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Method for treating leachate through evaporation and membrane filtration

A technology of leachate and membrane filtration, which is applied in filtration treatment, water/sewage treatment, water treatment parameter control, etc., and can solve problems such as low treatment efficiency, complicated treatment process, and difficulty in meeting treatment standards

Inactive Publication Date: 2021-06-01
山东中能环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to meet the treatment standard through the existing process methods, and the treatment process is complicated and the treatment efficiency is low, so it is not suitable for large-scale leachate treatment.

Method used

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  • Method for treating leachate through evaporation and membrane filtration
  • Method for treating leachate through evaporation and membrane filtration
  • Method for treating leachate through evaporation and membrane filtration

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Embodiment Construction

[0024] Embodiments of the method for treating leachate by evaporation and membrane filtration in the present invention are as follows: figure 1 Shown: includes the following steps,

[0025] Step 1, filtration and pretreatment, filter the collected leachate, remove blocky solids with a cross-sectional size greater than 1mm, obtain coarse filter residue and crude filtrate, add polyacrylamide to the crude filtrate for precipitation, and filter out the precipitate to obtain Pretreatment filtrate and secondary filter residue, the pH of the pretreatment filtrate is set to be greater than 9, and the residual foreign matter in the pretreatment filtrate is less than 100 μm, and the coarse filter residue and secondary filter residue are stored and sent to the garbage incinerator;

[0026] Step 2, evaporation and concentration, the pretreatment filtrate in step 1 is added to a mechanical recompression evaporator, evaporated and concentrated to form a primary condensate and a primary conc...

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PUM

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Abstract

The invention discloses a method for treating leachate through evaporation and membrane filtration, which comprises the following steps: performing steps of filtration and pretreatment, evaporation and concentration, deep treatment and ammonia nitrogen removal: enabling the leachate to sequentially pass through a mechanical cleaning prefilter, a mechanical recompression evaporator, an ozone catalytic oxidation device and a hollow fiber membrane ammonia nitrogen removal device, and treating the leachate into discharge liquid and ammonia water which can reach the discharge standard. The leachate can be effectively treated, meanwhile, the treatment effect is good, and large-scale treatment is carried out.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating leachate through evaporation and membrane filtration. Background technique [0002] Leachate refers to the liquid containing organic or inorganic components produced by the physical, biological and chemical effects of compaction, fermentation, etc. during the process of stacking and landfilling garbage, and the seepage of precipitation and other external water. Urban life COD of landfill leachate cr Generally 15000~30000mg / L, BOD 5 The content is 8000~20000mg / L, NH 3 -N content is 1500~3500mg / L, TP is 70~100mg / L, TN is 1800~4000mg / L, SS is 500~2500mg / L, if the landfill leachate is directly discharged into the environment without treatment, it will cause Serious environmental pollution. To protect the environment, leachate treatment is essential. At present, when processing in conjunction with the waste-to-energy system, in addition to the p...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/56C02F1/04C02F1/78C02F1/66C02F1/44
CPCC02F9/00C02F1/001C02F1/56C02F1/04C02F1/78C02F1/66C02F1/44C02F2209/08C02F2209/14C02F2209/10C02F2209/06C02F2209/05C02F2201/782
Inventor 王智健柯鲁靖王仁和朱怡桦邹恩特
Owner 山东中能环保科技股份有限公司
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