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A method for pretreatment of landfill leachate through combination of organic bentonite and TiO2

A technology of landfill leachate and bentonite, which is applied in the direction of adsorption water/sewage treatment, light water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problem of low pollutant removal efficiency, improve the treatment effect and reduce the odor , the effect of convenient management

Active Publication Date: 2013-09-11
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies that rely solely on bentonite or modified bentonite as adsorbents and are applied to landfill leachate treatment, but there is a common problem of low pollutant removal efficiency.

Method used

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  • A method for pretreatment of landfill leachate through combination of organic bentonite and TiO2
  • A method for pretreatment of landfill leachate through combination of organic bentonite and TiO2
  • A method for pretreatment of landfill leachate through combination of organic bentonite and TiO2

Examples

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Embodiment 1

[0032] a kind of like figure 1 , 2 Shown organobentonite and TiO of the present invention 2 A method for joint pretreatment of landfill leachate, comprising the following steps:

[0033] (1) Preparation of organobentonite (technical route see image 3 )

[0034] (1.1) Slowly add 20ml of hydrochloric acid solution with a mass fraction of 36.5% and 30ml of concentrated sulfuric acid with a mass fraction of 98% into 750ml of distilled water, stir well and cool to room temperature to obtain a mixed acid solution (solution a);

[0035] (1.2) Add 100g of raw bentonite to 800ml of mixed acid solution (mixed acid pickling), and stir at room temperature for 5 hours with a magnetic stirrer at a speed of 1200r / min to obtain bentonite mixed acid solution (solution b);

[0036] (1.3) Add 2.5g cetyltrimethylammonium bromide (CTMAB), 1.0g polyaluminum chloride (PAC) and 0.1g polyacrylamide (PAM) to the bentonite mixed acid solution obtained in step (1.2), Stir with a magnetic stirrer at...

Embodiment 2

[0046] a kind of like figure 1 , 2 The organobentonite and TiO of the present invention shown 2 A method for joint pretreatment of landfill leachate, comprising the following steps:

[0047] (1) Preparation of organobentonite: same as step (1) in Example 1.

[0048] (2) Pretreatment of landfill leachate (see figure 1 and figure 2 )

[0049] (2.1) Add 1L of landfill leachate into the reactor through the water inlet pump 2, and use H with a concentration of 6mol / L 2 SO 4 The solution adjusts the pH value of the landfill leachate to 5.0;

[0050] (2.2) Dosing TiO into the reactor 2 With the organobentonite (CTMAB 2.5) prepared above, add 4g of organobentonite and 3g of TiO per liter of landfill leachate 2 , then start the air pump 6 and turn on the submerged UV lamp 1 with a dominant wavelength of 365nm (photocatalytic reaction), the microporous aeration disc 4 starts aeration, and the aeration volume of the air pump 6 is controlled by the rotameter 5 to 0.4L / min, aft...

Embodiment 3

[0055] a kind of like figure 1 , 2 The organobentonite and TiO of the present invention shown 2 A method for joint pretreatment of landfill leachate, comprising the following steps:

[0056] (1) Preparation of organobentonite: same as step (1) in Example 1.

[0057] (2) Pretreatment of landfill leachate (see figure 1 and figure 2 )

[0058] (2.1) Add 1L of landfill leachate into the reactor through the water inlet pump 2, and use H with a concentration of 6mol / L 2 SO 4 The solution adjusts the pH value of the landfill leachate to 5.0;

[0059] (2.2) Dosing TiO into the reactor 2 With organic bentonite CTMAB 2.5, add 6g of organic bentonite and 3g of TiO per liter of landfill leachate 2 , then start the air pump 6 and turn on the submerged UV lamp 1 with a dominant wavelength of 365nm (photocatalytic reaction), the microporous aeration disc 4 starts aeration, and the aeration volume of the air pump 6 is controlled by the rotameter 5 to 0.4L / min, after the reaction w...

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PUM

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Abstract

The present invention discloses a method for pretreatment of landfill leachate through combination of organic bentonite and TiO2. The method comprises the following steps: putting organic bentonite and TiO2 into the landfill leachate with a pH value of 4.0 to 6.0 for reaction, wherein the dosage of the organic bentonite is 2g / L ~ 10g / L, and the dosage of TiO2 is 0.5g / L ~ 5g / L; providing an ultraviolet light source to the reaction mixture and performing aeration; after the reaction is completed, precipitating obtained reaction products and obtaining a supernatant liquid and sediment, wherein the resulting supernatant liquid is pretreated leachate. The method is simple, good in treatment effect, high in efficiency, low in cost and less in pollution.

Description

technical field [0001] The invention relates to a pretreatment method of landfill leachate and the application of mineral materials in the field of environmental protection, in particular to a method for pretreating landfill leachate by combining an adsorption method and an advanced oxidation method. Background technique [0002] At present, the sanitary landfill method is a domestic waste treatment method commonly used at home and abroad, but the landfill leachate produced during the landfill process is a thorny problem. Landfill leachate has complex components, high concentrations of organic matter and ammonia nitrogen, unbalanced ratio of nutrients, poor biochemical properties, and large fluctuations in water quality and volume. If it is not treated in a timely and effective manner, it will easily cause secondary pollution of groundwater and soil, which will affect the entire ecology. system and human health are seriously threatened. [0003] With the increasing hazards ...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/28C02F1/72
Inventor 蔡菲菲杨朝晖黄兢王慧玲曾光明
Owner HUNAN UNIV
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