What are the reasons for high ammonia nitrogen and low total nitrogen?
1. The presence of organic nitrogen:
Total nitrogen includes ammonia nitrogen, nitrate nitrogen, and organic nitrogen. Ammonia nitrogen only accounts for a portion of total nitrogen, while organic nitrogen can account for a larger proportion. If there are a large amount of organic nitrogen compounds in wastewater and the concentration of ammonia nitrogen is low, the total nitrogen concentration may be high.
2. The presence of nitrate nitrogen:
Another possibility is the presence of a large amount of nitrate nitrogen in the wastewater. Nitrate nitrogen is one of the components of total nitrogen, which usually comes from the conversion of ammonia nitrogen through nitrification. If the nitrification efficiency is high during wastewater treatment, the concentration of nitrate nitrogen may account for a large proportion of total nitrogen.
3. Source of organic wastewater:
Some industrial wastewater may contain high concentrations of organic matter, which may contain organic nitrogen. If these wastewater are not fully treated, the concentration of organic nitrogen may lead to an increase in total nitrogen.
4. Handling process issues:
Problems in the wastewater treatment process, such as low efficiency of denitrification or nitrification steps, may lead to an increase in nitrate nitrogen concentration. Similarly, deficiencies in organic wastewater treatment processes may also lead to inadequate removal of organic nitrogen substances.
5. Water quality fluctuations:
The water quality of wastewater may fluctuate due to different reasons, such as seasonal changes, rainwater erosion, different sources of wastewater, etc., which may lead to changes in total nitrogen concentration.
processing method
1. Enhanced nitrification and denitrification processes:
If the high total nitrogen is mainly caused by nitrate nitrogen, it can be considered to enhance nitrification and denitrification processes to convert nitrate nitrogen into nitrogen.
This can be achieved by adjusting operating conditions, increasing oxygen supply, optimizing biological contactors or sequencing batch reactors, and other methods.
2. Strengthening the removal of organic nitrogen:
If organic nitrogen accounts for a large proportion of total nitrogen, it is necessary to consider using more effective methods for removing organic nitrogen.
This may include increasing aerobic biological treatment time, increasing activated sludge concentration, adding external carbon sources, or using advanced oxidation technologies to degrade organic matter.
3. Improving wastewater treatment processes:
Further improve the sewage treatment process to ensure the efficient operation of each treatment unit.
This may involve improving biochemical treatment processes, increasing mixing and stirring efficiency, reducing sludge production, and maintaining equipment in good condition.
4. Post processing technology:
If the wastewater treatment process cannot meet the discharge standards, additional post-treatment units such as chemical precipitation, adsorption, or other applicable technologies can be considered to further remove nitrogen compounds
