| 曝气生物滤池(Fe2+)-臭氧组合工艺强化处理石化二级出水 |
| 摘要点击 2204 全文点击 1006 投稿时间：2016-06-30 修订日期：2016-08-15 |
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| 中文关键词 石化废水二级出水 深度处理 BAF-臭氧 相对分子质量分布 有机物 |
| 英文关键词 petrochemical secondary effluent advanced treatment BAF-ozonation relative molecular weight distribution organic matter |
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| 中文摘要 |
| 为了强化曝气生物滤池（BAF）-臭氧组合工艺的处理效果，以石化二级出水为处理对象，研究了投加FeSO4·7H2O对组合工艺处理COD和TP效果的影响，同时采用分子量分级、三维荧光扫描、气相色谱-质谱联用仪（GC-MS）等手段对工艺处理前后水质进行了系统分析.结果表明，在二级出水COD平均浓度82.91 mg·L-1，TP平均浓度1.37 mg·L-1，FeSO4·7H2O投加浓度为9 mg·L-1时，组合工艺COD平均去除率为52.20%，TP平均去除率为71.50%，相比不加FeSO4·7H2O的对照组，COD去除率提高17.15%，除磷效率提高51.81%.原水中相对分子质量小于1×103的有机物占52%，铁盐强化组合工艺处理后该部分比例增加至75.39%；同时各区间分子量的有机物去除效率提高.三维荧光分析结果表明，FeSO4·7H2O可以提高BAF-臭氧对水中荧光类物质的去除效果.GC-MS结果表明，与对照组相比，FeSO4·7H2O的投加使得出水中有机物的种类减少，浓度降低.铁盐可以强化BAF-臭氧组合工艺处理石化二级出水的能力. |
| 英文摘要 |
| Two parallel biological aerated filters (BAF)-ozonation,named as number 1(feeding with FeSO4·7H2O) and number 2,were used to treat petrochemical secondary effluent.The effect of FeSO4·7H2O on COD and phosphorus removal by BAF-ozonation was studied.Molecular weight distribution,three-dimensional fluorescence scan and gas chromatography-mass spectrometry (GC-MS) were used to analyze water quality before and after BAF-ozonation.The results showed the average COD and TP concentrations were 82.91 mg·L-1 and 1.37 mg·L-1,respectively.When the dosage of FeSO4·7H2O was 9 mg·L-1,the average removal rates of COD and TP were 52.20% and 71.50%,respectively.The average COD removal rate in number 1 combined process was 17.15%,which was higher than that in number 2 combined process.The TP removal rate in number 1 combined process was increased by 51.81%.The percentage of dissolved organic matters with relative molecular weight less than 1×103 was 52% in the raw wastewater.However,the percentage increased to 75% when treated by number 1 combined process and the removal rate of various molecular weight organics was increased.Three-dimensional fluorescence analysis showed that the dosage of FeSO4·7H2O could improve the removal of fluorescent substances.GC-MS results showed that the number and concentration of organics were reduced after number 1 combined process in comparison with number 2 combined process.BAF-ozone could be enhanced by FeSO4·7H2O when treating petrochemical secondary effluent. |
