion value, reduced number of plates, and low operating costs

Active Publication Date: 2019-06-11
TIANJIN TEDA ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the three-dimensional electrolysis device using the advanced oxidation method has a removal rate of 40%-60% for COD in the membrane filtration concentrated solution, and a removal rate of 50%-70% for ammonia nitrogen; The flow of water will be blocked during the process, and the distance between the plates is 1-5cm, which is not conducive to the filling and replacement of particle electrodes, and the removal rate of organic matter is also low.

Method used

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  • A method for treating landfill leachate concentrate using three-dimensional electrodes
  • A method for treating landfill leachate concentrate using three-dimensional electrodes

Examples

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Effect test

example 1

[0033] The concentrate is taken from the leachate concentrate after the process of "pretreatment-two-stage denitrification / nitrification-MBR membrane biological treatment system-nanofiltration-reverse osmosis" from a landfill in Tianjin. Its main characteristics are: COD Concentration 1500mg / L, ammonia nitrogen concentration 40mg / L, PH=9.

[0034] The concentrated solution is processed by electrolytic cell 4, and redox reaction occurs in the concentrated solution in the electrolytic cell 4. The electrolytic cell 4 adopts a cuboid structure, and an anode plate 3 is respectively arranged on both sides of the electrolytic cell 4. , a cathode plate 7 is arranged between the two anode plates 3, and the cathode plate 7 and the anode plate 3 are connected to the DC power supply 1; the electrolytic cell 4 is filled with particle electrodes 5, and the The top of the electrolytic cell 4 is provided with a liquid inlet 2, the bottom of the electrolytic cell 4 is provided with a liquid ou...

example 2

[0038] The concentrate is taken from the leachate concentrate after the process of "pretreatment-two-stage denitrification / nitrification-MBR membrane biological treatment system-nanofiltration-reverse osmosis" from a landfill in Tianjin. Its main characteristics are: COD Concentration 1500mg / L, ammonia nitrogen concentration 40mg / L, PH=9.

[0039] The concentrated solution is processed by electrolytic cell 4, and redox reaction occurs in the concentrated solution in the electrolytic cell 4. The electrolytic cell 4 adopts a cuboid structure, and an anode plate 3 is respectively arranged on both sides of the electrolytic cell 4. , a cathode plate 7 is arranged between the two anode plates 3, and the cathode plate 7 and the anode plate 3 are connected to the DC power supply 1; the electrolytic cell 4 is filled with particle electrodes 5, and the The top of the electrolytic cell 4 is provided with a liquid inlet 2, the bottom of the electrolytic cell 4 is provided with a liquid ou...

example 3

[0043] The concentrate is taken from the leachate concentrate after the process of "pretreatment-two-stage denitrification / nitrification-MBR membrane biological treatment system-nanofiltration-reverse osmosis" from a landfill in Tianjin. Its main characteristics are: COD Concentration 1500mg / L, ammonia nitrogen concentration 40mg / L, PH=9.

[0044] The concentrated solution is processed by electrolytic cell 4, and redox reaction occurs in the concentrated solution in the electrolytic cell 4. The electrolytic cell 4 adopts a cuboid structure, and an anode plate 3 is respectively arranged on both sides of the electrolytic cell 4. , a cathode plate 7 is arranged between the two anode plates 3, and the cathode plate 7 and the anode plate 3 are connected to the DC power supply 1; the electrolytic cell 4 is filled with particle electrodes 5, and the The top of the electrolytic cell 4 is provided with a liquid inlet 2, the bottom of the electrolytic cell 4 is provided with a liquid ou...

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Abstract

The invention discloses a method for treating landfill leachate concentrated liquor by using a three-dimensional electrode. The concentrated liquor is treated by an electrolytic bath, and is subjected to oxidation-reduction reaction in the electrolytic bath, the electrolytic bath has a cuboid structure, two anode plates are respectively arranged on two sides of the electrolytic bath, and a cathode plate is arranged between the two anode plates; the electrolytic bath is filled with particle electrodes, a liquid inlet is formed in the upper part of the electrolytic bath, a liquid outlet and a sampling opening are formed in the lower part of the electrolytic bath, a drain outlet is formed in the bottom of the electrolytic bath, the anode plates are made of aluminum-containing titanium alloy, the cathode plate is made of stainless steel, and the particle electrodes are coal columnar activated carbon; the filling ratio of the coal columnar activated carbon is 60%-85%; the current density in the electrolytic bath is 8-13 mA / cm<3>; oxidation-reduction reaction time is 20-40 minutes. Pollutants, particularly COD and ammonia nitrogen, in the concentrated liquor can be removed quickly and efficiently, and the biodegradability of the landfill leachate concentrated liquor is improved.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a method for treating landfill leachate concentrate by using a three-dimensional electrode. Background technique [0002] In recent years, with the acceleration of my country's urbanization and the improvement of residents' living consumption levels, the generation of urban domestic waste in my country has increased at a rate of 9%-10% per year. Landfill and incineration are the main methods of waste disposal in my country at this stage. However, whether landfill or incineration is used, a large amount of highly polluting landfill leachate will be produced. [0003] At present, the treatment process of landfill leachate or waste incineration plant is mainly "pretreatment + MBR membrane biological treatment system + nanofiltration + reverse osmosis", the effluent can basically meet the discharge standard, but nanofiltration and reverse osmosis Osmosis technology is a membrane filt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/467C02F1/72C02F1/76
CPCC02F1/461C02F1/46109C02F1/46114C02F1/4672C02F1/4674C02F1/4676C02F2001/46133C02F2001/46152
Inventor 马剑李静冯昱韩檬
Owner TIANJIN TEDA ENVIRONMENTAL PROTECTION