响应面分析法优化造纸污泥吸附剂除磷工艺

Optimization of paper mill sludge adsorbent in treatment of phosphorus containing wastewater using response surface method

以造纸厂废水污泥为原料,采用微波加热法制备造纸污泥吸附剂。利用制备的造纸污泥吸附剂对模拟含磷废水进行了吸附研究,探讨了吸附时间、投加量、pH值、转速和温度等因素对除磷效果的影响,并采用响应面设计法优化吸附工艺条件。结果表明,获得了最佳除磷工艺条件为吸附时间97 min,投加量6.9 g/L,pH=6,转速200 r/min,温度30℃,在此条件下磷的去除率可达99%以上。因此,造纸污泥吸附剂对磷的吸附效果良好,具有重要的实际应用价值。

Paper mill sludge adsorbent（PMSA） was prepared using paper mill sludge from a paper mill treatment plant by the method of microwave heating.The PMSA was used to investigate the adsorption of phosphorus in simulated phosphorus-containing wastewater.The effects of many factors such as adsorption time,the amounts of paper mill sludge adsorbent,the pH of phosphorus-containing wastewater,the shaking speed,the temperature on adsorption efficiency were studied,Furthermore,the adsorption conditions were optimized by with response surface method（RSM）.The results showed that the optimum conditions for phosphorus removal were obtained as follows： adsorption time of 97 min,addition of adsorbent of 6.9 g/L,pH 6,shaking speed of 200 r/min,reaction temperature of 30℃.Phosphorus removal was higher than 99% under the optimum conditions.Hence,the PMSA could effectively remove phosphorus,which has a promising application for treating phosphorus-containing wastewater.