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Method for cultivating gas self-circulation enhanced short-distance denitrification granular sludge

A nitrifying particle, self-circulating technology, applied in chemical instruments and methods, water/sludge/sewage treatment, anaerobic digestion treatment, etc. Effective fluidization and other issues to avoid channeling and dead zone phenomena, conducive to popularization and application, and easy to achieve.

Active Publication Date: 2015-06-03
TSINGHUA UNIV +1
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Problems solved by technology

But in practice, because only a small amount of gas is generated in the short-range denitrification process, the sludge in the USB reactor cannot be effectively fluidized, and channeling and dead zones often occur, thereby greatly reducing the capacity of the reactor. operating efficiency and nitrite nitrogen production

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  • Method for cultivating gas self-circulation enhanced short-distance denitrification granular sludge
  • Method for cultivating gas self-circulation enhanced short-distance denitrification granular sludge

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Embodiment Construction

[0017] The present invention will be further described in conjunction with accompanying drawing and embodiment: as figure 1 As shown, a gas self-circulation short-range denitrification granular sludge cultivation method uses the following device, which includes a water inlet tank 1, a carbon source storage tank 2, a tee 3, a USB reactor 4 and a water outlet tank 5; The water tank 1 is connected to one end of the tee 3 through the first peristaltic pump 1.1; the carbon source storage tank 2 is connected to the other end of the tee 3 through the second peristaltic pump 2.1; After confluence, enter the first water inlet 4.1 at the bottom of the USB reactor 4; the USB reactor is provided with a mud discharge port 4.3, a water distribution tray 4.4, a sampling port 4.5, a three-phase separator 4.6, an overflow weir 4.7 and a water outlet 4.8; The water outlet 4.8 is connected to the water outlet tank 5; the water distribution tray 4.4 is provided with a circular hole with a diamete...

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Abstract

The invention discloses a method for cultivating gas self-circulation enhanced short-distance denitrification granular sludge, belonging to the technical field of biological sewage treatment. According to the method, an exhaust port is formed in the top of a three-phase separator of a closed USB reactor and is connected with a water inlet at the bottom of the USB reactor by virtue of a peristaltic pump, and self-circulation of gases in the USB reactor is realized at a certain rotating speed. According to the method, channeling and dead zone occurring in the USB reactor can be avoided, and the problem that the traditional denitrification granular sludge floats upwards in the USB reactor can be effectively solved. According to the method disclosed by the invention, the enhanced cultivation of the short-distance denitrification granular sludge can be realized, nitrite is produced in the denitrification process, and a stable electron acceptor is provided for an anaerobic ammonia oxidation process. The method provided by the invention is simple in operation and easy to realize and contributes to popularization and application of the short-distance denitrification process and anaerobic ammonia oxidation denitrification technology.

Description

technical field [0001] The invention relates to a method for gas self-circulation enhanced short-range denitrification granular sludge cultivation, which belongs to the technical field of sewage biological treatment. Background technique [0002] Anaerobic ammonium oxidation refers to the biological process that anaerobic ammonium oxidation bacteria use carbon dioxide as a carbon source, nitrite nitrogen as an electron acceptor, and ammonia nitrogen as an electron donor to convert nitrite nitrogen and ammonia nitrogen into nitrogen under anaerobic conditions. process. Anaerobic ammonia oxidation biological denitrification technology belongs to autotrophic denitrification technology. Compared with traditional denitrification denitrification technology, no carbon source is required, no oxygen supply is required, and the output of residual sludge is small, and the volumetric nitrogen removal efficiency is high, thereby greatly reducing sewage. Energy consumption and costs duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCC02F3/2846C02F3/2893
Inventor 李力杜睿操沈彬张为堂左剑恶
Owner TSINGHUA UNIV
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