Can alkali solutions reduce ammonia nitrogen in wastewater?

This post was last edited by cdpulin on 2012-3-7 at 16:45. The treatment of wastewater containing ammonia nitrogen using spent alkaline solutions involves chemical denitrification, with the stripping method being the primary approach. Under the condition of raising the pH of wastewater, this method converts ammonia nitrogen into ammonia; by then exposing it to an appropriate amount of air, the ammonia can be released into the atmosphere. Wastewater containing high concentrations of hydrogen and helium can have its ammonia nitrogen converted to NH3OH under alkaline conditions (pH around 10), after which NH4OH in the wastewater can be recovered through air stripping or steam stripping. The removal efficiency of ammonia nitrogen by this method mainly depends on the stripping temperature, the size of the stripping device and its length-to-diameter ratio, the gas-to-water ratio, and the gas-liquid contact efficiency. Generally, the removal rate of ammonia nitrogen can exceed 90%, and the ammonia nitrogen concentration in the treated wastewater can be reduced to below 200 mg/L. When using chlorine to disinfect ammonia-containing water, it has been observed that there is a breakpoint phenomenon between the residual chlorine level in the water and the amount of chlorine added. At the start of chlorination disinfection, as the amount of chlorine added increases, the residual chlorine level in the water rises gradually. This is because chlorine reacts with ammonia present in the water to form chloramines, which are reactive forms of chlorine and possess disinfecting properties; hence, the residual chlorine level in the water increases. Ion exchange method can also be used! ! :)

So where does the sodium in the alkaline slag go? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

Alkaline solutions cannot treat ammonia nitrogen. The only option is to convert ammonia nitrogen into ammonia in a combined state, and then separate it from the liquid surface into the air through vaporization, stripping, or ammonia distillation; thereafter it can be absorbed. Sulfuric acid or phosphoric acid can generally be used for absorption to produce nitrogen fertilizers or compound fertilizers.