Fenton/絮凝工艺深度处理制浆造纸废水的工程应用分析

以某制浆造纸厂生化出水Fenton/絮凝深度处理工艺长期运行数据为依据,系统分析了H2O2、废酸液（FeSO4含量约8%）、硫酸铝、PAM及氧化钙等处理药剂用量与水量、进水负荷和COD去除量之间的关系。结果表明,H2O2、废酸液、硫酸铝、PAM及氧化钙的单位水量平均投加量分别为0.05、2.18、0.07、0.0075和0.27 kg/m3,而去除单位COD的药剂平均消耗量分别为0.20、8.48、0.27、0.029和1.06 kg/（kg COD）;H2O2、废酸液、硫酸铝和氧化钙的用量随进水负荷的增大而增加,而PAM随进水负荷的变化较小。H2O2和FeSO4的投加摩尔比（MH2O2/Fe2＋）主要集中在1.0-2.0之间,其中在1.0-1.6之间的累积频率达到93%。该工艺的出水COD和SS分别为65-100 mg/L和20-30 mg/L,达到《制浆造纸工业水污染物排放标准》（GB 3544-2008）排放要求。废水深度处理成本约为1.01元/m3,其中药剂费用约0.58元/m3,占56.98%。

Application analysis of Fenton /flocculation process for advanced treatment of pulp and papermaking wastewater

The relation of H 2 O 2,waste acid（8% FeSO 4）,Al 2（SO 4） 3,PAM,CaO and treatment capacity,influent load,COD removal were analyzed based on the long term operation date of a Fenton / flocculation process used for advanced treatment of pulp and papermaking wastewater.The average dosages of H 2 O 2,waste acid,Al 2（SO 4） 3,PAM and CaO to unit volume of wastewater were 0.05 kg/m3,2.18 kg/m3,0.07 kg/m3,0.0075 kg / m3and 0.27 kg / m3,respectively,and the average reagent consumption of COD removed were 0.20 kg /（kgCOD）,8.48 kg /（kgCOD）,0.27 kg /（kgCOD）,0.029 kg /（kgCOD） and 1.06 kg /（kgCOD）,respectively.The dosages of H 2 O 2,waste acid,Al 2（SO 4） 3 and CaO increased with the increase of influent load,but PAM had no significant change.The molar ratio of H 2 O 2 / Fe2 ＋（MH 2 O 2 / Fe2 ＋） was about 1.0 - 2.0,and the cumulative frequency of MH 2 O 2 / Fe2 ＋between 1.0 and 1.6 was about 93%.The effluent COD and SS were 65 - 100 mg / L and 20 - 30 mg / L,respectively,and met the Discharge Standard of Water Pollutants for Pulp and Paper Industry（GB 3544-2008）.The treatment cost of the advanced process was about 1.01 yuan / m3,in which the chemical cost was 0.58 yuan / m3and accounted for 56.98%.