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A technology for landfill leachate and a treatment method, applied in the field of landfill leachate treatment, can solve the problems of inability to flexibly adapt to changes in landfill leachate water quality, high treatment cost, low treatment efficiency, etc. The effect of high removal efficiency and low treatment cost
Inactive Publication Date: 2015-04-29
HUNAN UNIV
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Problems solved by technology
[0008] The technical problem to be solved by the present invention is: in order to overcome the defects of high processing cost, low processing efficiency, poor stability and inability to flexibly adapt to the water quality change of landfill leachate in the above-mentioned existing landfill leachate treatment technology, a kind of landfill leachate treatment method is provided, This method has low treatment cost, high removal efficiency of ammonia nitrogen and organic matter, stable effluent quality, strong impact load resistance, and can effectively realize the treatment of landfill leachate
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Embodiment 1
[0029] Embodiment 1: a kind of landfill leachate processing method is characterized in that, comprises the following steps:
[0030] The first step: open the water inlet valve 2, the landfill leachate flows through the adsorption column 1 filled with natural zeolite and boron mud filler, and enters the sequencing batch reactor 11 equipped with a mechanical stirring device 12, and the water inlet flow rate is controlled to 4.8L / min, the delayed water intake time is 0.5h;
[0031] Step 2: After the water inlet is completed, close the water inlet valve 2 of the adsorption column, turn on the air compressor 7, and carry out blast aeration to the landfill leachate in the reactor, the aeration rate is 2.3L / min, and the aeration time is 2.5 hours;
[0032] The third step: turn off the air compressor 7, turn on the mechanical stirring device 12, and perform anoxic stirring on the landfill leachate in the reactor, the stirring rate is 30r / min, and the stirring time is controlled at 1...
Embodiment 2
[0040] Embodiment 2: a kind of landfill leachate processing method adopts the sequence batch reactor 12 that stirring motor 3 and propeller 4 are housed, it is characterized in that, comprises the following steps:
[0041] The first step: open the water inlet valve 2, the landfill leachate flows through the adsorption column 1 filled with boron mud, and enters the sequencing batch reactor 11 equipped with a mechanical stirring device 12, the water inlet flow rate is controlled at 3.4L / min, and the time delay Water intake time is 1.0h;
[0042] Step 2: After the water inlet is completed, close the water inlet valve 2 of the adsorption column, turn on the air compressor 7, and carry out blast aeration to the landfill leachate in the reactor, the aeration rate is 2.4L / min, and the aeration time is 2.0h;
[0043] The third step: turn off the air compressor 7, turn on the mechanical stirring device 12, and perform anoxic stirring on the landfill leachate in the reactor, the stirri...
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Abstract
The invention discloses a refuse leachate treatment method. The refuse leachate is pretreated preliminarily by using an adsorption column filled with fillers of natural zeolite and boron mud so that the concentration of ammonia nitrogen in the refuse leachate is reduced, then the treated refuse leachate is subjected to two-stage aerobic aeration and anoxia stirring by using a water injecting delaying sequencing batch reactor, and finally the treated refuse leachate is treated deeply by using constructed wetland to reach the standard before being discharged. The refuse leachate treatment method disclosed by the invention has the advantages of high removal efficiency of ammonia nitrogen and organic matters, low treatment cost, stable quality of treated refuse leachate and strong impact load resisting capacity. In addition, the generated surplus sludge can be recovered and used as a feed or compost, the harm of the refuse leachate to the human health can be prevented effectively, the problems that the existing refuse leachate treatment process is low in nitrogen removal efficiency, high in treatment cost and poor in stability and can not adapt to the quality change of the refuse leachate flexibly can be solved. The refuse leachate treatment method disclosed by the invention can be widely popularized and applied to the treatment of refuse leachate in the refuse landfill.
Description
technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for treating landfill leachate. Background technique [0002] Landfill leachate is sewage produced under the influence of external factors through complex physical, chemical and biochemical actions during the sanitary landfill process. The concentration of pollutants in landfill leachate is high, the composition is complex, and the pollution lasts for a long time, which has a serious impact on the surrounding environment. How to treat it and discharge it up to the standard is a major problem in the field of environmental protection at home and abroad. [0003] At present, there is no complete treatment process for landfill leachate at home and abroad. Most leachate treatment processes are transformed from other wastewater treatment principles. These processes can be generally divided into biological methods, physical and chemical methods, and land method...
Claims
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