臭氧氧化法去除养殖废水中典型污染物研究

Study on removal of typical pollutants from aquaculture wastewater by ozone oxidation

目前,工业化循环水养殖得到了国家的大力推广和支持,但是在水的循环使用过程中,有机物以及抗生素等污染物的沉积导致水质恶化,严重影响水的重复利用。臭氧法作为一种处理废水的手段,具有独特优势。基于此,研究了臭氧对养殖废水中典型污染物抗生素(以盐酸土霉素为代表)以及有机物(以罗丹明B为模型化合物)的去除效果,同时也测试了臭氧处理实际废水时的效果。结果表明:在酸性条件下,臭氧处理10min后,对罗丹明B的去除率接近100%;处理100min后,对盐酸土霉素的去除率达90%。采用臭氧法处理罗丹明B以及盐酸土霉素时,盐度对降解速率影响较小;臭氧对典型养殖废水(投放饲料含鱼粉26%、虫粉9%)具有较好的处理效果,在处理30min后,能去除水中95.8%的有机物,化学需氧量(COD)可降低至0.165mg/L。

At present,industrial recirculating aquaculture had been vigorously promoted and supported by the state.However,in the process of water recycling,the deposition of pollutants such as organics and antibiotics led to the deterioration of water quality,which seriously affected the reuse of water.As a means to treat wastewater,ozone had unique advantages.In this paper,the removal effect of ozone on antibiotics(represented by oxytetracycline hydrochloride)and organic compounds(Rhodamine B as the model compound)in aquaculture wastewater was studied,and the effect of ozone treatment on real wastewater was also tested.The results showed as follows:Under acidic conditions,the removal rate of Rhodamine B was close to 100%after 10min ozone treatment;After 100min ozone treatment,the removal rate of oxytetracycline hydrochloride reached 90%.When Rhodamine B and oxytetracycin hydrochloride were treated by ozone method,salinity had little effect on degradation rate;Ozone had a good treatment effect on typical aquaculture wastewater(fish meal content of 26%,insect meal of 9%).After 30min treatment,95.8%of organics in the water could be removed,and chemical oxygen demand(COD)could be reduced to 0.165mg/L.