Influence of the combined packing on removal efficiency of ammonia nitrogen from high concentration ammonia nitrogen wastewater

摘要

Two types of packing were applied to improve ammonia nitrogen removal efficiency and study stripping condition.Through laboratory experiment of air stripping,it was found the same optimum condition with column packed with two types of packing respectively:wastewater temperature T =80°C and pH =11.5,gas-liquid volume ratio r =250:1,dosage of surfactant C =20 mg· L-1.And the overall removal efficiency using pall ring is 4％ higher than that of using combined packing.