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Landfill leachate treatment process

A landfill leachate and treatment process technology, which is applied in the field of leachate concentrate evaporation device, can solve the problems of high energy consumption, equipment corrosion, scaling, etc., and achieve the advantages of prolonging the cleaning cycle, solving corrosion problems, and slowing down the scaling rate Effect

Inactive Publication Date: 2021-10-22
GUIZHOU OURUIXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at the operating temperature of the above technology, the enriched Cl in the concentrate - Will cause severe corrosion to equipment
Moreover, the high concentration of humic substances and inorganic ions in the concentrated solution will lead to serious fouling, reducing heat transfer efficiency and evaporation energy efficiency ratio
Therefore, the existing evaporation method requires high energy consumption, and the evaporation facilities are prone to coking and scaling. In order to improve the operation efficiency, titanium metal is often used as the raw material of the equipment, which leads to the practical problems of large investment and expensive maintenance.
These factors have restricted the application of evaporation technology in the treatment of leachate concentrate.

Method used

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  • Landfill leachate treatment process
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Examples

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Effect test

Embodiment 1

[0027] Embodiment 1, a kind of treatment process of landfill leachate figure 1 As shown, in step 1, the landfill leachate is sent to the biochemical treatment system, first passes through the adjustment tank, settles and separates the landfill leachate, and at the same time performs water quality homogenization and water volume adjustment; after that, the regulated The landfill leachate adjusted by the tank is put into the anaerobic tank and evenly mixed with the anaerobic granular sludge. Most of the organic matter is converted into biogas here, and the unremoved organic matter in the landfill leachate is further degraded by the anaerobic granular sludge. Decompose the macromolecular refractory organic matter into easily degradable organic matter, so that the landfill leachate can be better purified; put the landfill leachate after anaerobic treatment into the facultative tank, the so-called facultative refers to the difference between anaerobic and good A state between oxyge...

Embodiment 2

[0031] Embodiment 2, a kind of treatment process of landfill leachate such as figure 2 As shown, in step 1, the landfill leachate is sent to the biochemical treatment system, first passes through the adjustment tank, settles and separates the landfill leachate, and at the same time performs water quality homogenization and water volume adjustment; after that, the regulated The landfill leachate adjusted by the tank is put into the anaerobic tank and evenly mixed with the anaerobic granular sludge. Most of the organic matter is converted into biogas here, and the unremoved organic matter in the landfill leachate is further degraded by the anaerobic granular sludge. Decompose the macromolecular refractory organic matter into easily degradable organic matter, so that the landfill leachate can be better purified; put the landfill leachate after anaerobic treatment into the facultative tank, the so-called facultative refers to the difference between anaerobic and good A state betw...

Embodiment 3

[0035] The difference between Example 3 and Example 2 is that the washing water is slightly alkaline water, and the ratios of washing water to fly ash are 4:1, 3:1 and 3:1.

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Abstract

The invention discloses a landfill leachate treatment process, and belongs to the technical field of landfill treatment, landfill leachate sequentially passes through a biochemical treatment system, a pretreatment system, a membrane treatment system and a desalination treatment system, and the biochemical treatment system comprises a regulating tank, an anaerobic tank, a facultative tank and an aerobic tank; the pretreatment system comprises a microfiltration filter and a quartz sand filter, the membrane treatment system comprises a nanofiltration system and a reverse osmosis system, and further comprises a chemical backwashing system, a leachate concentrated solution generated by the membrane treatment system is fed into the desalination treatment system, the desalination treatment system is a magnetoelectric desalination evaporation system or a washing desalination system, magnetoelectric desalting or incineration washing fly ash desalting treatment is adopted, and the problems of high energy consumption and easy scaling caused by traditional evaporation method treatment are further reduced.

Description

technical field [0001] The invention relates to the technical field of garbage landfill treatment, in particular to a leachate concentrated liquid evaporation device. Background technique [0002] The water content of domestic waste is relatively high, coupled with the leaching effect of rainfall, surface groundwater inflow, microbial decomposition, groundwater infiltration and other reasons, about 7%-30% leachate is produced per ton of domestic waste. Domestic waste leachate is composed of various organic compounds and inorganic substances, and contains extremely high concentrations of BOD, COD, ammonia nitrogen, phosphorus, organic substances, sulfides and inorganic salts, etc. It has a foul smell and contains a large number of carcinogens. The pollutants contained in each ton of landfill leachate are equivalent to 100 tons of domestic sewage. The toxicity is far greater than that of conventional domestic sewage. If it is not treated properly, it will seriously pollute the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/06
CPCC02F9/00C02F2103/06C02F1/001C02F1/441C02F1/442C02F1/469C02F1/46C02F1/48C02F1/048C02F1/043C02F2303/14C02F2303/16C02F3/02C02F3/28C02F3/30C02F3/302C02F3/34Y02A20/131
Inventor 刘伟刘滨
Owner GUIZHOU OURUIXIN ENVIRONMENTAL PROTECTION TECH
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