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Method for realizing nitrogen and phosphorus removal by quickly starting SBR (Sequencing Batch Reactor) system

A system implementation and quick start technology, applied in chemical instruments and methods, water treatment parameter control, water/sludge/sewage treatment, etc. Active, enhanced utilization effect

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing technologies regulate the system from the process aspect. Due to the differences between microorganisms, especially the start-up process, it is difficult to achieve rapid start-up by adjusting parameters.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The laboratory builds a set of SBR system, including 3 plexiglass reactors with an effective volume of 5L, the concentration of ammonia nitrogen is 200mg / L, the concentration of total nitrogen is 230mg / L, the concentration of COD is 500mg / L, and the concentration of total phosphorus is 15mg / L L of sewage.

[0032] First, inoculate the remaining activated sludge containing nitrifying bacteria and denitrifying phosphorus-accumulating bacteria in the secondary sedimentation tank of a certain sewage field according to the sludge concentration of 3000mg / L, and set an operating cycle of each reactor as 8h, in which the water is fed at the same time react. A single SBR reactor is carried out according to the first aeration reaction-the first stirring reaction-the second aeration reaction-sedimentation-drainage process. Each operation cycle is to add asparagine at 0.01mg / L in the initial stage of the first aeration reaction, and add rhamnose ester at 0.01mg / L in the first stir...

Embodiment 2

[0046] The reactor and start-up process and conditions are the same as in Example 1, except that in the stirring reaction stage, when the dissolved oxygen is reduced to less than 0.1 mg / L, betaine is added at a concentration of 0.1 mg / L to replace equal-quality phosphorylcholine alkali.

[0047] After the start-up of the SBR system is completed, the ratio of aeration time to stirring time in the last operating cycle is 3:1, when the removal rate of ammonia nitrogen in the influent reaches 94.4%, the removal rate of total nitrogen and total phosphorus reaches 85.1% and 86.2% respectively, start The period is 42 days.

Embodiment 3

[0049] The reactor, start-up process and conditions are the same as in Example 1, except that in the stirring reaction stage, trehalose ester is used to replace rhamnose ester of equal mass, and betaine is used to replace phosphorylcholine of equal mass.

[0050] After the start-up of the SBR system is completed, the ratio of the aeration time to the stirring time in the last operating cycle is 3:1, when the removal rate of ammonia nitrogen in the influent reaches 94.1%, the removal rate of total nitrogen and total phosphorus reaches 84.8% and 85.3% respectively, start The period is 43 days.

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Abstract

The invention discloses a method for realizing nitrogen and phosphorus removal by quickly starting an SBR (sequencing batch reactor) system. The method comprises the following steps: S1, inoculating activated sludge; S2, setting an operation cycle, and adopting an operation mode of gradually increasing the water inlet volume load in the starting process; s3, the nitrogen and phosphorus-containing wastewater to be treated enters an SBR reactor to start, asparagine is added into the wastewater in the aerobic reaction stage, sugar ester substances are added into the wastewater in the anoxic reaction stage, and after dissolved oxygen is reduced to be smaller than 0.1 mg / L, quaternary ammonium base is added; and S4, finishing the SBR system starting process when the water inlet volume load reaches the designed water inlet volume load, the ammonia nitrogen removal rate reaches 90% or above, and the total nitrogen and total phosphorus removal rates reach 85% or above. According to the method, rapid enrichment culture of nitrifying bacteria and denitrifying phosphorus-accumulating bacteria in a short time can be achieved, and then the nitrogen and phosphorus removal function of the SBR system is rapidly started.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and in particular relates to a method for rapidly starting an SBR system to realize nitrogen and phosphorus removal. Background technique [0002] SBR (Sequenced Batch Activated Sludge Process) is a widely used biological nitrogen and phosphorus removal process, which can remove carbon, nitrogen and phosphorus pollutants in sewage in the same reactor, and requires nitrifying bacteria with different functions , denitrifying bacteria and phosphorus accumulating bacteria play their respective roles under different conditions. Among them, nitrifying bacteria belong to aerobic autotrophic microorganisms, which grow slowly and have a long generation time, so it is not easy to cultivate quickly; denitrifying bacteria are mostly heterotrophic facultative bacteria, which convert nitrate and / or nitrite into nitrogen; Phosphorus accumulating bacteria are heterotrophic microorganisms...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/308C02F2203/004C02F2209/08C02F2209/14C02F2209/16C02F2209/22Y02W10/10
Inventor 高会杰王刚陈明翔孙丹凤
Owner CHINA PETROLEUM & CHEM CORP
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