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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Fe SO_4·7H_2O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),Fe SO_4·7H_2O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Fe SO_4·7H_2O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,Fe SO_4·7H_2O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,Fe SO_4·7H_2O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.
In order to enhance the treatment effect of BAF-ozone combined process, the effect of adding FeSO 4 · 7H 2 O on the treatment of COD and TP by combination process was studied by treating the effluent from secondary effluents of petrochemical industry. At the same time, , Three-dimensional fluorescence scanning (GC-MS) and gas chromatography-mass spectrometry (GC-MS) were used to systematically analyze the water quality before and after treatment.The results showed that when the secondary effluent COD concentration was 82.91 mg · L -1, When the average concentration was 1.37 mg · L -1 and the dosage of Fe SO 4 · 7H 2 O was 9 mg · L -1, the average removal rate of COD was 52.20% and the average removal rate of TP was 71.50% Compared with the control group without Fe SO 4 · 7H 2 O, COD removal efficiency increased by 17.15% and phosphorus removal efficiency increased by 51.81% .The organic matter with relative molecular weight less than 1 × 103 in raw water accounted for 52% To 75.39%, and the organic matter removal efficiency of molecular weight in each interval increased.The results of three-dimensional fluorescence analysis showed that FeSO_4 · 7H_2O could improve the removal of fluorescent substances by BAF-ozone in water.GC-MS results showed that compared with the control group , Fe SO 4 · 7H 2 O addition makes the type of organic matter in the effluent reduced, The concentration of iron salts can be enhanced BAF-ozone combined process of petrochemical secondary effluent capacity.