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A kind of water preservation and activity recovery method based on mbbr autotrophic denitrification suspension carrier

A suspension carrier, autotrophic denitrification technology, applied in chemical instruments and methods, water treatment parameter control, biological water/sewage treatment, etc., can solve problems such as providing guidance for difficult engineering projects, poor activity recovery effect, and complicated preservation methods , to achieve the effect of ensuring retention without degradation, reducing workload, and simple preservation method

Active Publication Date: 2022-04-05
QINGDAO SPRING WATER TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the storage method, the current research is mostly focused on the reactor in the form of granular sludge, and the focus is mostly on the storage temperature, substrate concentration and storage time. The common problem is that the storage method is complicated and the activity recovery effect is poor.
The research uses a reactor with an effective volume of 0.1L, which is difficult to provide guidance for engineering projects. In addition, the research is carried out with water distribution, which lacks data support for the complex water quality in actual engineering projects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The autotrophic denitrification project of a sewage treatment plant mainly deals with sludge digestion liquid, and the design water volume is 300m 3 / d, influent COD, BOD5, NH 3 , TN design values ​​are 420, 200, 440, 480mg / L respectively, using MBBR-based autotrophic denitrification suspension carrier for treatment, the suspension carrier filling rate is 40%, and the total nitrogen removal volume load can reach 1.3kgN / (m 3 d), the system effluent ammonia nitrogen can be reduced to about 30mg / L, TN is about 60mg / L, the treatment effect is stable, and the volume load of TN removal reaches 1.2kgN / (m 3 d). At some point, the suspension carrier needs to be preserved.

[0057] The preservation method of suspension carrier, its specific steps are:

[0058] Set the temperature of the reactor containing the MBBR-based autotrophic denitrification suspension carrier to 25°C;

[0059] The reactor SBR is running, adjust the aeration rate of the reactor to maintain the dissolved...

Embodiment 2

[0070] The process parameters are set as follows:

[0071] A pilot plant, the water quality of the treatment is mainly pharmaceutical wastewater, the design water volume is 300m 3 / d, influent COD, BOD 5 , NH 3 , TN design values ​​are 1300, 500, 1600, 1750mg / L respectively, using MBBR-based autotrophic denitrification suspension carrier for treatment, the suspension carrier filling rate is 45%, and the total nitrogen removal volume load can reach 1.3kgN / (m 3 · d), the system effluent ammonia nitrogen can be reduced to about 50mg / L, TN is about 190mg / L, the treatment effect is stable, and the volume load of TN removal reaches 1.1kgN / (m 3 d). During a certain period of time, the water output of the project decreases, and the reactor does not have enough water to react. During this period, the suspended carrier in the reactor is preserved.

[0072] The preservation method of the suspension carrier specifically comprises the following steps:

[0073] Set the temperature of t...

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Abstract

The invention discloses a water-containing storage and activity recovery method based on MBBR autotrophic denitrification suspension carrier, belonging to the technical field of sewage biological denitrification. It solves the technical problems in the prior art such as complex preservation environment, slow recovery of activity and poor treatment effect. The storage method includes: setting the reactor temperature to 20-25°C, operating the reactor SBR, adjusting the aeration rate of the reactor, when the ammonia nitrogen in the reactor drops below 50mg / L, then replenishing the ammonia nitrogen in the reactor, and when the reactor nitrates When the nitrogen accumulation exceeds 200mg / L or the reactor temperature is greater than 25°C, the reactor water is completely changed. And the activity recovery method after preservation is provided as follows: the reactor resumes continuous flow operation, and adjusts the influent flow and aeration, and then slowly increases the influent flow and aeration to the normal operating level. The invention can successfully preserve the autotrophic denitrification suspension carrier for a long time, and recovers the activity quickly, and can fully recover the treatment effect of the reactor.

Description

technical field [0001] The invention relates to the technical field of biological denitrification of sewage, in particular to a method for water-containing storage and activity recovery based on MBBR autotrophic denitrification suspension carriers. Background technique [0002] The traditional nitrification and denitrification denitrification process requires a large amount of aeration, carbon source addition and energy consumption, but the discovery of anammox provides a new metabolic pathway for the denitrification process, and the autotrophic denitrification process based on the anammox process It is considered to be one of the most promising denitrification processes. This process combines short-cut nitrification with anaerobic ammonium oxidation. Compared with traditional nitrification and denitrification, it saves 60% of aeration and does not need to add organic carbon sources. 90% reduction in sludge production and relatively less release of nitrogen oxides. The MBBR...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/30
CPCC02F3/34C02F3/307C02F3/301C02F2203/004C02F2209/02C02F2209/22C02F2209/14C02F2209/16C02F2305/06
Inventor 周家中吴迪韩文杰管勇杰
Owner QINGDAO SPRING WATER TREATMENT
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