水解酸化—好氧—Fenton氧化工艺处理制浆造纸废水工程实例

以某大型制浆造纸厂废水处理工程为例,介绍了水解酸化—好氧生物处理联合Fenton氧化深度处理工艺在造纸和制浆中段废水处理中的应用。厂内造纸废水量为0.77万～2.91万m3/d,COD为2 150～4 430mg/L,SS为1 316～2 414mg/L,经生化处理后,出水COD和SS平均分别为309mg/L和53mg/L;制浆废水量为0.84万～3.68万m3/d,COD为1 720～4 360mg/L,SS为1 184～1 994mg/L,生化处理出水COD和SS平均分别为370mg/L和56mg/L。两种废水的生化处理出水经Fenton氧化和絮凝沉淀处理后,出水COD为67～98mg/L,SS为21～29mg/L,可达《制浆造纸工业水污染物排放标准》(GB 3544—2008)排放要求。废水处理成本为2.01元/m3,具有良好的经济效益和环境效益。

Application of hydrolytic acidification- aerobic biological treatment - fenton process in pulping and papermaking wastewater treatment

The application of hydrolytic acidification-aerobic biological treatment-fenton process to treat the regenerated papermaking and wood pulping middle-stage wastewater of a large-scale papermaking enterprise was introduced.The results showed that when the influent flux,COD and SS of the regenerated papermaking wastewater were 0.77×104~2.91×104 m3/d,2 150~4 430 mg/L and 1 316~2 414 mg/L respectively,the average effluent COD and SS were 309 mg/L and 53 mg/L respectively through the bio-chemical treatment.When the influent flux,COD and SS were 0.84×104~3.68×104 m3/d,1 720~4 360 mg/L and 1 184~1 994 mg/L respectively,the average COD and SS in the effluent from bio-treatment were 370 mg/L and 56 mg/L respectively.When the mixed wastewater of these two bio-chemical effluents was treated by fenton oxidation and flocculation sedimentation process,the effluent COD and SS decreased to 67~98 mg/L and 21~29 mg/L respectively,which met the Discharge standard of water pollutants for pulp and paper industry(GB 3544—2008).The treatment cost was about CNY 2.01/m3,which has good economic and environment benefits.