Autotrophic denitrifying nitrogen-removal reaction device, denitrification system and denitrification method of denitrification system

Abstract

The invention discloses an autotrophic denitrifying nitrogen-removal reaction device. The autotrophic denitrifying nitrogen-removal reaction device comprises a housing, and an oxygen limited nitrosoation reaction region, a heterotrophic denitrification gas-producing region and an upflow autotrophic denitrification region all arranged in the housing; a liquid inlet and a liquid outlet are formed in the housing, and the liquid inlet is communicated with the oxygen limited nitrosoation reaction region; the liquid outlet is communicated with the upflow autotrophic denitrification region; the oxygen limited nitrosoation reaction region is arranged in the central region of the upper half part of the housing; the heterotrophic denitrification gas-producing region is arranged in a region under the oxygen limited nitrosoation reaction region and communicated with the oxygen limited nitrosoation reaction region; the upflow autotrophic denitrification region surrounds the oxygen limited nitrosoation reaction region and the bottom of the upflow autotrophic denitrification region is communicated with the heterotrophic denitrification gas-producing region. The invention also discloses a denitrification system and a denitrification method thereof. The autotrophic denitrifying nitrogen-removal reaction device, the denitrification system and the denitrification method of the denitrification system have the characteristics of high efficiency, large load and convenient operation, and also are low in operation cost, free of addition of lots of extra carbon source and prone to realize automatic control, and thus have practical application value for up-to-standard treatment and efficient low-consumption operation of high-nitrogen low-carbon wastewater.

Description

technical field [0001] The invention belongs to the field of sewage treatment devices and their use, and in particular relates to an autotrophic denitrification denitrification reaction device, a denitrification system and a denitrification method thereof. Background technique [0002] The traditional biological denitrification theory proposes that organic nitrogen in sewage is converted into NH by heterotrophic microorganisms 4 + -N, which is then converted to nitrate nitrogen NO by autotrophic nitrifying bacteria 2 - -N and NO 3 - -N, nitrate nitrogen is reduced and transformed into nitrogen gas by denitrifying bacteria under anoxic conditions, so as to achieve the purpose of denitrification of sewage. Sufficient carbon source is the key to the smooth denitrification process and efficient denitrification. When the carbon-nitrogen ratio (C / N ratio) in the wastewater is lower than 3.4, it is necessary to add an external carbon source to ensure a better biological denit...

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Problems solved by technology

[0004] The invention overcomes the defects in the prior art that high amount of additional carbon source required for high carbon and nitrogen, high processing cost, and inability to achieve ideal biological denitrification effect in a low carbon-nitrogen ratio environment, etc., and proposes an autotrophic denitrification denitrification Nitrogen reaction device, nitrogen removal system and method for nitrogen removal

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