Two-stage short-cut nitrification and anaerobic ammonia oxidation coupled endogenous denitrification deep denitrification device and method thereof

A technology of anaerobic ammonium oxidation and endogenous denitrification, which is applied in the field of deep denitrification devices with two-stage short-range nitrification and anaerobic ammonium oxidation coupled with endogenous denitrification, can solve the problems of competition, poor stability, and rise, and achieve Improve the stability of denitrification, easy to popularize and apply, and simple process

Pending Publication Date: 2020-09-15
ZHEJIANG UNIV OF TECH
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  • Claims
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Problems solved by technology

[0004] However, up to now, the stability of short-cut nitrification of urban sewage under low temperature conditions is still not guaranteed, and the excessive proliferation of nitrite oxidizing bacteria (NOB) may easily lead to NO in short-cut nitrification system. 3 － can not provide suitable for the growth and metabolism of Anammox bacteria Substrate concentration ratio (theoretical value is 1.32), thus affecting the denitrification efficiency of PN/A process
In addition, the presence of

Method used

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  • Two-stage short-cut nitrification and anaerobic ammonia oxidation coupled endogenous denitrification deep denitrification device and method thereof
  • Two-stage short-cut nitrification and anaerobic ammonia oxidation coupled endogenous denitrification deep denitrification device and method thereof
  • Two-stage short-cut nitrification and anaerobic ammonia oxidation coupled endogenous denitrification deep denitrification device and method thereof

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Example Embodiment

[0035] Example 1:

[0036] Such as figure 1 As shown, the two-stage short-range nitrification and anaerobic ammonia oxidation coupled endogenous denitrification deep denitrification device provided by this embodiment includes a raw water tank 1, a PN (short-range nitrification) reactor 2, an intermediate water tank 3, and SAED (anaerobic ammonia oxidation). Oxyammonium oxidation coupled endogenous denitrification) reactor 4.

[0037] Among them, the raw water tank 1 stores urban sewage raw water, and the PN reactor 2 is connected to the raw water tank 1 through the PN inlet pump 2.1 to obtain the urban sewage raw water in the raw water tank 1. The PN reactor 2 uses the PN outlet valve 2.13 and the middle The water tank 3 is connected and used to inject the short-range nitrification liquid obtained after the two-stage short-range nitrification treatment into the intermediate water tank 3.

[0038] It should be noted that the inlet and outlet water of the raw water tank 1 and the inl...

Example Embodiment

[0048] Example 2:

[0049] This embodiment provides a two-stage short-cut nitrification and anaerobic ammonia oxidation coupled endogenous denitrification method for deep denitrification, and the method is completed based on the device described in any of the above embodiments.

[0050] Specifically, the two-stage short-cut nitrification and anaerobic ammonia oxidation coupled endogenous denitrification deep denitrification method of this embodiment includes the following steps:

[0051] 1) Inoculation start-up stage: inoculate short-cut nitrification sludge in PN reactor 2, the sludge concentration is controlled at 3000~4000mg / L, and the raw water of urban sewage is added for aerobic aeration. It runs in a sequential batch mode and has good real-time detection. The dissolved oxygen DO concentration in the PN reactor 2 in the oxygen stage. When the dissolved oxygen DO concentration curve has a sudden jump, stop the aeration, control the dissolved oxygen DO concentration to 0.5~1.0mg / ...

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Abstract

The invention discloses a two-stage short-cut nitrification and anaerobic ammonia oxidation coupled endogenous denitrification deep denitrification device and a method thereof. The device comprises araw water tank, a PN reactor, an intermediate water tank and an SAED reactor, urban sewage raw water is stored in the raw water tank, the PN reactor is connected with the raw water tank through a PN water inlet pump, the PN reactor is connected with the middle water tank through a PN water outlet valve; the municipal sewage raw water in the raw water tank is further connected to the SAED reactor through a SAED water inlet pump, the SAED reactor is connected with the middle water tank through the short-cut nitrification liquid inlet pump, and the municipal sewage raw water and short-cut nitrification liquid in the SAED reactor are subjected to deep denitrification and then discharged through a water outlet valve of the SAED reactor. The anaerobic ammonia oxidation coupling endogenous denitrification is taken as a main denitrification way, and the method has the advantages of no need of adding an external carbon source, economy, high efficiency, stable operation and the like, and is suitable for the technical fields of construction of small and medium-sized urban sewage treatment plants, upgrading and reconstruction of constructed projects and the like.

Description

technical field [0001] The application belongs to the technical field of sewage biological treatment, and specifically relates to a deep denitrification device and method of two-stage short-cut nitrification (PN) and anaerobic ammonium oxidation coupling endogenous denitrification (SAED). Background technique [0002] Anammox (Anammox) technology is a new type of efficient, economical and energy-saving biological denitrification technology with good application prospects and commercial value. The biochemical reaction equation of Anammox bacteria is shown in formula (1-1). Compared with the traditional biological nitrogen removal process, the short-cut nitrification-anammox (PN / A) biological nitrogen removal technology can save 100% of the organic carbon source consumption, save 62.5% of the aeration rate, and reduce the sludge production by 90% , so it is considered to be the most promising biological denitrification technology. [0003] [0004] However, up to now, the...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/34C02F101/16
CPCC02F3/307C02F3/303C02F3/34C02F3/305C02F3/308C02F2101/16C02F2209/06C02F2209/22C02F2209/02
Inventor 刘文龙李军邹金特吴淑云何明伟
Owner ZHEJIANG UNIV OF TECH
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