Treatment method of landfill leachate

A landfill leachate and treatment method technology, which is applied in the field of landfill leachate treatment, can solve the problems of difficult treatment, high treatment cost, and high degree of harm, and achieve the effects of increasing the oxidation reaction rate, controlling the degradation rate, and improving the oxidation capacity

Active Publication Date: 2022-03-22
中新联科环境科技(安徽)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The composition of landfill leachate is complex, and the concentration of organic pollutants, inorganic pollutants, heavy metal ions and other pollutants is high. Among them, organic pollutants include aliphatic hydrocarbons, benzene series, organic amines, ketones, ethers, etc., which are refractory and toxic Hazardous substances are a type of typical refractory wastewater, which has the characteristics of wide range of pollution, high degree of harm, difficult treatment, and high treatment cost. It must be effectively treated before it can be connected to the drainage pipe for discharge
[0004] At present, biochemical, advanced oxidation, membrane treatment and other processes are often used to treat refractory organic pollutants in landfill leachate. However, due to the complex composition of landfill leachate, a single process is used to treat benzene series, organic amines, and ketones. When treating refractory organics such as ethers and ethers, problems such as poor removal effect, large residual amount of refractory pollutants, poor biochemical degradation effect and high treatment cost are often faced

Method used

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  • Treatment method of landfill leachate
  • Treatment method of landfill leachate
  • Treatment method of landfill leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of modified anionic polyacrylamide:

[0053] (1) Add 0.01mol methacrylic acid, 0.01mol N,N-diisopropylcarbodiimide, 0.01mol triethylamine, and 60mL tetrahydrofuran into a three-necked flask in turn, stir for 40min, and heat under nitrogen atmosphere To 40°C, add 40 mL of tetrahydrofuran solution containing 0.01 mol of 4-aminobenzenesulfonate dropwise at a rate of 2 drops / second, stir and react for 12 hours, then filter the reaction solution, take the filter cake, wash it, and dry it in vacuum to obtain Benzenesulfonic acid monomer;

[0054] (2) After mixing 0.011mol 3-buten-1-ol and 50mL ethanol, stir evenly, then add 0.01mol sodium hydroxide, then raise the temperature to 30°C while stirring, add 0.01mol carbon disulfide dropwise, drop The acceleration is 3 drops / second. After the addition is complete, continue the constant temperature reaction for 4 hours, stop the reaction, wash with hexane several times, and dry to obtain the dithiocarboxy monomer;

[...

Embodiment 2

[0057] Preparation of modified anionic polyacrylamide:

[0058] (1) Add 0.015mol methacrylic acid, 0.015mol N,N-diisopropylcarbodiimide, 0.015mol triethylamine, and 120mL tetrahydrofuran into a three-necked flask in turn, stir for 40min, and heat under nitrogen atmosphere To 40°C, add 80 mL of tetrahydrofuran solution containing 0.01 mol of 4-aminobenzenesulfonate dropwise at a rate of 2 drops / second, stir and react for 12 hours, then filter the reaction solution, take the filter cake, wash it, and dry it in vacuum to obtain Benzenesulfonic acid monomer;

[0059] (2) After mixing 0.014mol 3-buten-1-ol and 90mL ethanol, stir evenly, then add 0.01mol sodium hydroxide, then raise the temperature to 30°C while stirring, add 0.01mol carbon disulfide dropwise, drop The acceleration is 5 drops / second. After the addition is complete, continue the constant temperature reaction for 4 hours, stop the reaction, wash with hexane several times, and dry to obtain the dithiocarboxy monomer; ...

Embodiment 3

[0062] The biochemical effluent of landfill leachate was selected as the treatment object, and the indicators of the biochemical effluent of the landfill leachate are shown in Table 1:

[0063] Table 1

[0064]

[0065] See processing steps figure 1 As shown, the processing parameters are as shown in Table 2:

[0066] Table 2

[0067]

[0068]

[0069] The indicators of the discharged water are shown in Table 3.

[0070] table 3

[0071]

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Abstract

The invention relates to a landfill leachate treatment method, which belongs to the technical field of wastewater treatment, and comprises the following steps: 1, adjusting the pH value of landfill leachate to obtain pH-adjusted wastewater; step 2, adding an iron-carbon filler into the wastewater subjected to pH regulation, and then adding ferrous sulfate heptahydrate and hydrogen peroxide to obtain wastewater subjected to oxidation treatment; 3, aerating the wastewater subjected to oxidation treatment to obtain wastewater subjected to aeration treatment; step 4, adding a flocculating agent and a coagulant aid into the wastewater subjected to aeration treatment for flocculating settling, and filtering to obtain filtrate; and 5, adjusting the pH value of the filtrate, adding persulfate into the wastewater under the conditions of ultraviolet light irradiation activation and ozone aeration, carrying out an oxidation reaction, and discharging. According to the method, the removal rate of organic matters is increased through an iron-carbon micro-electrolysis-Fenton and ozone-ultraviolet-persulfate two-round composite oxidation process; and the modified anionic polyacrylamide coagulant aid is introduced, so that the flocculation effect is improved.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a 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 high concentration of organic wastewater. [0003] The composition of landfill leachate is complex, and the concentration of organic pollutants, inorganic pollutants, heavy metal ions and other pollutants is high. Among them, organic pollutants include aliphatic hydrocarbons, benzene series, organic amines, ketones, ethers, etc., which are refractory and toxic Hazardous substances are a typical type of refractory wastewater, which has the characteristics of wide pollution range, high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/32C02F1/467C02F1/461C02F1/52C02F1/56C02F1/66C02F1/72C02F1/78C02F101/30C02F103/06
CPCC02F9/00C02F1/4672C02F1/78C02F1/72C02F1/32C02F1/66C02F1/5245C02F1/56C02F2101/30C02F2103/06C02F2301/08C02F2305/023C02F2305/026
Inventor 吴文明丁保强马林张治杰李淑艳王娣张宇
Owner 中新联科环境科技(安徽)有限公司
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