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Device and method for deep denitrification and synchronous sludge reduction of secondary effluent of sewage treatment plant

A sewage treatment plant, secondary effluent technology, applied in the adjustment method of biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the difficult and stable acquisition of nitrite and limit anaerobic ammonium oxidation Wide application of technology and other issues, to achieve the effect of easy operation and regulation, short sludge adaptation period, and reduced floor space

Pending Publication Date: 2021-10-01
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the wide application of the anammox process is limited due to the difficulty in obtaining the stable substrate nitrite.

Method used

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  • Device and method for deep denitrification and synchronous sludge reduction of secondary effluent of sewage treatment plant
  • Device and method for deep denitrification and synchronous sludge reduction of secondary effluent of sewage treatment plant
  • Device and method for deep denitrification and synchronous sludge reduction of secondary effluent of sewage treatment plant

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] like figure 1 As shown, a sewage treatment plant secondary effluent deep denitrification device for synchronous sludge reduction, including: sludge storage tank (1), nitrate waste water tank (2), sludge fermentation coupling short-range denitrification reactor (3 ), intermediate water tank (4), anaerobic ammonium oxidation UASB reactor (5), sedimentation tank (6); sludge storage tank (1) is coupled with sludge fermentation short-range denitrification reactor through sludge dosing device (3.1) The mud inlet (3.2) of (3) is connected, and the nitrate waste water tank (2) is connected with the first water inlet (3.4) of the sludge fermentation coupled short-range denitrification reactor (3) through the first water inlet pump (3.3); The sludge fermentation coupling short-range denitrification reactor (3) is connected to the interm...

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Abstract

The invention discloses a device and a method for deep denitrification and synchronous sludge reduction of secondary effluent of a sewage treatment plant, and belongs to the field of biological treatment of sewage and sludge. The device comprises a sludge fermentation coupling short-cut denitrification reactor and an anaerobic ammonia oxidation reactor. The short-cut denitrifying bacteria reduce nitrate in secondary effluent of a sewage treatment plant into nitrite by using short-chain fatty acid generated by hydrolysis and fermentation of excess sludge. Meanwhile, part of ammonia nitrogen is released by sludge fermentation, enters an anaerobic ammonium oxidation reactor along with effluent containing nitrite and is synchronously removed under the action of anaerobic ammonium oxidation bacteria. The secondary effluent is deeply treated by using the residual sludge fermentation coupling short-cut denitrification tandem autotrophic nitrogen removal process, the sludge reduction is realized, an external carbon source and aeration are not needed, the operation energy consumption is reduced. The method has important economic and environmental benefits.

Description

technical field [0001] The invention relates to a device and method for synchronous sludge reduction in the secondary effluent deep denitrification of a sewage treatment plant, belonging to the field of biological treatment of sewage sludge, and is a device and method for realizing the harmless reduction of excess sludge and the removal of total nitrogen at the same time method. Background technique [0002] At present, my country's urban sewage treatment plants mainly adopt the traditional anoxic and aerobic (A / O) biological denitrification process. Due to the lack of organic carbon sources in raw water, COD / NO 3 - The mass concentration is relatively low, and the effluent generally contains a relatively high concentration of nitrate, and its direct discharge will cause eutrophication of the water body. And with the country's increasingly stringent requirements for water environment quality, most sewage treatment plants are facing standard upgrades and require tertiary tr...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/28C02F3/30C02F11/04
CPCC02F3/305C02F3/307C02F3/2846C02F3/286C02F3/006C02F11/04C02F2303/06C02F2209/06C02F2209/08C02F2209/22
Inventor 彭永臻张静雯杜睿李翔晨张琼
Owner BEIJING UNIV OF TECH
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