High nitrogen-containing landfill leachate processing method and apparatus

A technology of high-nitrogen garbage and treatment device, which is applied in the field of biological sewage treatment, can solve the problems of difficult biological treatment of high-ammonia-nitrogen landfill leachate, etc., and achieves the effects of good denitrification and phosphorus removal, improved removal efficiency, and high load.

Active Publication Date: 2009-05-06
CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for treating municipal solid waste leachate, to solve the technical problem that high ammonia nitrogen landfill leachate is difficult to treat biologically; and to solve the problems of deep denitrification and deep removal of organic matter in high-concentration organic wastewater

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  • High nitrogen-containing landfill leachate processing method and apparatus
  • High nitrogen-containing landfill leachate processing method and apparatus
  • High nitrogen-containing landfill leachate processing method and apparatus

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Embodiment Construction

[0036] See figure 1 , The specific process of the present invention for the treatment of landfill leachate is:

[0037] The leachate flows from the original leachate zone 1 through the UASB1 leachate feed pump 4 and the refluxed SBR nitrification supernatant into the UASB1 reactor B. The denitrifying bacteria and anaerobic methanogens in the reactor make full use of the abundant influent water The organic matter undergoes anoxic denitrification and anaerobic methane production reaction, so that the organic matter is fully degraded. The effluent of the UASB1 reactor B enters the UASB2 reactor C from the bottom through the UASB2 water inlet pump 18, and the remaining organic matter in the UASB1 reactor C effluent is further removed by the anaerobic action of methanogens. The effluent water of UASB2 reactor C flows to the intermediate water tank 28 by gravity. After the two-stage UASB treatment, the leachate enters the SBR reactor D. First, through the aerobic respiration of heterot...

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Abstract

The invention relates to a high nitrogen landfill leachate treatment method and a device thereof, belonging to the technical field of biological treatment of wastewater. The existing treatment technology can not remove the ammonia and the organic matters of landfill leachate simultaneously and deeply. Taking actual landfill leachate as a target, the invention uses a two-level UASB-SBR chemical and biological system for processing and obtains better effect. By the way of the return of the nitrification liquid in a SBR reactor, not only a certain degree of dilution function is carried out on raw water, but also the nitrification liquid containing rich NO3<->-N can conduct denitrification with the help of rich organic carbon sources in the raw water. Most of organic matters in the landfill leachate are removed in a UASB1 reactor; and the removal rate of COD can reach 92.1 percent; and the biggest organic load is 13kgCOD / m <3> question mark d. The UASB1 reactor and the SBR reactor achieve further removal of the organic matters. In the SBR reactor, by the nitrification function, almost 100 percent of NH4<+>-N is converted into NO3<->-N. As pH, ORP, and DO are used as the control parameters in the biological nitrogen removal process of a SBR system, energy consumption brought by the over-aeration and over-stirring can be effectively prevented, and the operating cost is saved.

Description

Technical field [0001] The invention relates to a sewage biological treatment method and device. Background technique [0002] With the acceleration of my country's urbanization process, the number of cities and towns continues to increase, the scale of cities is increasing, and the population grows rapidly, which directly leads to a substantial increase in urban solid waste (municipal solid waste). Landfill as a method of municipal solid waste treatment has been widely adopted at home and abroad. At present, about 90% of the municipal solid waste in my country is treated by landfill. In the process of municipal waste (MSW) landfill, due to compaction and microbial decomposition, the pollutants contained in the waste will dissolve with water and form landfill leachate together with rainfall and runoff. As a by-product in the waste treatment process, leachate has seriously affected the healthy development of my country's waste treatment industry. At present, the annual output of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 彭永臻孙洪伟时晓宁王希宁
Owner CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
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