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Method of purifying percolate from urban landfill field

A technology for purification and treatment of municipal waste, applied in chemical instruments and methods, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of surrounding soil and groundwater pollution, imbalance of microbial nutrition, black and unpleasant smell, etc. , to achieve the effect of easy operation, short processing cycle and small footprint

Inactive Publication Date: 2004-11-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most cities use methods such as sanitary landfill with relatively mature technology and low treatment cost, high-temperature composting and landfill after screening for domestic waste. A certain amount of leachate is produced, which contains a large amount of humic acid, fumaric acid and NH produced by protein decomposition. 4 + , waste batteries and other heavy metals, the concentration of ammonia nitrogen is high, the composition is complex, and the nutritional ratio of microorganisms is out of balance. Not only is it extremely black and smelly, but its pollution concentration is 10-100 times that of ordinary urban sewage, directly causing serious damage to the surrounding soil and groundwater. Pollution, wherever it goes, plants cannot grow, therefore, it is imminent to do a good job in the purification of landfill leachate

Method used

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  • Method of purifying percolate from urban landfill field
  • Method of purifying percolate from urban landfill field
  • Method of purifying percolate from urban landfill field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: 15L of sewage is pumped into the reaction tank, milk of lime containing 33g of unslaked lime is added, the air compressor is started to aerate for 20 minutes, and the water body is stirred evenly, and 60 grams of ferrous sulfate and 7.5 milliliters of 30% hydrogen peroxide are added successively, After the precipitate turns from brown-green to brown-yellow, adjust the pH of the treatment solution to 7 with 60 milliliters of 10% sulfuric acid. Stop the aeration and let it stand for 30-40 minutes. The supernatant liquid can be discharged, and the bottom sludge flows into the drying tank to be dried and returned to the landfill for landfill or mixed with garbage sludge as fertilizer. The suspended matter in the supernatant is 70mg / L, BOD 5 25mg / L, COD Cr 196mg / L, ammonia nitrogen 12mg / L coliform group last 10 -2 .

Embodiment 2

[0035] Embodiment 2: pump 15L of sewage into the reaction tank, add milk of lime containing 20g of quicklime, start the air compressor to aerate for 30 minutes and stir the water body evenly, add 80g of ferrous sulfate and 8.5ml of 30% hydrogen peroxide successively, etc. After the precipitate changed from brown-green to brown-yellow, the pH of the treatment solution was adjusted to 8 with 40 ml of 10% sulfuric acid. Stop the aeration and let it stand for 30-40 minutes. The suspended matter in the supernatant is 65mg / L BOD 5 28mg / L COD Cr 215mg / L Ammonia Nitrogen 14mg / L Escherichia coli Group Value Reciprocal 10 -2 .

[0036] project

[0037] Except for Escherichia coli, all other units are mg / L

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Abstract

The present invention relates to a treatment method for cleaning percolate of refuse-burying yard, which includes the following steps: firstly, adding lime and air-blowing aeration, making lime and organic matter be formed into insoluble calcium salt, and making lime and heavy metal ion be formed into heavy metal hydroxide and be precipitated, converting NH4(+) into NH3 and discharging it into water body, then adding FeSo4 and H2O2 to form Fe(OH)3 and CaSO4 sediment to make the finally-discharged watste water be reached to the discharge standard.

Description

technical field [0001] The invention belongs to the field of purification treatment method of landfill leachate. Background technique [0002] With the increase of urban population, domestic garbage also increases sharply, and garbage disposal has become an urgent problem to be solved. At present, most cities use methods such as sanitary landfill with relatively mature technology and low treatment cost, high-temperature composting and landfill after screening for domestic waste. A certain amount of leachate is produced, which contains a large amount of humic acid, fumaric acid and NH produced by protein decomposition. 4 + , waste batteries and other heavy metals, the concentration of ammonia nitrogen is high, the composition is complex, and the nutritional ratio of microorganisms is out of balance. Not only is it extremely black and smelly, but its pollution concentration is 10-100 times that of ordinary urban sewage, directly causing serious da...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/58C02F1/66
Inventor 龚琦冼萍韦小玲
Owner GUANGXI UNIV