Treatment method of garbage leachate

A technology of landfill leachate and a treatment method, applied in the field of landfill leachate treatment, can solve the problems of low biochemical degradation performance, difficult treatment, environmental and ecological pollution, etc., and achieve sludge reduction, resource utilization, and saving. The effect of investment and operating costs

CN104787982AActive Publication Date: 2015-07-22JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-07-22

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Abstract

The invention discloses a treatment method of garbage leachate. The treatment method comprises the following steps: leachate in a garbage regulation pool is introduced into a leachate equalization pool; one part of effluent in the leachate equalization pool flows through an anaerobic pool to degrade organic pollutants, then enters a primary nitrification pool and a secondary nitrification pool in sequence to degrade organic pollutants and nitrify ammonia, and then enter an ultrafiltration system to obtain an ultrafiltration concentrated solution; the ultrafiltration concentrated solution flows back to the primary nitrification pool; ultrafiltration freshwater enters an ultrafiltration clear liquid tank, is introduced into an electrodialysis system to concentrate inorganic salt, and then enters a reverse osmosis system; a reverse osmosis concentrate flows back to the anaerobic pool to further degrade organic pollutants, and the reverse osmosis freshwater is discharged in compliance with the standards; meanwhile, the other part of the effluent in the leachate equalization pool is fully mixed with sludge generated by the ultrafiltration system and concentrated solution generated by the electrodialysis system in a mixing and homogenizing pool, and then enters a supercritical water oxidation system; the effluent is discharged in compliance with the standards; the generated concentrated solution is subjected to resource utilization after centrifugal dewatering. The treatment method treats a waste with another waste, and realizes the reduction and recycling of sludge.
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Description

technical field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method suitable for landfill leachate. Background technique

[0002] With the rapid development of economy and society, the output of garbage produced by human production and life has already constituted a serious threat to our country's environmental conditions. According to relevant data, the total amount of garbage in our country is currently growing rapidly at a rate of 10% per year, and the untreated garbage has reached 7 billion tons. How to dispose of such a large amount of garbage has become one of the urgent problems to be solved in the 21st century in our country . At present, garbage sanitary landfill is still the main way of garbage disposal in my country, and its treatment volume accounts for about 80% of the total garbage. During the process of landfilling and stacking of garbage, various metabolites are produced due to anaerobic fermentat...

Examples

Embodiment 1

[0024] A method for treating landfill leachate, comprising introducing leachate from a landfill adjustment tank into a leachate balance tank; adjusting the pH value of the leachate to 6.5 in the leachate balance tank, and adjusting the pH value with lye, the lye being hydrogen oxidized Sodium solution or lime water.

[0025] Part of the effluent I of the leachate equalization tank degrades organic pollutants through the anaerobic tank, ammonifies organic nitrogen, and then enters the first-level nitrification tank and the second-level nitrification tank in turn to degrade organic pollutants and carry out ammonia nitrification, and then enters The ultrafiltration system, the ultrafiltration concentrated solution is returned to the first-stage nitrification tank, the ultrafiltered fresh water enters the ultrafiltration liquid tank, and then introduced into the electrodialysis system, after the inorganic salt is concentrated, the fresh water enters the reverse osmosis system, and ...

Embodiment 2

[0034] A method for treating landfill leachate, comprising introducing leachate from a landfill adjustment tank into a leachate balance tank; adjusting the pH value of the leachate to 7 in the leachate balance tank, and adjusting the pH value with lye, the lye being hydrogen oxidized Sodium solution or lime water.

[0035] Part of the effluent I of the leachate equalization tank degrades organic pollutants through the anaerobic tank, ammonifies organic nitrogen, and then enters the first-level nitrification tank and the second-level nitrification tank in turn to degrade organic pollutants and carry out ammonia nitrification, and then enters The ultrafiltration system, the ultrafiltration concentrated solution is returned to the first-stage nitrification tank, the ultrafiltered fresh water enters the ultrafiltration liquid tank, and then introduced into the electrodialysis system, after the inorganic salt is concentrated, the fresh water enters the reverse osmosis system, and th...