ZHENGHao,XUDan-ning,DAIBei-bei,et al.Catalytic Ozonation Combined with BAC Process for Advanced Treatment of Petrochemical Wastewater[J].China Water & Wastewater,2023,39(1):73-79.
Catalytic Ozonation Combined with BAC Process for Advanced Treatment of Petrochemical Wastewater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第1期
Page:
73-79
Column:
Date of publication:
2023-01-01
- Keywords:
- catalytic ozonation; biological activated carbon; petrochemical wastewater; refractory organic matter; molecular weight distribution; structure of organic matter
- Abstract:
- The ozonation (activated carbon as catalyst) tandem along with biological activated carbon (BAC) was applied to degrade refractory petrochemical wastewater. From the perspectives of water quality change, molecular weight distribution and structure of organic matter, the degradation of refractory organic matter in petrochemical wastewater by catalytic ozonation was investigated and its influence on the effluent quality of subsequent BAC unit was analyzed. The catalytic ozonation had a certain enhancement effect on the removal of COD and UV254, and the enhancement effect on the subsequent BAC unit was more obvious, espesdcially for UV254. When the ozone dosage was 15 mg/L and 20 mg/L, compared with the ozonation without catalyst, the removal rate of UV254 by catalytic ozonation was increased by 9.4% and 11.5%, and the removal rate of UV254 by subsequent BAC unit was increased by 17.0% and 15.4%, respectively. The change of catalytic condition on molecular weight distribution of organic matter in influent was more obvious when the dosage of ozone was 15 mg/L. Compared with ozonation, the catalytic ozonation increased the removal rate of NPOC by 5.4%, and the proportion of NPOC with molecular weight less than 1 ku increased by 6%. After the influent was catalyzed by ozonation, the structure of organic matters was significantly changed, and the types of refractory organics such as phenolic, alkanes and unsaturated chain esters were significantly reduced.
Last Update:
2023-01-01