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实验采用混凝-Fenton氧化预处理抗生素废水,筛选出最佳的混凝条件及氧化条件,同时对经混凝-Fenton试剂预处理后的废水与未经处理的废水按同样反应条件开展好氧生化试验。实验发现,采用聚合氯化铝(PAC)和聚丙烯酰胺(PAM)复合混凝处理该废水,在pH为8,PAC与PAM的用量分别为400mg/L和12mg/L时混凝效果较好。混凝后的废水再用芬顿体系氧化,当pH为3,FeSO·47H2O投加量为0.01mol/L,H2O2/Fe2+摩尔比4:1下,反应30min时,取得了满意的结果。实验表明,采用混凝-芬顿氧化法预处理抗生素废水后,明显改善了其可生化性,为后续生化处理打下了良好的基础。
In the experiment, the coagulation-Fenton oxidation was used to pretreat the antibiotic wastewater, and the best coagulation conditions and oxidation conditions were screened. At the same time, the pretreated and coagulated-Fenton reagent wastewater was treated with the same reaction conditions for aerobic Biochemical tests. The experimental results showed that the coagulation effect of PAC and PAM was better when the pH value was 8 and the dosage of PAC and PAM were 400mg / L and 12mg / L respectively . The coagulated wastewater was further oxidized by Fenton’s system. Satisfactory results were obtained when the pH was 3, the dosage of FeSO · 47H2O was 0.01mol / L, the molar ratio of H2O2 / Fe2 + was 4: 1 and the reaction time was 30min. Experiments show that the use of coagulation - Fenton oxidation of antibiotic wastewater pretreatment significantly improved its biodegradability, and laid the foundation for subsequent biochemical treatment.