Condition Analysis and Optimization of Tetracycline Hydrochloride Wastewater Treatment by Three-Dimensional Electrode Method
In order to solve the problems of high operating cost and high energy consumption in the practical engineering operation of sewage treatment by three-dimensional electrode method,the effects of different levels of initial pH,reaction voltage,aeration intensity,electrolyte dosage and electrode spacing on the reaction effect were discussed,and the reasons that affected the cost and energy consumption were analyzed.In order to solve this problem and give full consideration to the practical application value,the power consumption,degradation per unit effective electrode area and current efficiency of the system for removing COD were studied and calculated.The most suitable electrode spacing for practical engineering application was 6.5 cm,and the best reaction conditions for practical engineering operation were as follows:reaction voltage 7 V,aeration intensity 1 L·min-1,electrolyte dosage 2.5 g·L-1,and initial pH=4.Under these conditions,the degradation rate of tetracycline hydrochloride was 100%,and the degradation rate of COD was 83.47%.The particle electrode used in the experiment was iron-loaded activated carbon electrode,and the reaction device was self-made plexiglass reactor.The selected analytical indexes were tetracycline hydrochloride degradation rate and COD degradation rate.
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