Method and device for treating early urban landfill leachate

A technology of municipal waste and treatment method, applied in the field of biochemical sewage biological treatment, can solve the problems of high treatment cost and increased operating cost, and achieve the effects of small sludge output, simple operation and improved efficiency

Active Publication Date: 2012-06-13
BEIJING UNIV OF TECH
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Problems solved by technology

Some previous studies believed that the high concentration of ammonia nitrogen and heavy metal ions in urban landfill leachate would inhibit the normal metabolism of microorganisms. At the same time, biological denitri

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  • Method and device for treating early urban landfill leachate
  • Method and device for treating early urban landfill leachate
  • Method and device for treating early urban landfill leachate

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] refer to figure 1 Shown is a schematic flow chart of an early municipal garbage permeate treatment method, which specifically includes:

[0022] Step 101, adding anaerobic sludge to the ASBR reactor, adding aerobic active and denitrifying sludge to the pulsed SBR reactor, performing sludge acclimatization and cultivation, and keeping the MLVSS of the pulsed SBR above 6000 mg / L;

[0023] Step 102, add the original leachate into the water inlet tank, start the ASBR water inlet pump, the original leachate enters the ASBR through the ASBR water inlet instantaneously, and when the incoming amount is half of the effective volume of the ASBR, turn on the mechanical stirring device in the ASBR, and react a cycle process when When the COD of ASBR effluent is maintained at 1100±100mg / L, stop the stirring device for mud-water separation;...

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Abstract

The invention provides a method and a device for treating early urban landfill leachate, which belongs to the technical field of biological sewage treatment by using a biochemical method. Under the conditions that only a biological method is utilized to treat the leachate and no external carbon source is added, operating cost is greatly reduced, and more than 80% of chemical oxygen demand (COD) removal rate and more than 95% of total nitrogen removal rate are achieved. An anaerobic sequencing batch reactor (ASBR) thoroughly performs anaerobic methanogenic reaction to remove high-concentrationorganic matter in the early urban landfill leachate, and effluent of the ASBR serves as feed water of a pulse sequencing batch reactor (SBR) by adding appropriate proportion of original leachate and provides appropriate ratio of COD to NH4+-N. The pulse SBR adopts three times of the feed water equal in quantity, combines a method for controlling stirring and aeration in real time and fully utilizes at least two-thirds of organic carbon sources in the pulse SBR feed water for denitrification, and total nitrogen is removed efficiently through utilization of internal carbon sources under the condition of no external carbon sources. By means of the technology, contradiction formed by organic matter anaerobic degradation and biological denitrification is solved, running is flexible, and operation is simple.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment by biochemical method, in particular to a treatment method and device for early urban garbage permeate. Background technique [0002] In 2009, there were 654 cities in my country with a population of 350 million. The volume of urban waste removal and transportation was 167 million tons, and the average annual growth rate of domestic waste was 3%. Waste disposal facilities have also changed significantly. In 2009, my country's total waste disposal volume was 119 million tons, of which landfill accounted for 80%, incineration 20%, and composting 2%. It can be seen from the above that landfill is the main way of urban waste disposal. Landfill is suitable for my country's national conditions and is an effective and low-cost urban waste disposal method, but landfill will produce a large amount of landfill leachate. The water quality of landfill leachate is more complex than that o...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30
Inventor 王淑莹朱如龙彭永臻王凯
Owner BEIJING UNIV OF TECH
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