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Method for treating garbage leachate

A landfill leachate and treatment method technology, applied in the field of wastewater treatment, can solve the problems of large fluctuations in treatment volume, difficult cleaning, secondary pollution, etc., and achieve the effects of no secondary pollution, good treatment effect, and low operating costs

Active Publication Date: 2010-07-07
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the maintenance and replacement of membrane modules are frequent, difficult to clean, easy to clog, large fluctuations in treatment capacity, high operating costs, and at the same time, the concentrated water generated by membrane treatment is difficult to treat and prone to secondary pollution. These shortcomings restrict its use in landfill leachate treatment. promotion in

Method used

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  • Method for treating garbage leachate

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Effect test

Embodiment 1

[0017] A pilot test study was carried out on the leachate of a landfill in Guangxi. The raw water CODcr was about 5000mg / L, the hydraulic retention time of the regulating tank was 4h, the flocculants PAC 200mg / L, PAM 2mg / L were added, and the surface load of the primary sedimentation tank was 0.8m 3 / m 2 h, the pre-acidification time is 4 hours, and the pH value of the wastewater is adjusted to about 7 and pumped into the anaerobic reactor. m 3 d, the hydraulic retention time of pool A is 1d, the hydraulic retention time of pool O is 2d, and the volume load of SBR pool is 0.3kBOD / m 3 d. Dissolved oxygen is 2mg / L, sludge concentration is about 3500mg / L, SBR effluent COD is about 380mg / L, the hydraulic retention time of the intermediate pool is 4h, and the effluent of the intermediate pool is pumped into the fenton oxidation tower. The fenton oxidation used in this embodiment The tower is an upflow multiphase wastewater treatment oxidation tower, with fenton reagent H 2 o 2 ...

Embodiment 2

[0019]A pilot test study was carried out on the landfill leachate in Guangxi, the raw water CODcr was about 7000mg / L, the hydraulic retention time of the regulating tank was 4h, the flocculant PAC250mg / L, PAM3mg / L was added, and the surface load of the primary sedimentation tank was 1m 3 / m 2 h, the pre-acidification time is 4 hours, and the pH value of the wastewater is adjusted to about 7 and pumped into the anaerobic reactor. m 3 d, the hydraulic retention time of pool A is 1d, the hydraulic retention time of pool O is 2d, and the volume load of SBR pool is 0.5KgBOD / m 3 d. Dissolved oxygen is 2.5mg / L, sludge concentration is about 4000mg / L, SBR effluent COD is about 500mg / L, the hydraulic retention time of the middle pool is 4h, and the effluent of the middle pool is pumped into the fenton oxidation tower. The fenton used in this example The oxidation tower is an upflow multiphase wastewater treatment oxidation tower, with fenton reagent H 2 o 2 2500mg / L, FeSO 4 1200...

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Abstract

The invention discloses a method for treating garbage leachate. The method treats the garbage leachate by using the combined technique of pretreatment, biochemical treatment and advanced treatment, wherein the pretreatment adopts a method of coagulating sedimentation, reduces the concentration of organic matters, ammonia nitrogen and metallics, and reduces the inhibiting effect on the subsequent biochemical treatment; the biochemical treatment uses an anaerobic process, an A / O process and SBR to biochemically degrade wastewater, thereby simultaneously removing the organic matters and achieving the goal of denitrification; and finally, Fenton advanced oxidation and air flotation are used for carrying out the advanced treatment, and the strong oxidizing property of hydroxyl free radicals is utilized to oxidize the organic matters, which are difficult to be biochemically degraded, in waste water, thereby ensuring that the outlet water is discharged after reaching the standard. The invention has the advantages of simple operation of the technique, low operating cost, good treatment effect, no secondary pollution and the like, and the advanced treatment can ensure that the outlet water is discharged after reaching the standard. The outlet water meets the standard for pollution control on the landfill site of municipal solid waste (GB 16889-2008).

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating landfill leachate. Background technique [0002] Landfill leachate is a kind of waste water with complex water quality, containing a variety of toxic and harmful inorganic and organic substances, high COD concentration, poor biodegradability, high chroma, and foul smell. It has the following characteristics: (1) The water quality is complex and extremely harmful; (2) COD CR and BOD 5 (3) The content of ammonia nitrogen is high, and it will increase with the extension of landfill time; (4) There are many types of organic pollutants, and the content of metals is high; (5) The water quality changes greatly. If the landfill leachate enters the environment, it will pollute the water quality of the surrounding groundwater and cause serious pollution to the soil, groundwater and drinking water of the surrounding people. At present, with the economic developme...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F3/28C02F3/30C02F3/12C02F1/72C02F1/24C02F1/66
CPCY02W10/10
Inventor 宋海农陈永利韦海浪黄清辉
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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