| O3-BAC深度处理石化废水厂尾水的特性及菌群结构分析 |
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| 引用本文： | 张超,单明皓,许丹宁,古明哲,代蓓蓓,纪轩,孙井梅.O3-BAC深度处理石化废水厂尾水的特性及菌群结构分析[J].环境科学,2018,39(10):4628-4635. |
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| 作者姓名： | 张超 单明皓 许丹宁 古明哲 代蓓蓓 纪轩 孙井梅 |
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| 作者单位： | 天津大学环境科学与工程学院;中石化天津分公司水务部 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项（2015ZX07203-011） |
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| 摘 要： | 采用连续流O_3-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O_3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O_3接触时间为40 min,O_3投加量为20 mg·L-1,BAC单元空床停留时间为1.5 h条件下,O_3-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;O_3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%,O_3-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O_3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;O_3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.O_3-BAC工艺可以有效应用于石化尾水的深度处理中.
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| 关 键 词： | 石化尾水 深度处理 O3-BAC 相对分子质量 菌群分析 |
| 收稿时间： | 2018/1/30 0:00:00 |
| 修稿时间： | 2018/3/26 0:00:00 |
Characteristics of Advanced Treatment of Treated Petrochemical Water by O3-BAC and Analysis of Consortium Structure |
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| ZHANG Chao,SHAN Ming-hao,XU Dan-ning,GU Ming-zhe,DAI Bei-bei,JI Xuan and SUN Jing-mei.Characteristics of Advanced Treatment of Treated Petrochemical Water by O3-BAC and Analysis of Consortium Structure[J].Chinese Journal of Environmental Science,2018,39(10):4628-4635. |
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| Authors: | ZHANG Chao SHAN Ming-hao XU Dan-ning GU Ming-zhe DAI Bei-bei JI Xuan and SUN Jing-mei |
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| Institution: | School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China,School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China,School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China,School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China,Department of Water Affairs, Tianjin Petrochemical Company of Sinopec, Tianjin 300271, China,Department of Water Affairs, Tianjin Petrochemical Company of Sinopec, Tianjin 300271, China and School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China |
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| Abstract: | 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. |
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| Keywords: | treated petrochemical water advanced treatment O3-BAC relative molecular weight consortium structure |
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