【作者】 陈力行；

【导师】 史惠祥；

【作者基本信息】 浙江大学 ， 环境工程， 2010， 硕士

【摘要】 造纸工业水耗高,废水排放量大,对其深度处理技术进行研究和应用,以推动废水循环利用,意义重大。本文对臭氧-曝气生物滤池联合工艺深度处理造纸废水进行了研究,考察了气水比、水力负荷、运行周期等操作参数对处理效果的影响,探究了曝气生物滤池（BAF）的快速启动情况,研究了其对常规污染物及造纸废水特征污染物的降解特性,同时结合臭氧预氧化,探究了臭氧对废水可生化性的提高及联合工艺对各种污染物的降解效果。实验结果表明,BAF深度处理废纸造纸废水适宜的运行条件为:气水比3:1,水力负荷0.23m³/（m³·h）,反冲洗周期7～8天;滤池对COD_Cr的去除主要集中在0～60cm处,对氨氮的去除主要集中在20～80cm处,对浊度的去除主要集中在0～40cm处;BAF具有快速启动能力。造纸废水经臭氧预氧化8min后,可生化性得到了显著的提高,B/C由0.21提高到0.45,再经BAF处理后各种污染物均有良好的去除效果,在适宜的运行条件臭氧投量50mg/L,接触8min,BAF气水比3:1,水力负荷0.23m³/（m³·h）,联合工艺对COD_Cr、UV₂₅₄、氨氮、浊度、色度及邻苯二甲酸二异丁酯（DIBP）的去除率分别达到54.9%、74.5%、88.3%、92.2%、88.8%、46.9%,出水水质达到制浆造纸工业水污染物排放标准（GB3544-2008）,其运行费用为1.25元/t。更多还原

【Abstract】 With the development of paper industry,the problems such as water consumption and wastetwater discharge become more serious,so it is important to strengthen the advanced treatment of paper mill wastewater and promote the wastetwater reuse.This work studied the advanced treatment of paper mill wastewater by combined process of ozone-biological aerated filter.The impact of operating parameters on the treatment effect such as air-to-liquid ratio,hydraulic loading and operation period were investigated.The quick start-up situation of BAF,degradation characteristics of conventional pollutants and particular pollutants in paper mill wastewater were also analyzed.Furthermore,the effect of the improvement of biodegradability by preozonation and the degradation effect of combined process on pollutants were researched.Results show that air-to-liquid ratio 3:1,hydraulic loading 0.23m³/（m³·h）, backwash period 7～8 days were the optimum operating condition.The removal of COD_Cr,NH₃-N and turbidity by BAF were mainly focused in the range of 0～60cm, 20～80cm,0～40cm,respectively.It demonstrated that biological aerated filter had quick start-up capability.After preozonation of 8 minutes,the biodegradability of wastewater was substantially increased,where B/C ratio was increased from 0.21 to 0.45.Pollutants could be deeply removed by combined process of ozone-biological aerated filter,under conditions of ozone dose 50mg/L,contact time 8min,BAF air-to-liquid ratio 3:1 and hydraulic loading 0.23m³/（m³·h）,the removal of COD_Cr, UV₂₅₄,NH₃-N,turbidity,colority and DIBP reached 54.9%,74.5%,88.3%,92.2%, 88.8%and 46.9%,respectively.The effluent could meet the newly issued discharge standard of water pollutants for pulp and paper industry（GB3544-2008）.The treatment cost for such combined process was 1.25 yuan/t.更多还原