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Modified coke for treating aged landfill leachate, preparation method of modified coke and treatment method of aged landfill leachate

A technology of landfill leachate and activated coke, applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of transferring pollutants back to the environment, increasing the process and treatment costs, and expanding the pores. Compared with the adsorption specific surface, the effect of solving the difficult treatment and increasing the adsorption capacity and capacity

Inactive Publication Date: 2015-03-18
黄伟生
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the common problem with them is how to deal with the exhausted adsorption carriers, that is, if they are regenerated and reused, the process and treatment costs will be increased, and if they are not disposed of directly or landfilled, the pollutants will be transferred back to the environment.
[0007] Public literature reports on the treatment of aged landfill leachate by reaction adsorption are relatively rare

Method used

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  • Modified coke for treating aged landfill leachate, preparation method of modified coke and treatment method of aged landfill leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, the preparation of modified coke product

[0033] Take industrial coke and grind it into a fine particle powder and pass it through a 200-mesh sieve. Put 1kg of the sieved powder into a 2L 5% sodium hydroxide dilute lye heating kettle and boil for 15 minutes, cool and filter.

[0034] Put the coke powder after alkali cooking into the enamel reaction kettle with 3-10% dilute nitric acid solution with a concentration of 3-8% copper nitrate dissolved in advance, soak at room temperature for 2 hours, filter, separate, and wash with water to pH If it is neutral, put it in a drying oven at 105°C and dry it for later use.

[0035] Take 1.7L of butyl phthalate (industrial pure grade) and add it to a reaction kettle filled with 8L ethanol (industrial pure grade) in advance, stir at room temperature until dissolved, then add 30g of iron nitrate, adjust pH=2-3 with dilute nitric acid, Stir at low temperature for 30 minutes, then add 1kg of activated coke to the reac...

Embodiment 2

[0036] Implementation example 2, the treatment test of different aged landfill leachates

[0037] Put 1 kg of the modified coke product obtained through the above steps into a filter column with a diameter of 20 cm and fill it up.

[0038] Adjust the pH of 20L landfill leachate in the head tank to about 8, then let it flow in from the upper conduit, slowly pass through the coke reaction adsorption column, and then flow out from the lower conduit. The flow rate is controlled by the flow valve, and the flow rate is 0.8m / h. The leachate is taken from the waste landfill and the outlet of the biochemical treatment process of the landfill leachate treatment plant. The test results are shown in Table 1.

[0039] The results show that the modified coke has obvious effects on water quality indicators such as CODcr, NH+4-N and chromaticity of aged landfill leachate degraded by different biological methods. The waste coke after saturated adsorption can still be recovered as fuel withou...

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Abstract

The invention relates to the fields of environmental chemistry and water treatment engineering, and in particular relates to a modified coke for treating aged landfill leachate, a preparation method of the modified coke and a treatment method of the aged landfill leachate. The industrial coke having porosity, adsorbability and flammability is taken as a carrier, and alkali / acid activation is combined with a surface chemical compound modification technology of Cu<2+> and dibutyl phthalate polycondensate, so that the modified coke material suitable for adsorbing, purifying and modifying the aged landfill leachate can be prepared. The modified coke not only has an obvious selective adsorption and desorption effect for organic pollutants and ammonia nitrogen molecules in sewage, but also can be stilled recycled as fuel after being used, so that the problem of aftertreatment of waste residue does not exist.

Description

technical field [0001] The invention relates to the fields of environmental chemistry and water treatment engineering, in particular to the adsorption treatment technology and materials for aged landfill leachate, and in particular to a modified coke for treating aged landfill leachate and its preparation method and treatment method. Background technique [0002] Ordinary landfill leachate is a kind of high-concentration organic wastewater with very complex components. The concentration of pollutants such as CODcr, ammonia nitrogen and heavy metal ions is significantly higher than that of ordinary urban sewage. The usual biochemical treatment methods cannot make the effluent meet the standard, and must be added Other physical-chemical treatment methods. [0003] Aged landfill leachate in a broad sense includes leachate that has been in landfill for a long time, and ordinary landfill leachate that has undergone biochemical degradation in water treatment plants and has not rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/20B01J20/305B01J2220/42C02F1/283
Inventor 黄伟生
Owner 黄伟生
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