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Method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge

A floc sludge, autotrophic denitrification technology, applied in the direction of water/sludge/sewage treatment, biological water/sewage treatment, sludge treatment, etc., can solve the problem that the short-range nitrification process is difficult to realize stably, and reach the discharge volume less, to avoid the inhibitory effect

Active Publication Date: 2015-04-22
BEIJING UNIV OF TECH
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Problems solved by technology

However, the current bottleneck restricting the denitrification of urban sewage by anammox is that the short-cut nitrification process that provides substrate nitrite for anammox is difficult to achieve stably.

Method used

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  • Method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and embodiment the present invention will be further described: as figure 1As shown, the symbiotic floc sludge and granular sludge realize the urban sewage autotrophic denitrification device is equipped with urban sewage raw water tank (1), high-load activated sludge reactor (2), secondary settling tank (3), intermediate water tank (4), autotrophic denitrification reactor (5), sludge treatment reactor (6); urban sewage raw water tank (1) is provided with overflow pipe (1.1) and vent pipe (1.2); urban sewage raw water tank (1) Connect the water inlet pipe of the high-load activated sludge reactor (2) through the water inlet pump (2.1); the high-load activated sludge reactor (2) is divided into several compartments, and flow holes are arranged staggered up and down according to the direction of water flow Each cell is connected, equipped with aeration head (2.3), air compressor (2.7), gas flow meter (2.6) and gas volume regul...

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Abstract

The invention discloses a method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge. The city sewage firstly goes into a high-load activated sludge reactor, organic compounds in the sewage are adsorbed to activated sludge, then effluent goes into a flocculent sludge and granular sludge symbiosis autotrophic nitrogen removal reactor through a middle water tank, and synchronous shortcut nitrification anaerobic ammonia oxidation autotrophic nitrogen removal is realized; the autotrophic nitrogen removal reactor allows the mixed sludge to be screened into the granular sludge and the flocculent sludge through arranging a cyclone separator; the sludge age of the flocculent sludge is controlled through daily regular emissions of the flocculent sludge; the flocculent sludge is treated regularly by nitrite, so that increase of nitrite oxidizing bacteria in the flocculent sludge is controlled, and the system stable shortcut nitrification is maintained; through the above measures, the stable shortcut nitrification anaerobic ammonia oxidation autotrophic nitrogen removal of the city sewage is achieved, and the purposes of energy saving and consumption reduction are reached.

Description

technical field [0001] The invention relates to a method for realizing autotrophic denitrification of urban sewage through symbiosis of floc sludge and granular sludge, and belongs to the technical field of sewage biological treatment. Background technique [0002] Anammox autotrophic denitrification technology has been successfully applied to more than 100 high-ammonia-nitrogen sewage treatment projects worldwide, realizing energy saving and consumption reduction of sewage biological denitrification. In recent years, scientists and engineers from all over the world have agreed that if anaerobic ammonium oxidation technology can be applied to urban sewage treatment plants, it is expected to transform urban sewage treatment plants from large energy-consuming enterprises to energy self-sufficient or energy-external enterprises. This is because, on the one hand, the oxygen consumption of urban sewage anammox autotrophic denitrification process is reduced, so the energy consumed...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/00C02F11/04
CPCC02F3/12C02F3/301C02F3/302C02F3/307C02F9/00C02F11/04C02F2301/08C02F2303/06
Inventor 马斌彭永臻委燕
Owner BEIJING UNIV OF TECH
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