Research On Refractory Wastewater By Microwave Induced Catalytic Process

This article had treated two typical refractory wastewater using microwave induced catalytic process. The two types of wastewater were indigo carmine in dyeing wastewater and antibiotics in pharmaceutical wastewater. In this article, the characteristics and harm of indigo carmine and antibiotics wastewater were introduced, and this article also reviewed the development of the two types of wastewater research.First, this article treated the wastewater of indigo carmine using microwave induced catalytic process. From ingle factor and orthogonal test adopting, this experiment attained the optimization process parameters as follows. To the 100mg/L indigo carmine 100ml, when the activated carbon quality was 5g, the microwave radiation seven minutes, and radiation power was 100%, the discoloration rate reached 98.79%. And all the factors influencing, microwave radiation time> microwave power> the activated carbon quality.This article did repeated experimentation and regeneration research on the activated carbon as a catalyst. And the results indicated that, when activated carbon after regeneration as catalyst retreat indigo carmine, indigo carmine discoloration rate could increase 10%.And then comparing activated carbon carried FeSO4 activated carbon carried CuSO4 and normal activated carbon as catalyst in microwave systems on tail water of the antibiotics. And the results indicated:activated carbon carried FeSO4 as microwave catalyst reached the highest COD discoloration rate. Then adopting activated carbon carried FeSO4 as catalyst in microwave induced catalytic process treated the tail water of the antibiotics. The results indicated:Increasing the quality of activated carbon carried FeSO4, microwave radiation time and power, the COD discoloration rate in tail water of the antibiotics increased also, but the value of influence factors was not the bigger the better.This article did kinetic analysis in microwave induced activated carbon carried FeSO4 catalytic process on tail water of the antibiotics, the results indicated:this reaction process approximate the first order kinetics, and the kinetics equation is lnC=-0.1413t+5.4121, in this equation, r=0.9876, velocity constant is 0.1413min-1. The mechanism of microwave induced activated carbon carried FeSO4 catalytic process removing contaminants are accelerated absorption of activated carbon and "microwave hot".This article is an exploring of new method in refractory wastewater, and widens the scope of microwave application. These studies possess important actual significance in refractory wastewater treatment.