| O3-BAC深度处理石化废水厂尾水的特性及菌群结构分析 |
| 摘要点击 1486 全文点击 531 投稿时间：2018-01-30 修订日期：2018-03-26 |
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| 中文关键词 石化尾水 深度处理 O3-BAC 相对分子质量 菌群分析 |
| 英文关键词 treated petrochemical water advanced treatment O3-BAC relative molecular weight consortium structure |
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| 中文摘要 |
| 采用连续流O3-BAC对华北某石化废水处理厂尾水进行了中试处理实验，研究了O3氧化对COD及UV254处理效果的影响，同时对处理过程中有机物的变化特性及稳定运行30 d时BAC填料中的微生态环境进行了分析.结果表明，在O3接触时间为40 min，O3投加量为20 mg·L-1，BAC单元空床停留时间为1.5 h条件下，O3-BAC工艺出水COD为24 mg·L-1，平均去除率为40.4%，相对于单独BAC工艺去除率提高10.0%，UV254的平均去除率为55.1%，且COD与UV254之间呈一定的相关性，相关系数R2为0.89；O3氧化后相对分子质量<1×103的比例由尾水中的69.0%提高到了87.0%，O3-BAC工艺中NPOC的去除率为45.8%，较单独BAC工艺提高23.0%，且BAC单元去除的NPOC主要由相对分子质量<1×103的组分所贡献；经GC-MS图谱及有机物统计分析，经O3氧化后烷烃类、不饱和酯类及酚类等有机物得到明显的去除；O3氧化后BAC单元的微生态环境得到明显改善，其中微生物种类（丰度在1.0%以上）由6种增加到了11种.O3-BAC工艺可以有效应用于石化尾水的深度处理中. |
| 英文摘要 |
| The advanced treatment of treated petrochemical water by Ozone-Biological Activated Carbon (O3-BAC) was carried out in this study. The effect of O3 on the removal of Chemical Oxygen Demand (COD) and Spectral Absorption Coefficient (UV254) were investigated. The characteristics of organic matter and the microbial consortium structure of BAC were also investigated at 20 mg·L-1 of O3 dosage concentration, 40 min of O3 single stage contact time and 1.5 h of the empty bed residence time of BAC. Results showed that the effluent COD concentration of O3-BAC was 24 mg·L-1 with the removal efficiency of 40.4%. The COD removal efficiency of O3-BAC was higher than that for the BAC process. The UV254 removal efficiency of O3-BAC was 55.1%. Meanwhile, UV254 correlated with COD with a correlation coefficient of 0.89. The percentage of dissolved organic matters with relative molecular weight less than 1×103 increased from 69.0% to 87.0% after O3 oxidation. The NPOC removal efficiency of O3-BAC (45.8%) was higher than that of the BAC process (23.0%). The NPOC removal efficiency of the BAC unit was mainly achieved by reduction of dissolved organic matters with relative molecular weight less than 1×103. GC-MS analysis results showed that organic substances such as alkanes, unsaturated esters, and phenols had been removed by O3 oxidation. The micro ecological environment of the BAC unit had been significantly improved after O3 oxidation, and the genera with relative abundance over 1.0% increased from 6 to 11. The combined O3-BAC system can be applied to the advanced treatment of petrochemical treated water. |
