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吹脱-沸石吸附法处理荧光粉生产废水研究
Treatment of phosphor industrial wastewater by stripping-zeolite absorption technology
【摘要】 研究了吹脱-沸石吸附法处理荧光粉生产废水。正交试验结果表明:氨吹脱工艺中影响NH3-N去除率因素的重要性顺序为:pH>温度>气液比。当pH=11、气液比(V/V)=100∶1、温度T=40℃、吹脱时间t=120 m in,吹脱工艺对荧光粉生产废水中NH3-N的去除率为74.46%。试验确定的沸石吸附单元较佳的工艺参数为:滤速0.04 m/m in、接触时间14m in、pH=7.5,吹脱-沸石吸附工艺总NH3-N去除率96.04%。试验结果表明再生沸石氨吸附性能稳定,适于高氨氮的荧光粉生产废水处理。
【Abstract】 The treatment of phosphor industrial wastewater by stripping-zeolite absorb technology was studied.The orthogonal experimental results showed that the importance sequence of affecting factors on ammonia removal efficiency in stripping process were: pH>temperature>gas-liquid ratio.Under the conditions of pH=11、gas-liquid ratio(V/V)=100∶1、temperature=40 ℃、stripping time=120 min,the removal rate of ammonia nitrogen in stripping process is 74.46 %.The better technological parameters of zeolite-absorb process drew by experiment were: filtrate speed=0.04 m/min、touch time=14 min、pH=7.5.The total ammonia nitrogen removal rate of stripping-zeolite absorption process was 96.04 %.The ammonia nitrogen absoption capacity of the regeneration zeolite was stable and suitable for the treatment of the high ammonia nitrogen concentration wastewater such as phosphor industrial wastewater.
【Key words】 phosphor; wastewater; stripping; zeolite-absorption; ammonia nitrogen; regeneration;
- 【文献出处】 环境工程学报 ,Chinese Journal of Environmental Engineering , 编辑部邮箱 ,2007年02期
- 【分类号】X703
- 【被引频次】6
- 【下载频次】247