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The Design of a Nitrite Reactor

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nitrite reactor

The design of a nitrite reactor is simple and effective. A side stream sludge treatment with FA or low DO can improve nitrite accumulation. The operating temperature in the nitrite reactor ranged from 30.6 to 7.7 degC. The microbial community fluctuated in the NAR range from 85 to 13%. In the nitrite adsorption zone, Nitrosomonas was the dominant AOB and Nitrospira was the predominant NOB.

Both experimental and control reactors produced high levels of nitrite. At low DO, the nitrite reaction occurred, and nitrite concentrations increased. The aeration rate was reduced to six mL min-1 on day 27, when the nitrite concentration spiked significantly. Aeration rates of 60 mL per minute were sufficient for nitrification. A nitrite bioreactor should be able to maintain a high DO during nitrification.

 

A nitrite reactor's effluent was tested to determine the nitrite concentration. The control reactor's nitrite concentration was higher than that of the control reactor. During nitrification, aeration rates of sixty mL min-1 were sufficient to trigger nitrification. When these conditions were reduced to six mL min-1, nitrite concentrations soared dramatically.

 

The ANRC was designed to be portable and easy to scale up. The microbial communities in the experimental reactors clustered, indicating an incomplete washing process of NOB. The microbial communities of the nitrite-in-water experiment showed a high rate of nitrite accumulation. Further optimization of the process will increase nitrite removal efficiency. The nitrite reduction efficiencies achieved by a nitrite-adsorption system will eventually reduce nitrite levels to zero.

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on Mar 01, 22