In fact, the temperature requirements of bacteria are lower than that of humans, even if it does not mean that it can adapt to particularly low problems, it is also limited, autotrophic nitrifying bacteria are more obvious, and the low temperature of industrial wastewater is relatively rare, because the temperature of industrial wastewater will not fluctuate greatly due to changes in environmental temperature. However, the water temperature of domestic wastewater is basically controlled by the ambient temperature, and the water inlet temperature in winter is obviously very low, especially the temperature difference between day and night is large, but it is lower than the temperature required by bacterial metabolism, making the bacteria dormant and the nitrification system abnormal! This will cause ammonia nitrogen to increase to exceed the standard!

In fact, this situation occurs more in the north, where some sewage treatment plants are not warm or heated, because the water temperature is lower than the appropriate temperature of nitrifying bacteria, and MLSS does not improve for slow metabolism in winter, resulting in a decrease in ammonia nitrogen removal rate.

So How Do You Solve This Problem? Water Quality Online Monitoring Instrument Manufacturers From the Following Points to Understand

· In the design stage, the pool body should be made of buried type, so that small sewage treatment will be more appropriate;

· To increase the sludge concentration in advance;

· Need water heating, if there is a uniform regulation pool, you can heat in the pool, so that the fluctuation will be smaller, but if it is direct water, you can use electric heating or steam heat exchange (the two mix to increase the temperature), which requires a more accurate temperature to control the fluctuation of the water;

· There is another kind that is relatively niche and has not been encountered at present, that is, aeration heating. In fact, when the air is compressed, the temperature has been increased. If the aerator pipe can withstand it, you can consider heating the compressed air to increase the temperature of the biochemical tank.

Several factors that can affect ammonia nitrogen in water exceed the standard have been understood to the position of this chapter, if you want to know about ammonia nitrogen online monitor users can pay attention to Hangzhou Modi!