非均相类Fenton催化剂处理马铃薯淀粉废水的实验研究

Experimental study on treatment of potato starch wastewater by heterogeneous Fenton-like catalyst

马铃薯淀粉废水产生的季节性导致生物处理法应用存在诸多困难,而常规物化法处理效率较低,废水后续处理负担大。采用γ-氧化铝为载体,加入活性组分Cu制备了非均相高效催化剂,促进H2O2分解以产生更多·OH自由基,提高了废水处理效果。通过单因素实验方法考察了反应的主要影响因素及最佳反应条件。结果表明,在废水pH为6、催化剂投加量为2.0 g/100 mL、氧化剂(30%H2O2)投加量为5 mL/100 mL、反应温度为70℃、反应时间为45 min的最佳反应条件下,马铃薯淀粉废水中COD去除率为87.57%,浊度去除率为97.89%。该方法对马铃薯淀粉废水的处理效果较为理想,可以为马铃薯淀粉企业废水污染防治提供参考。

Potato starch wastewater is always generated seasonally rather than continuously,which causes many difficulties in the application of biological treatment methods.The conventional physicochemical treatment method exhibits low efficiency in treating potato starch wastewater,leading to a large burden for subsequent treatment.In this paper,γ-alumina is used as carrier and active component Cu is added to prepare a heterogeneous high-efficiency catalyst,which can decompose rapidly H2 O2 to generate a large amount of·OH free radicals and improve the treatment effect of wastewater.The main factors affecting the catalyst reaction and the optimal reaction conditions are investigated through single factor experiments.It is shown that the highest removal rate of COD and turbidity in potato starch wastewater can reach 87.57%and 97.89%,respectively under the best conditions that the dosages of catalyst and oxidant is 2.0 g/100 mL and 5 mL/100 mL respectively,the reaction temperature is set at 70℃,the reaction lasts for 45 min and pH is set at 2.This method shows an ideal effect on the treatment of potato starch wastewater,and can provide reference for the prevention and control of wastewater pollution in potato starch producers.