不同臭氧预处理工艺组合常规工艺对西氿水中COD_Mn和UV₂₅₄的去除效果

The Removal Performance of COD_Mn and UV₂₅₄ in Xijiu Lake by Combination of Different Ozone Pretreatment Process and Conventional Process

摘要: 常规工艺对西氿水中的COD_Mn和UV₂₅₄处理效果不佳。并且，由于原水中较高的本底值，出水中的COD_Mn和UV₂₅₄已无法满足日趋严格的国家标准。因此考虑采用臭氧相关预处理工艺以保障出水水质。研究发现，采用常规工艺时，COD_Mn和UV₂₅₄的去除率分别为29.96%~33.73%和24.11%~37.89%；采用预臭氧(O3)–常规工艺时，预臭氧投加量为2.17 mg/L时，COD_Mn去除率在30.93%~38.11%，UV254去除率在32.04%~45.63%；采用O3/H2O2–常规工艺时，CODMn和UV254的去除率分别为48.78%~49.69% 和41.52%~49.38%；采用O3/UV预处理工艺时，与相同臭氧投加量的单一臭氧预处理单元相比，对COD_Mn和UV₂₅₄的去除率分别提高了4.74%~26.29%和7.34%~22.94%。

Abstract: The COD_Mn and UV₂₅₄ in Xijiu Lake could be slightly removed by conventional process. Moreover, the COD_Mn and UV₂₅₄ in effluent can’t satisfy the standard for drinking water quality of GB5749-2006 due to the high background level in raw water. Thus, it is to be considered to add with pretreatment process involved ozone to ensure water quality. It was founded by research that the removal efficiency of COD_Mn and UV₂₅₄ was 29.96% - 33.73% and 24.11% - 37.89% respectively when conventional process was adopted, the quality of effluent can’t reach the standard stably. The removal efficiency of COD_Mn and UV₂₅₄ was 30.93% - 38.11% and 32.04% - 45.63% respectively when combination of ozone and conventional process was adopted (the amount ozone was 2.17 mg/L). It was partly better than conventional process but still can’t reach the standard stably. The removal efficiency of COD_Mn and UV₂₅₄ was 48.78% - 49.69% and 41.52% - 49.38% when combination of ozone/hydrogen peroxide and conventional process was adopted, the quality of effluent was better than first two process and more stable. Comparing with single ozone pre-treatment unit in same ozone amount, the removal efficiency of COD_Mn and UV₂₅₄ was improved by 4.74% - 26.29% and 7.34% - 22.94%.