陶粒填料-Fenton工艺处理造纸废水的研究

Study on the Treatment of Papermaking Wastewater by Ceramsite Filler-Fenton Process

关键词:  造纸废水  陶粒填料-Fenton工艺  COD去除率

Key Words:papermaking wastewater  ceramics filler-Fenton process  COD removal rate

摘要:本研究采用陶粒填料-Fenton工艺对生化处理后的造纸废水进行深度处理，以COD去除率和色度去除率为考察指标。通过单因素和正交实验得出最佳工艺条件，随后对比了相同反应条件下常规Fenton工艺与陶粒填料-Fenton工艺的处理效果，以及相同COD去除率下2种工艺的加药量。结果表明，陶粒填料-Fenton工艺最佳条件为：初始pH值=4，m(COD)∶m(H₂O₂)=1∶1.5，n(Fe²⁺)∶n(H₂O₂)= 3∶5，陶粒填料投加量150 g/L，反应时间30 min。在相同反应条件下，2种工艺对COD_Cr去除效果相近，均达70%以上，对色度去除效果明显，去除率高于80%；相同COD去除率下，与常规Fenton工艺相比，陶粒填料-Fenton工艺可节省66.7%的FeSO₄和16.7%的H₂O₂。因此，采用陶粒填料-Fenton工艺深度处理造纸废水可节省试剂加入量从而达到降低成本的目的。

Abstract:This study proposed the use of ceramsite filler-Fenton process for advanced treatment of papermaking wastewater after biochemical treatment， with the COD and chromaticity removal rates as evaluation indicators. The optimal process conditions were studied through single factor and orthogonal experiments， and the treatment efficiency of the conventional Fenton process and the ceramsite filler-Fenton process were compared under the same reaction conditions， and the chemical dosage of the two processes were also compared under the same treatment efficiency. The optimum processing conditions were pH value =4， m（COD）∶m（H₂O₂）=1∶1.5， n（Fe²⁺）∶n（H₂O₂）=3∶5， ceramsite filler dosage of 150 g/L and reaction time of 30 min. At the same conditions， the two different processes had similar COD_Cr removal rate that were more than 70%， two different processes had obvious chroma removal rate of hat was more than 80%. However， under the same COD removal rate， compared with the conventional Fenton process， the ceramsite filler-Fenton process could save 66.7% FeSO₄ and 16.7% H₂O₂. Thus， adopting ceramsite filler-Fenton process for advanced treatment of papermaking wastewater could achieve the purpose of reducing costs.