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A low-concentration ammonia nitrogen sewage treatment device and treatment method

A sewage treatment device, low-concentration ammonia nitrogen technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, water treatment parameter control, etc. Set difficulties and other problems to achieve the effect of saving aeration and commercial carbon sources

Active Publication Date: 2022-03-04
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of low total nitrogen removal rate in the aerobic zone and difficulty in the enrichment of autotrophic anammox bacteria under low-concentration ammonia-nitrogen conditions described in the prior art, the present invention provides a low-concentration ammonia-nitrogen sewage treatment device, providing The low-concentration ammonia nitrogen sewage treatment device is a mainstream continuous flow reactor, which strengthens the TN removal effect in the aerobic zone and increases the contribution rate of autotrophic denitrification, and at the same time enriches ANAMMOX bacteria (anammox bacteria) in the anoxic zone, thereby constructing Economical, stable and efficient new biological denitrification system

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  • A low-concentration ammonia nitrogen sewage treatment device and treatment method
  • A low-concentration ammonia nitrogen sewage treatment device and treatment method
  • A low-concentration ammonia nitrogen sewage treatment device and treatment method

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Effect test

Embodiment 1

[0052] A low-concentration ammonia nitrogen sewage treatment device, such as figure 1 As shown, it includes: water inlet tank 1, reactor 2 and terminal sedimentation tank 3; reactor 2 includes aerobic I zone 21, intermediate sedimentation tank 22, aerobic II zone 23, anoxic I zone 24, anoxic II zone 25.

[0053] The water outlet of the water inlet tank 1 is provided with a water inlet pump 11, and the water inlet of the water inlet pump 11 communicates with the water inlet tank 1, and the water outlet of the water inlet pump 11 communicates with the liquid inlet of the aerobic zone I zone 21.

[0054] The aerobic zone I 21 is provided with a first aeration component 26 . The first aeration part 26 is provided with a time controller 261 for controlling the aeration time.

[0055] The liquid inlet of the intermediate sedimentation tank 22 communicates with the liquid outlet of the aerobic zone I zone 21, and the intermediate sedimentation tank 22 is provided with a first sludg...

Embodiment 2

[0068] This embodiment provides a method for treating low-concentration ammonia-nitrogen sewage, which is carried out by using the low-concentration ammonia-nitrogen sewage treatment device in Embodiment 1, and the specific method is as follows.

[0069] S1. Membrane formation (startup stage): Control the DO in the aerobic zone II to 2-3mg / L and add 50mg / L equivalent NH to the influent 4 Cl solution to increase influent NH 4 + -N concentration, promotes the growth of ANAMMOX biofilm, NO 2 - -N accumulation is obvious, effluent NO 2 - -N / NH 4 + -N is approximately equal to 1. The removal of TN in the aerobic zone Ⅱ accounted for 40% of the whole process, while the total anoxic zone accounted for 30%.

[0070] S2. Treatment of sewage (operating phase):

[0071] After the successful start-up of film hanging, the actual domestic sewage (65-75mg / L) is used as the influent, and the sludge in the terminal sedimentation tank enters the aerobic zone II through the sludge retur...

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Abstract

The invention discloses a low-concentration ammonia nitrogen sewage treatment device and a treatment method. The low-concentration ammonia nitrogen sewage treatment device includes: a water inlet tank, a reactor, and a terminal sedimentation tank; the reactor includes an aerobic zone I and an intermediate sedimentation tank , aerobic zone II, anoxic zone I and anoxic zone II; the ratio of the volume of the aerobic zone II to the sum of the volumes of the anoxic zone I and hypoxia II zone is 15:30-40; the end The sedimentation tank is equipped with a drainage pipe, a sludge return pipe and a second sludge pipe for discharging sludge. The inlet end of the sludge return pipe is connected to the terminal sedimentation tank, and the outlet end is connected to the sludge inlet of the aerobic zone II. connected. The low-concentration ammonia nitrogen sewage treatment device of the present invention not only strengthens the TN removal effect in the aerobic zone and increases the contribution rate of autotrophic denitrification, but also enriches ANAMMOX bacteria in the anoxic zone, thereby constructing an economical, stable and efficient new biological denitrification system . Moreover, the invention can save aeration, save commercial carbon sources, effectively recover energy and save sludge treatment costs.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a low-concentration ammonia nitrogen sewage treatment device and treatment method. Background technique [0002] Compared with physical and chemical methods, biological denitrification technology has the advantages of simple process design, easy operation and maintenance, large sewage treatment capacity, low energy consumption and long equipment replacement cycle. It is a practical process adopted by most municipal sewage treatment plants and has great development. potential. According to the traditional nitrification / denitrification theory, the total nitrogen removal in the existing process mainly occurs in the anoxic zone; while the total nitrogen removal rate in the aerobic zone is low. [0003] The autotrophic denitrification technology based on anammox is currently the most economical and efficient biological denitrification technology. 4 + -N) and nitrite nitrog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34C02F101/16C02F101/30
CPCC02F3/30C02F3/34C02F2101/30C02F2209/16C02F2101/16
Inventor 江进曹节李宁关朝婷许燕滨潘汉平胡颖斌
Owner GUANGDONG UNIV OF TECH
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