With the increase of major factories, sewage discharge has also increased, the water environment is easy to become more and more tense, and some lakes, rivers and other water sources have appeared eutrophication phenomenon, which has attracted the attention of relevant departments! As a result, major factories are required to install water quality monitors in the drainage outlet to carry out real-time monitoring to ensure that the sewage is discharged without exceeding the standard. So is the total nitrogen index really that important in sewage monitoring?
The discharge standards of major sewage plants, localities, enterprises, etc. have put forward clear requirements for total nitrogen emissions! Therefore, before sewage discharge in these places, it is necessary to monitor whether the total nitrogen content exceeds the standard! Why is the total nitrogen index so important in sewage monitoring?
Total nitrogen is the general term of nitrate nitrogen, nitrite nitrogen, ammonia nitrogen and organic nitrogen. Ammonia nitrogen in water will produce nitrite under the action of oxygen, and further form nitrate. At the same time, nitrite in water can be converted into nitrogen under anaerobic conditions by microorganisms. This process is the main indicator of water eutrophication! In China, the total nitrogen concentration of 1.0mg/L is regarded as the standard of eutrophication water quality. Ammonia nitrogen in inorganic nitrogen is the eutrophication hormone in water, which is the main factor leading to the occurrence of water eutrophication, and the main oxygen-consuming pollutant in water body has certain harm to organisms in water. Therefore, total nitrogen has become the binding index of the main emission after COD.
From the above, do you still think that the total nitrogen index is not important in sewage monitoring? The total nitrogen in water can be discharged only when it reaches the index standard of our country! The TN-8000 Total Nitrogen online analyzer is used to monitor the total nitrogen content in water in real time, so as to determine whether the total nitrogen in water meets the standard. The instrument adopts ultraviolet colorimetric method. Under the condition of high temperature and high pressure, various nitrogen-containing compounds in water sample are oxidized by potassium persulfate and converted into nitrate. Then adjust the acidity and alkalinity of the solution, the depth of the color of the solution under ultraviolet irradiation is proportional to the total nitrogen content in the water sample, and the total nitrogen content in the sample is obtained by measuring the absorbance value of the reaction product.
