The reason for the high TN of the discharged water may be caused by many factors. The following possible reasons could be summarized:
1. Low nitrogen removal efficiency of the anoxic-tank: In the practical application cases of urban sewage treatment plants, it was found that the reason for the excessive TN in the outlet water was that the nitrogen removal efficiency of the anoxic-tank was low, resulting in high nitrogen in the outlet water. The solution was to shut down the aerating system of the aerating grit chamber and add some control measures such as adding Na-acetate into the anaerobic tank to improve the stable discharge of TN in the outlet water.
2. [Lacking carbon source: In the process of nitrogen and nitrogen removal, the theoretical ratio of TN: TN required for TN removal is 2.86, but in actual operation, the ratio of TN is generally controlled at 4~6.] The lack of carbon source was one of the main reasons why the TN of the sewage treatment plant did not meet the standard. The solution was to add a carbon source according to the ratio of CH to N of 4 to 6.
3. Internal Reflux Problem: The excessive amount of nitrogen and nitrogen caused by internal return can also be attributed to the impact of organic matter. Because there is no return of nitration liquid, there is only a small amount of nitrate-nitrogen carried by external return in Pool A. Overall, it is an biochemical environment. The carbon source will only be decomposed and acidofied and will not be completely decomposed into carbon dioxide. Therefore, a large amount of organic matter entered the aerating tank, resulting in an increase in the concentration of nitrogen and nitrogen. The solution was to stop the water from entering and start the explosion.
4. Low pH. Low pH. The solution was to start adding base to maintain the pH when the pH continued to drop, and then find the reason through analysis.
It should be noted that the above reasons are only speculated based on the search results provided. The specific situation needs to be analyzed and resolved according to the actual situation.
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The story of Aquaman involves his struggle to find his place in two different worlds. He faces challenges from both human and Atlantean enemies as he strives to unite the two and bring peace. His powers and connection to the ocean play a crucial role in his adventures.