Outer circulation anaerobic reaction system and outer circulation anaerobic reaction method for landfill leachate
A landfill leachate and anaerobic reaction technology, which is applied in the field of landfill leachate external circulation anaerobic reaction systems, can solve the problems of difficulty in adjusting the temperature of the reactor, large fluctuations, etc. Effect
Active Publication Date: 2015-01-07
HUAXIN CEMENT +2
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On the other hand, the leachate heated by the heater directly enters the anaerobic reactor, which will cause the temperature in the reactor to be difficult to adjust and fluctuate greatly
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[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0023] like figure 1 As shown, the landfill leachate external circulation anaerobic reaction system of the present invention includes a pretreatment tank 1, a screw pump 2, a heater 3, an anaerobic reactor 7, a nitrification / denitrification system 4, a circulating water pool 5 and COD on-line monitoring equipment8.
[0024] The pretreatment tank 1, the screw pump 2 and the heater 3 are connected in sequence. The main function of the pretreatment tank 1 is to settle, adjust the pH of the filtrate, and pre-aerate to remove H 2 S and other substances. The screw pump 2 sends the filtrate in the pretreatment tank 1 to the heater 3 .
[0025] The circulating pool 5 is provided with a first pipeline 601, a second pipeline ...
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The invention relates to an outer circulation anaerobic reaction system and an outer circulation anaerobic reaction method for landfill leachate. The system comprises a pretreatment pond, a screw pump, a heater, an anaerobic reactor, a nitration / denitrification system, a circulation water pond and COD (Chemical Oxygen Demand) online monitoring equipment for detecting the COD concentration of the leachate in the circulation water pond. The method comprises the following steps: S1, assembling the reaction system; S2, opening a first control valve and a fourth control valve, conveying the leachate through the screw pump to the heater for heating, guiding the leachate to flow into the circulation water pond through a first pipeline,and then flow into the anaerobic reactor through a fourth pipeline, and after a period of time, closing the first control valve; the leachate flows repeatedly between the circulation water pond and the anaerobic reactor until the COD concentration detected by the COD online monitoring equipment is reduced to a set value; S3, opening a third control valve, and guiding the leachate in the circulation water pond to enter the nitration / denitrification system. According to the outer circulation anaerobic reaction system and the outer circulation anaerobic reaction method, repeated circulation anaerobic reactions are realized, and the anaerobic digestion efficiency of the landfill leachate is obviously improved.
Description
technical field [0001] The invention relates to the field of garbage treatment, in particular to an anaerobic reaction system and method for external circulation of garbage leachate. Background technique [0002] Generally, the anaerobic digestion reaction process of municipal landfill leachate is: pretreatment—heating—anaerobic reaction—subsequent process (such as nitrification / denitrification system). The leachate heated by the heater will directly enter the anaerobic reactor, and the filtrate after anaerobic treatment will directly flow into the subsequent process. When the content of organic pollutants in the leachate is extremely high, after an anaerobic reaction of the system, the content of organic matter in the effluent quality is still difficult to reduce to the ideal level, and the concentration of COD is still high. On the other hand, the leachate heated by the heater directly enters the anaerobic reactor, which will cause the temperature in the reactor to be dif...
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IPC IPC(8): C02F9/14C02F3/28
CPCC02F1/02C02F3/28C02F9/00
Inventor 李叶青刘喆王焕忠缪文娟
Owner HUAXIN CEMENT