Fenton试剂与过硫酸氢钾联合处理舱底水研究

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pH=3，Fenton试剂中30%H₂O₂投加量为19.2mL/L，FeSO₄投加量为5.21g/L，nFe2+/nH₂O₂=0.0997时，进行3次絮凝处理后舱底水的化学耗氧量（COD）从963mg/L降到120mg/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120mg/L降至20.5mg/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。

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

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 pH=3, the chemical oxygen demand (COD) of bilge water decreased from 963mg/L to 120mg/L after three-time flocculants by Fenton reagent (30%H₂O₂ 19.2mL/L, FeSO₄ 5.21g/L, and nFe2+/nH₂O₂=0.0997), up to 87.54% of COD was removed.The suspected H₂S 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 120mg/L to 20.5mg/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.