What are the advantages and disadvantages of discharging the wastewater generated by coal water slurry gasification technology when its ammonia nitrogen content is low?
Thread Content
As the title suggests, for example, in current single-nozzle and multi-nozzle gasification technologies, the wastewater discharged from the gasification unit generally contains 300–500 ppm of ammonia nitrogen. The levels of COD and chloride are also in the range of several hundred ppm. Some customers prefer that the ammonia nitrogen level be reduced further; if, after treatment, the ammonia nitrogen content in the discharged wastewater can be lowered to below 100 ppm, while the levels of COD and chloride remain unchanged, what are the advantages or disadvantages of this for the wastewater treatment unit? I appreciate your advice.
COD stands for Chemical Oxygen Demand; of course, the lower the COD level, the better. Excessively high COD leads to oxygen competition among microorganisms in the microbial tank, resulting in massive death of those microorganisms. If discharged directly, it reduces the oxygen content in water, causes it to smell bad and turn black, thereby contaminating the water quality. As for ammonia nitrogen, its high concentration, along with the decrease in wastewater temperature, causes saturated crystals to form and block valves and pipes. At the same time, ammonia nitrogen compounds are unstable and release ammonia gas, polluting the air
Companies with sufficient funds can strip ammonia-containing wastewater and then recycle it. But it feels so luxurious
NH3-N in wastewater can be treated through nitrification and denitrification. However, if there is an excess of ammonia nitrogen, more tanks are required for wastewater treatment (the tanks themselves are not expensive; what’s costly are the land on which they are built and the measures needed to prevent leakage). Additionally, a corresponding carbon source must be added, which increases costs as well.
Moderator, then it’s still beneficial to reduce the ammonia nitrogen level, right? Is it still beneficial to reduce it from 400 ppm to below 200 ppm?
There are many benefits; it just depends on how to find a balance
It’s good if there’s no ammonia nitrogen in the wastewater!
It must be beneficial to reduce the level of ammonia nitrogen, right? http://www.zzsgksjx.com/