吸附—混凝—紫外光催化氧化法处理医药废水的研究

Study on the Treatment of Pharmaceutical Industry Wastewater by Adsorption-Coagulation-UV light Catalytic Oxidation Process

采用吸附—混凝—紫外光催化氧化法对医药废水进行处理。在废水pH为6.8、聚合氯化铝(PAC)和阳离子聚丙烯酰胺(PAM)的用量分别为400和12mg/L条件下,废水COD、色度去除率分别为37.8%、72.7%;在废水(混凝处理后)pH为3、分3次加入H2O2(投加量为2.5g/L)条件下,紫外光照射6h后,废水COD、色度去除率分别为97.6%、100%。用该法处理后的医药废水,其COD、色度去除率分别为99.1%、100%,出水水质达到医药行业废水二级排放标准。

The adsorption-coagulation-UV light catalytic oxidation process was used in the treatment of pharmaceutical industry wastewater.The experiments show that when the influent pH is 6.8,the dosage of cationic aluminum polychloride (PAC)is 400 mg/L and that of polyacrylamide (PAM)is 12 mg/L,the removal rates of COD and color are 37.8% and 72.7% respectively;and then when the treated wastewater pH is 3,the dosage of H2O2 added by three times is 2.5 g/L,and the radiation time of UVlight is 6 h,the removal rates of COD and color are 97.6% and 100% respectively;the total removal rates of COD and color are 99.1% and 100% respectively;the effluent quality can meet the second grade discharge standard for pharmaceutical industry wastewater.