Quick start-up method of integrated autotrophic denitrification system

Abstract

The invention relates to a rapid start method for an integrated autotrophic denitrification system and belongs to the technical field of treatment of sewage with high ammonia nitrogen. An SBR (Sequencing Batch Reactor) is inoculated with short-cut nitrification sludge and anammox sludge according to the mass ratio of (1: 3) to (1: 1), and the concentration of mixed sludge is 3,000mg / L to 4,000mg / L. The dissolved oxygen is controlled to be 0.3mg / L to 0.5mg / L by adopting an intermittent aeration operating mode, and the accumulation amount of nitrite nitrogen at the end of aeration is 20mg / L to 30mg / L; in each cycle, three aeration and hypoxic stages are set at intervals; each cycle has six stages, i.e., water inlet, aeration / hypoxic reaction, stirred degassing, precipitating, water outlet and standing. In a starting process, the concentration of dissolved oxygen is controlled unchanged, the balance of supply and consumption of nitrite nitrogen is maintained through a method of stagewise prolonging aeration stage time and shortening hypoxic stage time, and the rapid increase of denitrification load is achieved. When the initial ammonia nitrogen concentration in the reactor reaches 300mg / L, the balance of supply and consumption of nitrite nitrogen is maintained by means of shortening the hypoxic stage time. According to the method, the starting speed is high, the total-nitrogen removal load is high, and the operation is stable.

Description

technical field

[0001] The invention relates to a quick start-up method of an integrated autotrophic denitrification system, belonging to the technical field of high ammonia nitrogen sewage treatment. technical background

[0002] In 1994, Mulder et al. published an article in the journal Microbiology Ecology saying that they discovered the oxidation reaction of ammonia under anaerobic conditions in a denitrification fluidized bed reactor, and called the process anaerobic ammonium oxidation reaction. Later studies found that the microorganisms involved in this reaction were anammox bacteria, which is a kind of autotrophic bacteria that can use ammonia nitrogen and nitrite nitrogen to generate nitrogen gas, so as to achieve the purpose of sewage denitrification. After the discovery of anammox bacteria, it has attracted great attention from sewage treatment workers. The new denitrification process based on anammox bacteria has become a research hotspot in recent years. Compar...

Examples

Embodiment Construction

[0024] The first step, the establishment of an integrated autotrophic denitrification system

[0025] 1. Inoculate 3.5L of short-range nitrification sludge and 3L of anammox sludge cultivated in this laboratory into an SBR reactor with a total volume of 8L and an effective volume of 7L (see figure 1 ), the sludge concentration in the reactor after inoculation was 3480mgSS / L.

[0026] 2. According to the measured nitrite nitrogen accumulation rate and consumption rate, the operation mode of the SBR reactor is determined as follows: each cycle is: water inflow 20min, reaction 360min (3 aeration / anoxic sections, each aeration time 30min, anoxic time 90min), stirring and degassing for 60min, sedimentation for 30min, effluent for 5min, idle for 5min; 3 cycles per day, each cycle is 8 hours.

technical field

[0001] The invention relates to a quick start-up method of an integrated autotrophic denitrification system, belonging to the technical field of high ammonia nitrogen sewage treatment. technical background

[0002] In 1994, Mulder et al. published an article in the journal Microbiology Ecology saying that they discovered the oxidation reaction of ammonia under anaerobic conditions in a denitrification fluidized bed reactor, and called the process anaerobic ammonium oxidation reaction. Later studies found that the microorganisms involved in this reaction were anammox bacteria, which is a kind of autotrophic bacteria that can use ammonia nitrogen and nitrite nitrogen to generate nitrogen gas, so as to achieve the purpose of sewage denitrification. After the discovery of anammox bacteria, it has attracted great attention from sewage treatment workers. The new denitrification process based on anammox bacteria has become a research hotspot in recent years. Compar...

Examples

Embodiment Construction

[0024] The first step, the establishment of an integrated autotrophic denitrification system

[0025] 1. Inoculate 3.5L of short-range nitrification sludge and 3L of anammox sludge cultivated in this laboratory into an SBR reactor with a total volume of 8L and an effective volume of 7L (see figure 1 ), the sludge concentration in the reactor after inoculation was 3480mgSS / L.

[0026] 2. According to the measured nitrite nitrogen accumulation rate and consumption rate, the operation mode of the SBR reactor is determined as follows: each cycle is: water inflow 20min, reaction 360min (3 aeration / anoxic sections, each aeration time 30min, anoxic time 90min), stirring and degassing for 60min, sedimentation for 30min, effluent for 5min, idle for 5min; 3 cycles per day, each cycle is 8 hours.

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