Multi-level biological nitrogen and phosphorus removal sewage treatment method and device

A sewage treatment method and sewage treatment device technology, applied in the field of biological denitrification and phosphorus removal sewage treatment, can solve the negative impact of the environment in the research stage and other problems, and achieve the effect of improving filtration efficiency

Inactive Publication Date: 2010-11-17
CORSTAR ENVIRONMENTAL EQUIP SHANGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The Japanese research team focused on chemical phosphorus removal, and used chemical agents to replace the existing technology of phosphorus-accumulating bacteria biological phosph

Method used

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  • Multi-level biological nitrogen and phosphorus removal sewage treatment method and device
  • Multi-level biological nitrogen and phosphorus removal sewage treatment method and device
  • Multi-level biological nitrogen and phosphorus removal sewage treatment method and device

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Embodiment Construction

[0028] Next, the detailed implementation of a multi-stage biological denitrification and dephosphorization sewage treatment method and device according to the present invention will be described in detail with reference to the accompanying drawings.

[0029] attached figure 2 Shown is a schematic structural view of the device described in this specific embodiment. The shown device comprises: an anaerobic tank 110, a plurality of deficient-aerobic combination tanks 130 formed by an anoxic tank 131 and an aerobic tank group 132, a settling tank 150, a return sludge thickening tank 170 and A pre-anoxic pool 190, a plurality of anoxic-aerobic combined pools 130 connected end to end to form a multi-stage anoxic-aerobic treatment unit 140, and a return pipeline 133 from the first-stage aerobic pool to the same-level anoxic pool .

[0030] In this specific embodiment, the four-stage anaerobic-aerobic combination unit 140 composed of four sets of anoxic-aerobic combination pools 13...

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Abstract

The invention discloses a multi-level biological nitrogen and phosphorus removal sewage treatment method. The method comprises the following steps of: introducing sewage into an anaerobic pond; introducing the sewage treated in the anaerobic pond into an anoxic pond at the front section of an anoxic-aerobic treatment unit; draining all sewage into a settling pond through an aerobic pond of the last level; draining the settled sludge into a returned sludge concentration pond; draining supernatant in the returned sludge concentration pond into the aerobic pond of the last level; and draining the sludge in the returned sludge concentration pond into the initial anaerobic pond through a pre-anoxic pond for circular treatment. The invention also provides a corresponding treatment device. The method and the device have the advantages of only adding the returned sludge concentration pond and the pre-anoxic pond compared with the A2O process in the prior art and improving the reaction efficiency by adjusting the connection relationship among the reaction ponds.

Description

【Technical field】 [0001] The invention relates to the technical field of environmental protection, in particular to a multi-stage biological denitrification and dephosphorization sewage treatment method and device. 【Background technique】 [0002] A2O is the English abbreviation of "Anaerobic-Anoxic-Oxic". . The schematic diagram of the device is attached figure 1 As shown, the sewage enters the anaerobic pool 1, the anoxic pool 2 and the aerobic pool 3 in turn, and finally is discharged through the reflux pool 4, and the reflux pool 4 re-passes the sludge in the lower part of the sewage into the anaerobic pool 1 through the external return pipe 5 for further processing. For circulation treatment, an internal return pipe 6 is also set between the aerobic pool 3 and the anoxic pool 2 . [0003] In the device, BOD5, SS and nitrogen and phosphorus in various forms will be removed one by one. In the activated sludge of the A2O biological nitrogen and phosphorus removal system...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F3/308
Inventor 杨企星
Owner CORSTAR ENVIRONMENTAL EQUIP SHANGHAI
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