脉冲电絮凝法处理黄连素制药废水

Treatment of Berberine Hydrochloride Pharmaceutical Wastewater by Pulse Electro-coagulation

采用脉冲电絮凝方法对黄连素制药废水进行处理,比较了其与传统电絮凝的能耗差距,考察了占空比、电流密度、脉冲频率、电极间距及反应时间对处理效果的影响.结果表明:与传统电絮凝相比,脉冲电絮凝法节能优势明显,其能耗仅为传统电絮凝法的20%;在最优反应条件(占空比为0.3,脉冲频率为1.0kHz,电流密度为19.44mA/cm2,电极间距为2.0cm,反应时间210min)下,模拟废水中CODCr和黄连素的去除率分别达到69.6%和72.8%;采用最优条件处理实际废水,其CODCr与黄连素的去除率分别为62.6%和92.1%.

Pulse electro-coagulation （PE） technology was applied to the treatment of berberine hydrochloride pharmaceutical wastewater. A comparison between pulse electro-coagulation and traditional electro-coagulation （EC） was carried out, and the influences of pulse duty cycle, current density, pulse frequency, electrode distance, and electrolysis time on the removal effieiencies of berberine hydrochloride and CODer were investigated. The results indicated that the energy cost by PE decreased 80% in cmnparison with that of EC. Under the optimal conditions of duty cycle of 0.3, pulse frequency of 1.0 kHz, current density of 19.44 mA/cm2 , electrode distance of 2.0 cm, and reaction time of 210 rain, the removal efflcieneies of berherine hydrochloride and CODer reached 72.8% and 69.6% , respectively. Under the above optimal conditions, real berberine hydrochloride wastewater was treated by PE ; the removal effleieneies of berberine hydrochloride and CODer reached about 92. 1% and 62.6% , respectively.