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Technology for treating garbage leachate

A landfill leachate and treatment process technology, which is applied in the field of leachate treatment process, can solve the problems of decreased biodegradability, increased leachate salt content, leachate salt enrichment, etc., to reduce floor space and increase efficiency , the effect of easy installation

Inactive Publication Date: 2010-12-29
杭州深瑞环境有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2. The problem of poor biodegradability of leachate
[0012] 3. The problem of leachate salt enrichment
[0013] There are many ways to treat landfill leachate. The best effluent quality is the reverse osmosis method, but it has concentrated water back to the landfill plant, resulting in the accumulation of salt in the landfill plant for many years.
In some garbage plants in the north, due to the low annual rainfall, the salt concentration of the landfill leachate is high, and the recharged concentrated water increases the salt content of the leachate again, and also causes the problem of its biochemical decline.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In the process of treating high-concentration domestic waste leachate in a certain city, the leachate adjustment pool adjusts the water volume, water quality, and water temperature to buffer the leachate, and the water temperature is controlled at about 35 degrees; Denitrification treatment is carried out on the raw liquid, and the leachate after denitrification treatment automatically flows into the nitrification tank from the bottom of the denitrification tank, and an air aerator is used to aerate the treatment liquid to increase the dissolved oxygen in the water, and the activated sludge will For its aerobic treatment, the ammonia nitrogen is nitrified by nitrifying bacteria; the treatment liquid after biochemical treatment is pumped into the tubular ultrafiltration membrane treatment device with a molecular weight cut-off of 50,000 Daltons by the water transfer pump. One way is to return the circulating liquid to the inlet of the circulating pump, so that the muddy w...

Embodiment 2

[0040] According to the same operation steps of embodiment 1: the yield of adjusting the nitrification tank equipment is 20%, the sludge concentration is brought up to 13% in the circulation process, and the increase of the oxygen in the air aeration aqueous solution is increased to 7mg / L, and the COD of the influent is by 10200mg / L is degraded to 498mg / L, and ammonia nitrogen is reduced from 162mg / L to 64mg / L; in addition, the molecular weight cut-off of the ultrafiltration membrane is 60,000 Daltons, and the operating pressure is 0.06Mpa; the operating pressure of the roll nanofiltration membrane is 1.2Mpa, and the recovery The rate is 66%; the operating pressure of the roll-type reverse osmosis membrane device is 2.1Mpa, and the recovery rate is 75%; the operating pressure of the electrodialysis device is controlled at 0.1MPa, the operating voltage is 50V, and the current is 50A.

[0041] After the above implementation process, the pollution indicators are as follows:

[0...

Embodiment 3

[0045] According to the same operating procedure of embodiment 1: the yield of adjusting the nitrification tank equipment is 18%, and the sludge concentration is brought up to 13% in the circulation process, and the increase to 8mg / L of joining air aeration aqueous solution oxygen, in addition, the ultrafiltration membrane The molecular weight cut-off is 80,000 Daltons, and the operating pressure is 0.08Mpa; the operating pressure of the roll-type nanofiltration membrane is 2.2Mpa, and the recovery rate is 80%; the operating pressure of the roll-type reverse osmosis membrane device is 2.2Mpa, and the recovery rate is 75%; The operating pressure of the dialysis unit is controlled at 0.1MPa, the operating voltage is 70V, and the current is 50A.

[0046] After the above implementation process, the pollution indicators are as follows:

[0047] project

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PUM

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Abstract

The invention relates to technology for urban environmental hygiene treatment, in particular to technology for treating leachate of municipal refuse landfills and garbage burning plants. The technology comprises the following steps of: nitrifying garbage leachate, and performing polymeric membrane treatment which comprises treatment of an ultrafiltration membrane, a nanofiltration membrane and a reverse osmosis membrane, and selecting a specific operating environment in each step; performing electroosmosis treatment on the treated concentrated water; and finally, performing distillation and other treatment on the concentrated feed liquid subjected to electroosmosis, and exhausting waste materials in the garbage leachate for purification. The technology for treating the garbage leachate has the advantages of complete treatment of wastewater, relative economy, convenient installation, high efficiency, no secondary pollution and the like, and can be widely applied to treating household garbage, industrial production garbage and the like.

Description

technical field [0001] The invention relates to a process for urban environmental sanitation treatment, in particular to a leachate treatment process for urban waste landfill plants and waste incineration plants. technical background [0002] With the increase of my country's urban population, the expansion of city scale and the improvement of residents' living standards, the output of urban domestic waste in my country is increasing sharply. By 1999, the annual output of domestic waste in my country had reached 140 million tons, and it was increasing at an annual rate of 8% to 10%. The per capita daily waste production had exceeded 1kg, approaching the level of industrially developed countries. [0003] According to the principles of harmless, volume reduction, and recycling of waste in my country, a large number of domestic waste sanitary landfills will be newly built. Whether the landfill leachate is treated up to the standard discharge is one of the important indicators...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/44C02F1/469C02F1/04
Inventor 伍立波沈静华胡明峰
Owner 杭州深瑞环境有限公司
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