Fenton试剂与过硫酸氢钾联合处理舱底水研究

Studying bilge water treatment by combination of Fenton reagent and potassium monopersulfate

使用Fenton试剂与过硫酸氢钾联合对舱底水的净化处理进行了研究,通过控制变量法确定最佳实验条件。结果表明在p H=3,Fenton试剂中30%H2O2投加量为19.2 m L/L,Fe SO4投加量为5.21 g/L,n Fe2＋/n H2O2=0.0997时,进行3次絮凝处理后舱底水的化学耗氧量（COD）从963 mg/L降到120 mg/L,水体COD去除率高达87.54%。同时可以有效去除水体似H2S气味,且水体颜色由深棕色浑浊状态变为无色透明状态。絮凝后的水样使用过硫酸氢钾进行氧化处理,在酸性条件下,反应温度为50~60℃时,过硫酸氢钾的氧化效率最高,且过硫酸氢钾投放量为理论投放量的1.3倍时,可以有效去除水体中难去除有机物,使水体COD含量从120 mg/L降至20.5 mg/L,去除率为82.35%。最终,采用Fenton试剂与过硫酸氢钾氧化联合对舱底水进行净化处理,COD的去除率达97.82%,氧化后出水COD含量达到国家排放标准。

Combination of Fenton reagent and potassium monopersulfate was applied to treat bilge water and the optimal conditions were determined by variable control method. The results showed that at p H = 3,the chemical oxygen demand（ COD） of bilge water decreased from 963 mg / L to 120 mg / L after three-time flocculants by Fenton reagent（ 30% H2O219. 2 m L / L,Fe SO45. 21 g / L,and n Fe2 ＋/ n H2O2= 0. 0997）,up to 87. 54% of COD was removed. The suspected H2 S smell in the water was also disappeared,and the water color became transparent from dark-brown and opacitas. After flocculants,the water sample was oxidized by potassium monopersulfate. Under acidic condition,the potassium monopersulfate had the highest oxidized efficiency at 50 ~ 60℃. The organic matter in the bilge water was degraded significantly when the adding amount of potassium monopersulfate was 1. 3 times as the theoretical amount.Then the COD in the bilge water decreased from 120 mg / L to 20. 5 mg / L and the removal efficiency was 82. 35%.Finally,the COD removal efficiency reached 97. 82% after the bilge water was treated by the combination of Fenton reagent and potassium monopersulfate,and the COD concentration matched national wastewater discharge standard.