2008•Journal of Nanjing University of TechnologyRequires access
Treatment of high concentration ammonia-nitrogen wastewater by air stripping
Bao Zong-hong
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Abstract
The high-enriched ammonia-nitrogen wastewater from the catalyst production is treated by air stripping.The influencing factors on the maximum removal rate of ammonia-nitrogen,including the stripping time,the value of pH,and the temperature of the wastewater,were investigated.The results showed that with pH 11.5,the temperature 80℃,stripping time 120min,the removal rate was 99.2%.The effects of stripping temperature and the ratio of air to liquid for the operation of the commercial device by air stripping were further explored.The optimum technological condition for operation was described as follows: pH 11.5,the temperature 80℃ and the volume ratio of air to liquid 300.