Mn/γ-Al_2O_3催化剂的制备及头孢合成废水的催化臭氧氧化法深度处理

Preparation of Mn/γ-Al_2O_3 Catalyst and Advanced Treatment of Cephalosporin Synthesis Wastewater

对Mn/γ-Al2O3催化剂的制备条件及头孢合成废水的催化臭氧氧化法深度处理工艺条件进行了优化.实验结果表明：以Mn （NO3）2溶液为浸渍液,Mn/γ-A12O3催化剂的最优制备条件为浸渍液浓度0.10 mol/L、浸渍时间9h、焙烧温度400℃、焙烧时间2h;在反应时间为30 min、废水pH为9.0、臭氧通量为4.6 mg/min、催化剂加入量为5g/L的条件下,当进水COD、BOD5、ρ（氨氮）和色度分别为220～250 mg/L,8M0 mg/L,10～12 mg/L和60～70倍时,出水COD、BOD5、ρ（氨氮）和色度的平均去除率分别为53％,30％,33％和93％,出水水质满足GB 21904-2008《化学合成类制药工业水污染物排放标准》的要求.

The preparation conditions of the catalyst Mn/γ-A12O3 and the process conditions for advancedtreatment of the secondary treatment effluent of cephalosporin synthesis wastewater by catalytic ozone oxidation were optimized.The optimum preparation conditions of Mn/γ-Al2O3 catalyst are as follows：using Mn（NO3）2 solution as impregnating solution,impregnating solution concentration 0.10 mol/L,impregnation time 9 h,calcination temperature 400 ℃,calcination time 2 h.Under the conditions of reaction time 30 min,wastewater pH 9.0,ozone flux 4.6 mg/min and catalyst dosage 5 g/L,and when the COD,BOD5,ρ（ammonia nitrogen）and chroma of the influent are 220-250 mg/L,8-10 mg/L,10-12 mg/L and 60-70 times respectively,the average removal rates of COD,BOD5,ρ（ammonia nitrogen）and chroma are 53％,30％,33％ and 93％,respectively.The effluent quality can meet the discharge standards of GB 21904-2008.