首页> 外国专利> METHOD FOR ADVANCED TREATMENT OF PAPERMAKING WASTEWATER BY ADVANCED OXIDATION OF ACTIVATING PERSULFATE OR PEROXYMONOSULFATE WITH FERROUS SALT

METHOD FOR ADVANCED TREATMENT OF PAPERMAKING WASTEWATER BY ADVANCED OXIDATION OF ACTIVATING PERSULFATE OR PEROXYMONOSULFATE WITH FERROUS SALT

机译:过硫酸盐或过硫酸高氧硫酸盐与高级硫酸盐的高级氧化处理造纸废水的方法

摘要

A method for advanced treatment of papermaking wastewater by advanced oxidation of activating persulfate or peroxymonosulfate with a ferrous salt. The method is divided into two phases, namely, an oxidation phase and a precipitation phase. The oxidation phase is carried out in an advanced oxidation device where wastewater is prone to mix, and the hydraulic retention time is 30min-120min. Persulfate or peroxymonosulfate is subjected to reaction with a ferrous salt to generate sulfate free radicals with a strong oxidizing property, and organisms in the wastewater are oxidatively degraded. The precipitation phase is carried out in a precipitation device, the hydraulic retention time is 1.5h-5h, and an alkaline solution or poly aluminum chloride is added so as to promote the flocculation and sedimentation of iron mud. The method has high efficiency, easy operation, and wide applicable pH range.
机译:一种通过用亚铁盐对过硫酸盐或过氧一硫酸盐进行活化的高级氧化处理造纸废水的方法。该方法分为两个阶段,即氧化阶段和沉淀阶段。氧化阶段在废水易于混合的高级氧化装置中进行,水力停留时间为30分钟至120分钟。过硫酸盐或过氧一硫酸盐与亚铁盐反应生成具有强氧化性的硫酸根自由基,废水中的生物被氧化降解。沉淀阶段在沉淀装置中进行,水力停留时间为1.5h-5h,并加入碱溶液或聚氯化铝以促进铁泥的絮凝和沉淀。该方法效率高,操作简便,适用pH范围宽。

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