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Advanced garbage leachate treatment method

A landfill leachate and advanced treatment technology, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve problems that have not yet been reported in research, and achieve good controllability and energy utilization High, the effect of inhibiting the side reaction of oxygen evolution

Inactive Publication Date: 2010-11-24
北京大学科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the use of BDD electrodes for advanced treatment of landfill leachate has a good application prospect, but there is no research report in this area

Method used

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Experimental program
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Embodiment 1

[0024] Using a 20×20mm BDD electrode as the anode, stainless steel of the same size as the cathode, and an electrode spacing of 10mm, electrochemical oxidation advanced treatment of landfill leachate biological water, COD is 564.9mg L -1 around, the current density is 20mAcm -2 . Samples were taken from the reactor every 2 hours to analyze the COD value, and the unit energy consumption was calculated. The experimental results are listed in Table 1. After 8 hours of electrolysis, the passing electricity is 2.56Ah L -1 , the COD of landfill leachate biological effluent was reduced to 275.5mg L -1 , reaching the national secondary emission standard (COD-1 ), the energy consumption is only 13.93kWh m -3 . Table 1 The current density is 20mA cm -2 Biological effluent process of landfill leachate treated by BDD electrode electrochemical oxidation under certain conditions

[0025] Medium COD and E sp changes in

[0026]

Embodiment 2

[0028] Using a 20×20mm BDD electrode as the anode, stainless steel of the same size as the cathode, and an electrode spacing of 10mm, electrochemical oxidation advanced treatment of landfill leachate biological water, COD is 564.9mg L -1 around, the current density is 40mAcm -2 . Samples were taken from the reactor every 2 hours to analyze the COD value, and the unit energy consumption was calculated. The experimental results are listed in Table 2. After 8 hours of electrolysis, the passing electricity is 5.12Ah L -1 , the COD of landfill leachate biological effluent was reduced to 89.0mg L -1 , reaching the national first-level emission standard (COD-1 ), while the energy consumption is only 34.79kWh m -3 . Table 2 The current density is 40mA cm -2 Biological effluent process of landfill leachate treated by BDD electrode electrochemical oxidation under certain conditions

[0029] Medium COD and E sp changes in

[0030]

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Abstract

The invention discloses an advanced garbage leachate treatment method, which belongs to the field of wastewater treatment. In the method, a boron-doped diamond (BDD) film electrode is used as an anode and stainless steel is used as a cathode; and the advanced treatment is performed on garbage leachate biologic effluent by an electrochemical oxidation method. The garbage leachate biologic effluent is the effluent after the treatment process of an anaerobic biological filter, a biological aeration filter, AO secondary treatment and MBR (the patent publication number is CN 101708919A). When the passing electric quantity is 5.12 Ah L<-1>, the chemical oxygen demand (COD) of the garbage leachate biologic effluent can be reduced from 564.9 mg L<-1> to 89.0 mg L<-1>, which reaches the national level of discharge standard, and the energy consumption is only 34.79kWh m<-3>. The method has the advantages of good treatment effect, high energy utilization ratio, high controllability, environmental friendliness and the like, and overcomes the defects of the conventional garbage leachate treatment process.

Description

technical field [0001] The invention relates to a method for treating waste water, which belongs to the field of waste water treatment, in particular to a method for electrochemically oxidizing advanced landfill leachate by using a boron-doped diamond film BDD electrode as an anode. Background technique [0002] Landfill leachate refers to the sewage containing a large amount of suspended solids and high concentrations of organic or inorganic components produced by the rainwater infiltrated from the surface of the landfill in the landfill, leaching through the garbage layer and the covering soil layer. In recent years, their impact on the environment has attracted extensive attention from scholars at home and abroad, and the corresponding treatment methods and processes have also become one of the research hotspots. Due to the complex water quality and high pollutant content of landfill leachate, it contains more hydrocarbons and their derivatives, esters, alcohols and pheno...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F9/14
Inventor 倪晋仁朱秀萍
Owner 北京大学科技开发有限公司
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