Method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment

An aerobic granular sludge, anaerobic and aerobic technology, applied in water/sludge/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. High cost and other issues, to achieve the effect of broadening the scope of application, improving the optimization of utilization, and increasing the nitrification rate

Inactive Publication Date: 2012-04-18
FUDAN UNIV
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Problems solved by technology

However, the addition of additional carbon sources makes the system operation cumbersome, high operating costs, and greatly reduces the technical and economic applicability
However, the method of synchronous nitrification and denitrification using the aerobic and anaerobic zones inside the aerobic granular sludge can save the addition of additional carbon sources, but the low dissolved oxygen leads to low nitrification reaction rate and poor system stability.
In addition, the difficulty of controlling the particle size and density of granular sludge also greatly affects the popularization and use of this method.

Method used

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  • Method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment
  • Method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment
  • Method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment

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Embodiment 1

[0031] Treatment of carbon and nitrogen (COD∶NH 4 + -N) Synthetic waste water with a ratio of 10.

[0032] Adopt the aerobic granular sludge high-efficiency denitrification method of the present invention to carry out wastewater treatment, and the whole operation period is 6 hours; wherein, the three-stage anaerobic stage is set to 30 minutes respectively; the first and second stage aerobic stages are respectively set to 60 minutes; the low oxygen stage (low dissolved oxygen stage) is set to 143 minutes, the precipitation stage is set to 2 minutes, and the drainage stage is set to 5 minutes.

[0033] After adopting the aerobic particle denitrification treatment, the nitrogen removal efficiency is 93%; wherein, the average particle diameter of the particles is 1.5 mm.

Embodiment 2

[0035] Treatment of carbon and nitrogen (COD∶NH 4 + -N) ratio of 5 synthetic waste water.

[0036] The aerobic granular sludge high-efficiency denitrification method of the present invention is used for wastewater treatment, and the entire operation period is 6 hours; wherein, the three anaerobic stages are respectively set to 30 minutes; the first and second aerobic stages are respectively set to 70 minutes and 50 minutes; the low oxygen stage (low dissolved oxygen stage) is set to 143 minutes, the precipitation stage is set to 2 minutes, and the drainage stage is set to 5 minutes.

[0037] After being treated by the denitrification system, the nitrogen removal efficiency is 96%; wherein, the average particle diameter of the particles is 1.3 mm.

[0038] The typical nitrogen removal situation in the operation cycle in this example is as follows figure 2 As shown, the nitrogen removal conditions during the medium and long-term operation period are as follows image 3 show...

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Abstract

The invention belongs to the technical field of biological treatment of wastewater, and relates to a method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment. In the method for efficiently denitriding aerobic granular sludge, the reaction process is designed into multiple stages on the basis of a sequencing batch reactor, and an anaerobic-aerobic or low-oxygen alternate running mode is adopted at every stage; a water feeding mode for feeding water according to different proportions at multiple sections is designed according to the quality of fed water, and a water feeding point is set at the early anaerobic stage or the entire anaerobic stage of every stage in the reaction process. The method for efficiently denitriding aerobic granular sludge disclosed by the invention has the advantages of high denitriding efficiency, stable granular sludge performance and no need of adding any running cost, and is widely applied in the field of wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and relates to an aerobic granular sludge denitrification treatment method, in particular to a good combination of step-by-step water inflow and alternating anaerobic and aerobic treatment with simple structure, low cost and high treatment efficiency. Efficient denitrification method of oxygen granular sludge. Background technique [0002] Biological denitrification in the prior art is usually achieved through nitrification and denitrification processes. Under aerobic conditions, nitrifying bacteria oxidize ammonia nitrogen into nitrite and nitrate (nitrification process); under anoxic conditions, denitrifying bacteria reduce nitrite and nitrate to nitrogen (denitrification process), thus realizing Detoxification of nitrogen in wastewater. [0003] Granular sludge is an efficient biological treatment method developed in the past ten years. Compared with the traditional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 郑俊华刘永强陈芳媛宁平
Owner FUDAN UNIV
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