Advanced oxidation processes with OyUV were applied to treat the acrylic fiber wastewater after biotreatment. Through studying the change of COD removal rate after treatment, adjusted pollutants concentration and initial pH value and surveyed the effect of reaction timed )to COD removal ratio; compared the wastewater that was added an amount of NaHCO3 with the raw water, watched the change of COD removal ratio. Experiment results demonstrate that the suited concentration to the reaction was in 2-fold diluted raw water; COD removal efficiency had the linearity relations with reaction time at keeping the reaction 30 minutes. When the reaction time was 35.6 minutes, the turning-point of the experiment, COD removal rate reached to 47%, and the longer time had no obvious effect; the optimal initial pH value was from 6.5 to 8.5. There was another discovery that adding an amount of NaHCO3 to the wastewater can help to improve the removal ratio and shorter the needing reaction time in these experiments. For COD removal efficiency reaching 70%, adding lOOmg-L"' NaHCO3 needed 30min and adding 200mg·L-1 NaHC03 needed 25min, a shorter response time.%运用0/3UV协同高级氧化法处理睛纶废水生化出水,调整污水中污染物的浓度和反应初始PH值,考察处理后COD去除率的变化情况,并观察反应进行时间对COD去除率的影响;尝试向反应用水中添加适量的NaHC03,与不添加的情况比较,观察COD去除率的变化.实验结果表明,原污水稀释2倍后再进行高级氧化处理更为合理;当反应进行时间在30min内时,COD去除率与时间(t)保持线性关系,反应时间为35.6min时达到去除率的拐点,此时的去除率达到47%,继续延长反应时间效率不高;适合反应进行的初始PH值范围为6.5～8.5.实验还发现,向污水中投加适量的NaHCO,有助于COD的去除并可以缩短反应需要的时间.投加100mg.L-1 NaHCO3时,COD去除率达到70%所需的时间为30min,将投加量提高至200mg.L-1,达到相同的去除率所用的时间缩短为25min,
展开▼
