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Nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes

A technology of biological reaction tank and multi-mode operation, applied in the field of integrated biological reaction tank for denitrification and phosphorus removal, can solve the problems of restricting the development of the sewage treatment industry, single operation mode, etc., to eliminate adverse effects, flexible and convenient switching, and the number of equipment less effect

Active Publication Date: 2015-12-02
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional biological reactors are either operated in the positive AAO (anaerobic-anoxic-aerobic) mode or the inverted AAO (anoxic-anaerobic-aerobic) mode, or in an alternate mode, such as SBR, UNITANK, etc. The process and operation mode are relatively simple. When the influent water quality changes greatly and the stability of the effluent water is required to be high, the above processes limit the development of the sewage treatment industry to a certain extent.

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  • Nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes
  • Nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes
  • Nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes

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Embodiment Construction

[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] like figure 1 As shown, the multi-mode denitrification and phosphorus removal integrated biological reaction pool provided by the present invention includes a biological selection zone 22, a pre-anoxic zone 23, a main reaction zone 24, a water distribution zone 25, a water outlet zone 26 and an internal return channel 27 .

[0029]The biological reaction tank is provided with a biological selection area 22 and a pre-anoxic area 23 in the front section. The water enters the biological selection area 22 from the water inlet pipe 1; the external return sludge enters the external return sludge channel 17 from the external return sludge pipe 3, and the external return sludge channel 17 is connected to the biological selection area 22 and extends to the pre-anoxic area 23. Set at least two regulating weir gates or flow and direction regul...

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Abstract

The invention discloses a nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes. The biological reaction tank comprises a biological selection zone, a pre-anoxic zone, a main reaction zone, a water distribution zone, a water outlet zone and an internal reflux channel, wherein the main reaction zone comprises a zone A, a zone B and a zone C; the zone A can serve as an anaerobic zone or an anoxic zone during operation; the zone B and the zone C can serve as aerobic zones and can also serve as anaerobic zones or anoxic zones during operation; the biological selection zone is arranged on the forepart of the reaction tank; the pre-anoxic zone is arranged behind the biological selection zone; the water distribution zone is arranged among the zone A, the zone B and the zone C; and the water outlet zone is arranged between the zone B and the zone C and is connected with the water distribution zone by the internal reflux channel. The nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes, which is provided by the invention, has the advantages that the biological reaction tank has the characteristics of intensification, small floor area and small quantity of equipment and can alternately operate in multiple modes; and the modes are switched freely and flexibly, so that impact load resistance is ensured and efficient biological nitrogen and phosphorus removal can be achieved under the condition that the inflow water quality changes more substantially.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to an integrated biological reaction tank capable of multi-mode denitrification and dephosphorization. Background technique [0002] In recent years, sewage treatment has entered the stage of advanced treatment that requires efficient removal of organic matter and efficient nitrogen and phosphorus removal. Efficient biological nitrogen and phosphorus removal technology has become a research hotspot in the field of sewage treatment. When the influent water quality changes greatly, It is more important to ensure efficient biological nitrogen and phosphorus removal. At present, conventional bioreactors either operate in the positive AAO (anaerobic-anoxic-aerobic) mode or the inverted AAO (anoxic-anaerobic-aerobic) mode, or operate in an alternate mode, such as SBR, UNITANK, etc. The process and operation mode are relatively simple. When the influent water quality changes greatly and the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 张欣董磊
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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