High ammonia-nitrogen wastewater mainly comes from chemical, metallurgy,PCB etching process and other industries. The ammonia nitrogen in the wastewateris mainly in the form of ammonium salt or NH4OH with strong pungent smell andNH3-N concentration of 1-50g/L. It is a kind of high-pollution wastewatersubject to stringent direct discharge control.
Common treatment processes include: physic-chemical method,bio-denitrification method, and biochemical combination method
ammonia nitrogen exist the ionization balance in the water below
NH4+ + OH- = NH3·H2O
After adjusting the PH value to alkaline,then separate the ammonia-nitrogenwith deammonia membrane in heat condition
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