吸附-混凝-紫外光催化氧化法处理利福平废水

Study on the Treatment of Rifamycin Wastewater by Adsorption-Coagulation-UV Ray Catalytic Oxidation

采用吸附混凝紫外光催化氧化法处理利福平制药废水,实验表明:在活性碳用量为50g/L时CODcr和色度去除率分别为38.0%和33.3%.混凝实验选用聚合氯化铝(PAC)和聚丙烯酰胺(PAM)复合混凝,废水在pH为9,聚合氯化铝(PAC)和聚丙烯酰胺(PAM)的用量分别为400mg/L和10mg/L条件下,CODcr和色度去除率分别为32.2%和37.5%.在pH为8,加入3g/LTiO2,经紫外灯照射3h后,此时废水CODcr和色度去除率分别为92.3%和96.0%.实验结果表明:采用吸附混凝紫外光催化氧化法处理利福平废水是一种行之有效的途径,经该方法处理的利福平废水,其CODcr和色度去除率分别为97.0%和98.3%.

The process of adsorption-coagulation-UV ray catalytic oxidation is used to treat rifamycin wastewater and the best conditions of coagulation and oxidation are selected. The experiments show that better effect can be obtained when activated carbon is chosen and the best conditions are 50g/L, the removal ratio of COD_(cr) is 38.0% and decolourisation rate is 33.3%.Under the condition of pH 9, the effect of the coagulating treatment of the wastewater is better when PAC and PAM are used as coagulants and their feeding amount are 400mg/L and 10mg/L respectively, the removal ratio of COD_(cr) is 32.2%and decoloureisation rate is 37.5%. Then, under the condition of pH 8,the wastewater treated above is oxidized 3g/L by TiO_2 , when the exposure time of 3 hour, the removal ratio of COD_(cr) is 92.3% and decolourisation rate is 96.0%. Experimental results show that, for rifamycin wastewater, the removal ratio of COD_(cr) is 97.0% and decolourisation rate is 98.3% by using the process.The rifamycin wastewater treated can reach the effluent standard of medical wastewater.