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Method and installation for treating wastewater containing ammonia

A technology of equipment and process, which is applied in the field of process and equipment for treating ammonium-containing wastewater, and can solve problems such as performance degradation of autotrophic denitrification equipment

Active Publication Date: 2014-10-22
CYKLAR STULZ ABWASSERTECHN
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  • Abstract
  • Description
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Problems solved by technology

[0019] Coverage of Planctomycetes particles due to diffusion limitation leads to a drastic drop in performance of fully autotrophic denitrification equipment

Method used

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  • Method and installation for treating wastewater containing ammonia
  • Method and installation for treating wastewater containing ammonia
  • Method and installation for treating wastewater containing ammonia

Examples

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Embodiment Construction

[0052] figure 1A whole autotrophic denitrification device 1 for treating ammonium-containing wastewater 2 is shown. The plant 1 can be configured as an SBR plant (sequencing batch reactor), or as a conventional activation plant with secondary purification or as a so-called membrane plant with a membrane for holding biomass. The plant 1 has at least one activation tank 3 in which the waste water 2 is mixed with suspended biomass or activated sludge and in intimate contact.

[0053] Activated sludge consisting of a sludge-water mixture is supplied from the activation tank 3 to the hydrocyclone 5 by means of the pump 4 (direction arrow 6 ). The hydrocyclone 5 has a cylindrical section 7 and a conical section 8 . The cylindrical section 7 has a diameter between 50 mm and 250 mm. The hydrocyclone 5 is filled by the pump 4 with a delivery pressure which, depending on the diameter of the cylindrical section 7 of the hydrocyclone 5 , is between 1.1 bar and 2.1 bar. Via a feeder 9 ...

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Abstract

A method and installation for treating wastewater containing ammonia includes feeding activated sludge from an aeration tank into a hydrocyclone. The sludge is separated into a specifically heavy fraction containing mostly anaerobic ammonia-oxidizing bacteria (anammox) and a specifically light fraction containing mostly aerobic oxidizing bacteria (AOB), which are returned to the aeration tank. The hydrocyclone includes a roughened inner wall surface for at least partially removing an organic or inorganic cover layer disposed on the anaerobic ammonium-oxidizing bacteria (anammox).

Description

technical field [0001] The present invention relates to a process for the treatment of ammonium-containing wastewater in a fully autotrophic denitrification plant with at least one activation tank, in which first nitrite is formed by reacting ammonium with aerobic oxidizing bacteria (AOB) and then by anaerobic Ammonium oxidizing bacteria (anaerobic ammonium oxidation), in particular Planctomycetes, react with ammonium and nitrite to form elemental nitrogen, where the sludge from the activation tank is supplied to the hydrocyclone where it is separated into light fractions and the heavy fraction mainly containing anaerobic ammonium oxidizing bacteria (anaerobic ammonium oxidation), where the heavy fraction is returned to the activation tank. [0002] In addition, the present invention relates to a full-scale autotrophic denitrification device for treating ammonium-containing wastewater, which has at least one activation tank and at least one hydrocyclone, and the hydrocyclone i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/307C02F3/1221C02F1/385Y02W10/10C02F1/58C02F3/30C02F3/34
Inventor 不公告发明人
Owner CYKLAR STULZ ABWASSERTECHN
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