When it comes to ammonia nitrogen and organic nitrogen, they are routine monitoring projects in the environmental protection industry, and the words of ordinary companies are simple tests, and many people do not understand their sources. In this chapter, Modi water quality online monitoring instrument manufacturers to understand the main sources of organic nitrogen and ammonia nitrogen in wastewater.
First, organic nitrogen, which is mainly formed by proteins, as well as urea, uric acid, fatty amines and other compounds, some organic nitrogen is difficult to biodegrade (such as: gum, chitin, etc.). These organic nitrogen will be stored in the raw material industry effluent. However, some iron and steel, fertilizer, ferroalloy, glass manufacturing and feed production and other industries discharge wastewater contain ammonia nitrogen, in addition to leather and animal excrement and other fresh wastewater ammonia nitrogen initial content is not high, due to the deammonification and reaction of organic nitrogen in wastewater storage or in the drainage pipeline after a period of time, ammonia nitrogen solubility will increase.
From this point of view, the solubility of organic nitrogen or ammonia nitrogen in industrial wastewater depends on many factors such as the nature of raw materials, the production process used, the consumption of water and the reuse rate of water.
As for the treatment of organic nitrogen, biological methods can be used to remove organic carbon in microorganisms at the same time, through biological assimilation and biological mineralization, organic nitrogen in the wastewater is converted to ammonia nitrogen, and then blown off with air. Ion exchange and other methods to remove the ammonia nitrogen.
In addition, the NH3N-8000 ammonia nitrogen online monitor used by the user is used to monitor the content of ammonia nitrogen in water. The water sample was sent to the ammonia nitrogen digestion tank after the pretreatment device, and then potassium bichromate was added, and the ammonia nitrogen concentration in the water was measured by colorimetry after high temperature and high pressure reaction in the presence of silver and mercury salts. At the same time, the water sample was taken into the colorimetric tank, and the sodium reagent or salicylic acid was added for the colorimetric determination of ammonia nitrogen. The degree of change of the color of the solution in the remeasurement range is proportional to the concentration of ammonia nitrogen in the water sample, and the content of ammonia nitrogen in the water sample can be calculated by measuring the absorbance of the solution.
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