Constant water level sequencing batch type activated sludge treatment sewage system with characteristic of multi-stage A-O reinforced denitrogenation and phosphorus removing, and method thereof

A technology for denitrification and phosphorus removal and activated sludge, which is applied in the field of sewage treatment to achieve high denitrification efficiency, fully utilize carbon sources, and take into account the effects of phosphorus removal.

Active Publication Date: 2012-10-17
THUNIP CORP LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the process of operation, it is found that if the effluent has high requirements for nitrogen and phosphorus removal, the treatment effect of constant water level SBR process for nitrogen and phosphorus removal is not very satisfactory, and the ability of nitrogen and phosphorus removal still needs to be strengthened

Method used

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  • Constant water level sequencing batch type activated sludge treatment sewage system with characteristic of multi-stage A-O reinforced denitrogenation and phosphorus removing, and method thereof
  • Constant water level sequencing batch type activated sludge treatment sewage system with characteristic of multi-stage A-O reinforced denitrogenation and phosphorus removing, and method thereof

Examples

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Embodiment 1

[0051] Example 1: Multi-stage A-O enhanced denitrification and dephosphorization constant water level sequence batch activated sludge treatment sewage system

[0052] Such as figure 2 As shown, the multi-stage A-O enhanced denitrification and dephosphorization constant water level sequence batch activated sludge treatment sewage system includes: anaerobic grid 2, multi-stage anoxic-aerobic grid (1 is anoxic grid, 14 is good oxygen grid) and facultative grid 13; the first system reaction grid is anaerobic grid 2, and anaerobic grid 2 is connected to the multi-stage anoxic-aerobic grid, and then connected to facultative grid 13, in which the anaerobic grid After the oxygen grid 2 is the hypoxic grid 1 in the first-level anoxic-aerobic grid; the first aerobic grid 15 and the second aerobic grid 16 are respectively connected with the first sequence grid 5 and the second sequence grid 7 pass; anaerobic grid 2, multi-stage anoxic-aerobic grid and facultative oxygen grid 13 form a ...

Embodiment 2

[0053] Example 2: Multi-stage A-O enhanced denitrification and dephosphorization constant water level sequence batch activated sludge treatment method for sewage

[0054] When the series of multi-stage hypoxia-aerobic grids is two-level, there are first-level hypoxic-aerobic grids and second-level hypoxic-aerobic grids, including the following steps:

[0055] 1) First, part of the sewage (30%) enters the anaerobic grid, and mixes them with the return sludge from the first sequence batch, so that the phosphorus accumulating bacteria in it absorb the volatile acid produced by the hydrolysis and acidification of the sewage and release phosphorus; the return flow The volume ratio of the amount of sludge to the total influent of the system, namely the reflux ratio, is 1.5:1.

[0056] 2) Put part of the sewage (20%) into the anoxic grid in the first-level anoxic-aerobic grid, mix it with the sewage treated in step 1) in the anoxic grid, and remove the pollutants brought in the anaer...

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Abstract

The present invention relates to a constant water level sequencing batch type activated sludge treatment sewage system with a characteristic of multi-level A-O reinforced denitrogenation and phosphorus removing, and a method thereof. The system sequentially comprises an anaerobic cell, multiple stage anoxia-aerobic cells, and a facultative cell, wherein the rear of the facultative cell is dividedinto two branches, one branch is the first sequencing batch cell communicated with the first aerobic cell, and the other branch is the second sequencing batch cell communicated with the second aerobic cell. With the system of the present invention, the constant water level sequencing batch type activated sludge treatment sewage method is improved so as to enhance effects of denitrogenation and phosphorus removing.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a multi-stage A-O enhanced denitrification and dephosphorization constant water level sequence batch activated sludge treatment sewage system and a method thereof. Background technique [0002] At present, the requirements for nitrogen and phosphorus removal in urban sewage treatment systems are increasing day by day, so many sewage treatment processes that strengthen nitrogen and phosphorus removal have emerged as the times require. [0003] Puhua Holdings Co., Ltd. applied for a patent in 2006 about a method and system for treating sewage with constant water level sequence batch activated sludge (patent application number: CN200610165570.1), hereinafter referred to as the constant water level SBR process. [0004] Constant water level SBR process, that is, continuous water inlet, continuous water outlet, constant water level improved SBR process, this process improves ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 周丽颖李星文袁琳李子言
Owner THUNIP CORP LTD
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