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Coupling type biological denitrification method and system thereof

A biological denitrification and coupled technology, applied in the field of sewage treatment, can solve the problems of low utilization rate of equipment and pool capacity, unstable denitrification and phosphorus removal effect, and failure to meet discharge requirements, etc., to achieve short hydraulic retention time, denitrification Remarkable effect, the effect of improving oxygen utilization rate

Active Publication Date: 2013-07-03
SHANGHAI HONESS ENVIRONMENTAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The disadvantage is that when the concentration of COD and ammonia nitrogen in the influent is very high, the MSBR process cannot meet the emission requirements
[0012] Disadvantages are: sludge return and nitrifying liquid return pump room, secondary settling tank and other structures need to be set up, occupying a large area, high civil construction investment, inconvenient operation and management, and high power consumption
[0022] The disadvantages are: the SBR process is suitable for small and medium-scale sewage treatment plants, not large-scale sewage plants, and the utilization rate of equipment and pool capacity is low, the denitrification and phosphorus removal effect is unstable, and the water head loss is also large

Method used

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  • Coupling type biological denitrification method and system thereof
  • Coupling type biological denitrification method and system thereof
  • Coupling type biological denitrification method and system thereof

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Embodiment 1

[0058] image 3 It is a flow chart of the steps of the coupled biological denitrification method. This embodiment also proposes a coupled biological denitrification method that has a good denitrification effect and is suitable for the degradation of high ammonia nitrogen and high COD wastewater. Such as image 3 As shown, perform the following steps in sequence:

[0059] Step S1: The sewage enters the anoxic tank at the front end, and mixes with the return sludge from the first SBR tank and the second SBR tank, and the mixed solution from the aerobic tank to carry out denitrification reaction. Exemplarily, a submersible mixer is built in the anoxic tank at the front end for stirring.

[0060] Step S2: The effluent from the front-end anoxic pool enters the aerobic pool, and the aeration device and enzyme floating packing are installed in the aerobic pool, and the organic matter is removed by aeration and the nitrification reaction is realized through the enzyme floating pack...

Embodiment 2

[0075] Figure 4 It is a schematic diagram of the process flow of the coupled biological denitrification system, Figure 5 It is a schematic diagram of the structural arrangement of the coupled biological denitrification system. Such as Figure 4 with Figure 5 As shown, a coupled biological denitrification system in this embodiment includes a pre-anoxic pool 1, an aerobic pool 2, a rear anoxic pool 3, a first SBR pool 4 and a second SBR pool 5, and the aerobic pool Pool 2, the first SBR pool 4 and the second SBR pool 5 are all equipped with enzyme floating filler 6, the front anoxic pool 1 is connected to the aerobic pool 2, the aerobic pool 2 is connected to the rear anoxic pool 3, and the rear anoxic pool Oxygen pool 3 communicates with the first SBR pool 4 and the second SBR pool 5 respectively; Also between the aerobic pool 2 and the pre-anoxic pool 2, there is a device for transferring the mixed solution in the aerobic pool 2 to the pre-anoxic pool. The mixed solutio...

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Abstract

The invention discloses a coupling type biological denitrification method which comprises the following steps: enabling sewage to enter a front-end anoxic pool, mixing with returned sludge and mixed liquid and carrying out denitrification reaction; entering an aerobic pool, removing an organic matter through aeration, realizing the nitration reaction and synchronizing the nitration reaction and the denitrification reaction; entering a rear anoxic pool and carrying out denitrification reaction again; and alternately entering a first SBR (Sequencing Batch Reactor) pool and a second SBR pool, treating a surplus carbon source generated in the denitrification or deeply nitrating and simultaneously carrying out sludge return. The invention also provides a coupling type biological denitrification system. The coupling type biological denitrification method and the coupling type biological denitrification system have the beneficial effects that pre-denitrification plus aerobic denitrification and CODcr degrading plus post-denitrification plus sequencing batch aerobic reaction are adopted to overcome the influence of an excessive denitrification carbon source on outlet water, the nitrogen removal efficiency is greatly improved, the nitrogen removal effect is remarkable, and the coupling type biological denitrification system is suitable for degrading high ammonia nitrogen and high COD (Chemical Oxygen Demand) wastewater and particularly has an remarkable effect on coal chemical industry wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a coupled biological denitrification method and a system thereof. Background technique [0002] In recent years, the coal chemical industry and bio-fermentation industries that discharge high-ammonia-nitrogen-containing wastewater have developed rapidly in my country. At the same time, with the acceleration of urbanization, a large amount of domestic sewage also needs to be collected and treated. In order to minimize the pollution of sewage to the water environment, the country has introduced stricter ammonia nitrogen and total nitrogen discharge standards. [0003] At present, the multi-stage AO process, SBR process, and MBR technology for denitrification process are all based on the activated sludge method, and some small and medium-sized projects use the contact oxidation process based on the fixed biofilm method. However, the above-mentioned technical routes general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 王文标张艳王浩肖霄张显忠毛勇先
Owner SHANGHAI HONESS ENVIRONMENTAL TECH CORP
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