The main reasons for the high TN in the effluents were as follows: low nitrogen removal efficiency in the anoxic-tank, problems of internal recycling, low PL, destruction of the anoxic-environment in the dinitration tank, sludge load and sludge age, ratio of internal and external recycling, dinitration rate, insufficient dissolved oxygen, insufficient carbon source, etc.
There were many versions of the simplified musical score of Mountain and River, including the scores of different musical instruments such as guqin, zither, piano, xiao, and guzheng. Among them, the guqin song "High Mountains and Flowing Water" was based on "Boya Guqin Encounter Zhiyin" and had many kinds of scores. The ancient zither song "High Mountains and Flowing Water" was first seen in the "Magical Secret Music" of the Ming Dynasty. Later generations of zither music were divided into many sections. The score for the Zhejiang zither song, Mountain and Flowing Water, was composed by Wang Xunzhi and Xiang Sihua. It was divided into two parts,"Mountain" and "Flowing Water," which were performed using different playing techniques and techniques. In addition, there were also simplified musical scores for piano, flute, zither, and other musical instruments for learning and performance. The specific numbered musical scores could be found on websites such as Love to Play the Qin website and China Music Network, and they could be downloaded and printed for free.
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.
There were many versions of the High Mountain and Flowing Water Music, including Zhejiang Zheng Music and Shandong Zheng Music. The score of the Zhejiang Guzheng Music was composed by Wang Xunzhi and Xiang Sihua. It was divided into two parts,"Mountain" and "Flowing Water". Different playing techniques and techniques were used to describe the scene of mountains and flowing water. The music score of the Shandong zither music was composed with the zither music of "Lao Ba Ban" as the material, expressing the form of mountains and flowing water through chords and flower techniques. These scores were all simple, elegant, and lyrical. However, the specific content and details of the score required further research or consultation with relevant experts to obtain more accurate information.
It's not based on a factual account. 'High Water' is purely a work of fiction, crafted to entertain and engage the audience through an imaginative plot and characters.