Photocatalytic Oxidation Treatment Of Antibiotic Wastewater New Technology

Nowday, more and more antibiotic have been produced. As a result, the antibiotic wastewater has been discharged from the medical factory and endangers our environment if the wastewater cannot be treated by effective technology. Therefore how to treat the antibiotic wastewater has become more and more important in our society. Photocatalysis oxidation technology is a new wastewater technology, whose advantages are high treatment efficiency, simple technics equipment, operating condition easily. Many facts have proved that photocatalysis oxidation technology can treat many kinds of organic pollutant. In this experiment, tetracycline is the study object. Through the treatment of tetracycline by TiO₂ photocatalysis, we can learn the effect of different photocatalysis condition, different oxidant supply and different photocatalyst. Also, we can learn that the effect of the antibiotic wastewater and Chinese traditional medical wastewater treatment by TiO₂ photocatalysis, and analyze the feasibility.The paper chooses tetracycline as the object, and analyzes the feasibility of treatment by TiO₂ photocatalysis. It review the optimal condition of TiO₂ supply, irradiation time, different pH value, different tetracycline concentration, different light strength for tetracycline treatment by TiO₂ photocatalysis. Also, the effect of various oxidant supplies and the dynamics of tetracycline treatment by photocatalysis have been studied. And the experiment show that the result of tetracycline treatment by photocatalysis is optimal under the condition of TiO₂ supply 1.5g,pH 3,irradiation time 120mrn, tetracycline concentration 400mg/L, light strength 60W and the COD_cr reduction can reach 66% in above condition; The adding of oxidant can also improve the photocatalysis result, the effect of oxidant is Fenton > H₂O₂ > Fe³⁺; The rate of degradation of tetracycline can be described by the Langmuir-Hinshelwood equation.At the same time, this paper compare the result of different photocatalys and different antibiotic by TIO₂ photocatalysis, the result show that the efficiency of TiO₂ is better than Fe₂O₃ and ZnO; the efficiency of TiO₂/ZnO is better than TiO₂ and the...