Advanced treatment method for heavy metal sewage of refuse landfill

A landfill and advanced treatment technology, applied in water/sewage treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc., can solve heavy metal content reduction, suspended solids, high turbidity, high salt content, etc. problem, to achieve the effect of strong adsorption capacity and avoid pollution

Pending Publication Date: 2021-06-08
江西楚杭环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among them, heavy metal pollution is the main problem. The water quality of heavy metal sewage is complex, usually with high suspended solids and turbidity, high salt content, high chemical oxygen demand, and many types of heavy metals. The existing treatment technology cannot treat it well. removal, and chemical reactions are easy to occur during the treatment process. Although there are many conventional heavy metal sewage treatment methods, the effect of reducing heavy metal content is not good, especially for the advanced treatment of heavy metal sewage, which can improve the removal effect of heavy metals in sewage. Carry out deep purification treatment to make it meet the emission standard

Method used

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  • Advanced treatment method for heavy metal sewage of refuse landfill

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Embodiment 1

[0025] A method for advanced treatment of heavy metal sewage in a landfill, comprising the following steps:

[0026] (1) Pretreatment: The garbage in the landfill is first sorted and filtered by the garbage sorting machine, the remaining residue is extruded by the extruder to extrude water, and then the extruded material and sediment are removed by the filter device, and the remaining wastewater is passed through Into the regulating tank, take 1L of waste water, measure the content of various heavy metals, and calculate the total content of heavy metals;

[0027] (2) PH value adjustment: add 20 parts of sodium hydroxide in the adjustment tank, adjust the pH to 10, add a remover in the reaction tank, the dosage is 10 times the total content of heavy metals, and stir for 20min, wherein the remover is hexane 7 parts of diamine; 1 part of sewage aluminum sulfate, 3 parts of carbon disulfide, 2 parts of sodium hydroxide, 0.1 part of magnesium oxide, and 44 parts of water;

[0028]...

Embodiment 2

[0034] A method for advanced treatment of heavy metal sewage in a landfill, comprising the following steps:

[0035] (1) Pretreatment: The garbage in the landfill is first sorted and filtered by the garbage sorting machine, the remaining residue is extruded by the extruder to extrude water, and then the extruded material and sediment are removed by the filter device, and the remaining wastewater is passed through Into the regulating tank, take 1L of waste water, measure the content of various heavy metals, and calculate the total content of heavy metals;

[0036] (2) PH value adjustment: add 25 parts of sodium hydroxide and sulfuric acid in the adjustment tank, adjust the pH to 10, add a remover in the reaction tank, the dosage is 15 times the total content of heavy metals, and stir for 40min, wherein the remover 10 parts of hexanediamine; 2 parts of sewage aluminum sulfate, 8 parts of carbon disulfide, 2 parts of sodium hydroxide, 0.2 parts of magnesium oxide, and 55 parts of...

Embodiment 3

[0043] A method for advanced treatment of heavy metal sewage in a landfill, comprising the following steps:

[0044] (1) Pretreatment: The garbage in the landfill is first sorted and filtered by the garbage sorting machine, the remaining residue is extruded by the extruder to extrude water, and then the extruded material and sediment are removed by the filter device, and the remaining wastewater is passed through Into the regulating tank, take 1L of waste water, measure the content of various heavy metals, and calculate the total content of heavy metals;

[0045] (2) PH value adjustment: add 25 parts of sodium hydroxide in the adjustment tank, adjust the pH to 11, add a remover in the reaction tank, the dosage is 15 times the total content of heavy metals, and stir for 45min, wherein, the remover is hexane 10 parts of diamine; 3 parts of sewage aluminum sulfate, 10 parts of carbon disulfide, 2 parts of sodium hydroxide, 0.3 parts of magnesium oxide, 60 parts of water;

[0046...

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Abstract

The invention discloses an advanced treatment method for heavy metal sewage of a refuse landfill. The advanced treatment method comprises the following steps: performing pretreatment; adjusting the pH value; introducing a coagulant of which the dosage is equivalent to that of the remover into the coagulating basin, and stirring for 5-20 minutes; introducing 0.1%-0.3% of a composite flocculant into the flocculation basin, performing slow stirring for 5-15 min, and then performing precipitation for 20-60 min; using a plasma catalytic oxidation water treatment system for reaction for 1-2 h; carrying out RO (Reverse Osmosis) treatment; and performing circular treatment. The remover has very strong chelating ability, can form chelated precipitates which are completely insoluble in water with heavy metals, can treat different types of heavy metal wastewater, and the composite coagulant has strong adsorption ability, and can effectively remove organic pollutants, heavy metals and harmful components in the landfill leachate; and the system is further provided with a multi-stage purification device, heavy metal sewage of the refuse landfill is subjected to deep treatment, and pollution of the heavy metal sewage is avoided.

Description

technical field [0001] The invention relates to the technical field of garbage disposal, in particular to a method for advanced treatment of heavy metal sewage in a garbage landfill. Background technique [0002] Garbage disposal has always been one of the important issues to be solved urgently in today's society. With the improvement of science and technology, the pollutants contained in garbage are becoming more and more complex, and a large amount of garbage is directly thrown into the landfill without sorting, causing pollution. It is also not to be underestimated. [0003] Among them, heavy metal pollution is the main, and heavy metal sewage has complex water quality components, usually with high suspended solids and turbidity, high salt content, high chemical oxygen demand, and many types of heavy metals. Removal, and it is easy to produce chemical reactions during the treatment process. Although there are many conventional heavy metal sewage treatment methods, the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/44C02F1/52C02F1/66C02F1/72C02F101/20C02F101/30C02F103/06
CPCC02F9/00C02F1/66C02F1/52C02F1/725C02F1/441C02F1/442C02F2101/20C02F2101/30C02F2301/08C02F2209/08C02F2303/04C02F2103/06C02F2305/023
Inventor 郭群刘誉菲
Owner 江西楚杭环保科技有限公司
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