Method for processing urban sewage nitrifying liquid by sludge fermentation and denitrification coupled with anaerobic ammonia oxidation

A technology for anaerobic ammonia oxidation and nitrification of anaerobic ammonia is applied in the field of biochemical wastewater treatment, which can solve problems such as insufficient carbon source, and achieve the effects of convenient operation, simple control and low total nitrogen concentration in effluent.

Active Publication Date: 2013-05-29
SDIC XINKAI WATER ENVIRONMENT INVESTMENT CO LTD
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Problems solved by technology

[0006] The invention successfully solves the problem of insufficient carbon source in the traditional nitrification and denitrification process. In a single reactor, the short-chain fatty acid produced by the primary sludge in the hydrolysis and acidification process is used to convert NO 3 - -N reverts to NO 2 - -N and N 2 , and synchronously remove the ammonia nitrogen produced in the hydrolytic acidification process through the anaerobic ammonium oxidation reaction, and at the same time complete the initial reduction of the primary sludge

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  • Method for processing urban sewage nitrifying liquid by sludge fermentation and denitrification coupled with anaerobic ammonia oxidation

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Embodiment Construction

[0029] The present invention will be further described in conjunction with accompanying drawing and example: as figure 1 As shown, the sludge fermentation and denitrification coupled anammox sludge reduction device is equipped with sludge fermentation and denitrification coupled anammox main reactor 5, nitrification liquid inlet tank 1, sludge storage tank 2, drainage Pond 3 and mud discharge pond 4; Raw water pool 1 links to each other with the water inlet of main reactor 5 by inlet pump 19, mud storage tank 2 links to each other with the mud inlet of main reactor 5 by inlet pump 20, the main reactor 5 The drain port is connected to the drain tank 3 through a valve 17 , and the mud discharge port of the main reactor 5 is connected to the mud discharge tank 4 through a valve 18 .

[0030] The main reactor 5 adopts a closed structure, and is provided with a water sealing device 21 and a stirring device 9. The top cover above the reactor is provided with a gas collection port 22...

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Abstract

The invention discloses a method for processing urban sewage nitrifying liquid by sludge fermentation and denitrification coupled with anaerobic ammonia oxidation, and belongs to the technical field of sewage treatment by a biochemical process. Efficient removal of total nitrogen wastewater in the same space is achieved by combined action of hydrolytic acidate bacteria, denitrifying bacteria and anaerobic ammonium oxidation bacteria. The method concretely comprises the steps of restoring NO3-N into NO2-N and N2 by short-chain fatty acid produced by primarily participated sludge in a hydrolysis acidification process in a single reactor; and removing NO2-N accumulated in the denitrification process and ammonia nitrogen released in the hydrolysis acidification process by anaerobic ammonia oxidation reaction. Thus, the total nitrogen concentration of the outlet water is greatly reduced; and minimization of the primarily participated sludge is finished at the same time. Thus, the technology is suitable for deep treatment of nitrifying water of urban sewage.

Description

technical field [0001] The invention relates to a method for treating low-carbon-to-nitrogen ratio urban domestic sewage nitrification effluent by using primary sludge hydrolysis acidification to produce carbon sources to strengthen denitrification and anaerobic ammonium oxidation technology, and belongs to the technical field of biochemical sewage treatment. Through the joint action of hydrolytic acidification bacteria, denitrification bacteria and anammox bacteria, the efficient removal of total nitrogen in wastewater can be realized in the same space. Specifically, in a single reactor, the short-chain fatty acids produced during the hydrolysis and acidification of primary sludge are used to convert NO 3 - -N reverts to NO 2 - -N and N 2 , and through the anaerobic ammonium oxidation reaction, the NO accumulated in the denitrification process 2 - -N and the ammonia nitrogen released during hydrolytic acidification are removed. As a result, the concentration of total n...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 王淑莹操沈彬吴程程杜睿彭永臻
Owner SDIC XINKAI WATER ENVIRONMENT INVESTMENT CO LTD
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