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Device and method for realizing deep denitrification and excess sludge reduction in late landfill leachate

A landfill leachate and deep denitrification technology, which is applied in the field of biological denitrification of landfill leachate at a low carbon-to-nitrogen ratio, can solve the problems of increasing sewage treatment costs and the inability to improve the denitrification efficiency of late leachate, so as to avoid NOB growth, The effect of less emission and avoiding energy waste

Active Publication Date: 2019-03-19
BEIJING UNIV OF TECH
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Problems solved by technology

However, for late-stage landfill leachate, the severe lack of organic carbon sources is the barrier that cannot improve the denitrification efficiency of late-stage landfill leachate. The traditional biological denitrificat

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  • Device and method for realizing deep denitrification and excess sludge reduction in late landfill leachate

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] like figure 1 As shown, a late-stage landfill leachate deep denitrification and simultaneous excess sludge reduction technology is characterized in that it includes a raw water tank (1), a short-range nitrification reactor (2), an intermediate water tank (3), and a sludge storage tank (4), a fermentation coupled denitrification reactor (5), and an outlet water tank (6).

[0028] The raw water tank is provided with an overflow pipe (1.1) and a water outlet (1.2); the short-path nitrification reactor (2) is provided with an air compressor (2.1), a gas flow meter (2.2), an aeration sand head (2.10), The first water inlet (2.3), the first sampling port (2.8), the first water outlet (2.9), the first vent pipe (2.6), the first agitator (2.5), the first water inlet peristaltic pump (2.11) , the first water outlet peristaltic pump (2...

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Abstract

The invention discloses a device and a method for realizing advanced nitrogen removal of late landfill leachate and excess sludge reduction. The method comprises the steps of firstly putting the latelandfill leachate into a short-range nitrification reactor and controlling the aeration time in real time through a pH (potential of Hydrogen) curve in the aeration stage to completely convert influent ammonia nitrogen into nitrite nitrogen; and putting the nitrite nitrogen-containing effluent and the excess sludge into a fermentation coupling denitrification reactor and cracking a part of microorganisms in the excess sludge, wherein the released organic matters can serve as denitrifying electron donors to reduce the nitrite nitrogen produced in the short-range nitrification process to nitrogen. Compared with a traditional biological nitrogen removal process, the biological denitrification process without an external carbon source, disclosed by the invention, has the advantages that the aeration rate is saved by 25% and the carbon source is saved by 100%; the sludge reduction effect is completed at the same time; the process is flexible and easy to control; and the process is suitablefor the advanced nitrogen removal of high ammonia nitrogen wastewater.

Description

technical field [0001] The invention relates to a technology for realizing deep denitrification of late-stage landfill leachate and reduction of excess sludge, and belongs to the technical field of biological denitrification of late-stage landfill leachate with low carbon-to-nitrogen ratio. Background technique [0002] In recent years, with the increasing output of municipal solid waste, landfilling has gradually become the most widely used treatment and disposal method in the world. If the landfill leachate is not taken effective measures to control, it will seriously pollute the surface water or ground water. Landfill leachate has water quality characteristics such as complex composition, large changes in water quality and quantity, high concentration of organic matter and ammonia nitrogen, and imbalance of microbial nutrient elements, making its treatment one of the unsolved problems in the international scope. Traditional sewage biological denitrification converts NH t...

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Application Information

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IPC IPC(8): C02F3/28C02F11/04C02F103/06
CPCC02F3/28C02F11/04C02F2303/06C02F2103/06
Inventor 彭永臻张方斋王众姜浩
Owner BEIJING UNIV OF TECH
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