内循环式铁碳微电解/H_(2)O_(2)耦合工艺处理多晶硅有机废水

Treatment of Polysilicon Organic Wastewater by Inside-circle Coupling Technology of Fe/C Micro-electrolysis and HO

针对铁碳微电解反应中填料易板结及处理效率低等问题,通过增加内循环装置改进反应器结构,同时将铁碳微电解与H2O2进行工艺耦合,用于处理多晶硅有机废水,考察了Fe-C投加量、初始p H值、H2O2投加量、反应时间等工艺条件对COD去除率的影响,并通过响应面法优化了工艺条件。结果表明,各工艺条件对多晶硅有机废水COD去除效果的影响大小为:铁碳投加量>反应时间>H2O2投加量>初始p H值,其最适宜工艺条件为:铁碳投加量250 g·L^(-1),初始p H值2.8,H2O2投加量112 m L·L^(-1),反应时间83 min,该反应条件下COD的去除率为71.26%。铁碳/H2O2降解多晶硅有机废水COD的动力学回归方程为Y=0.5273X-0.6347,降解COD的速率常数为0.5273 min^(-1)。

In order to solve the problems such as filler hardening and low efficiency of Fe/C micro-electrolysis,the internal circulation was added to prevent the device from clogging.Coupling technology of Fe/C micro-electrolysis and H2O2 was applied to polysilicon organic wastewater,and the effects of technological conditions such as dosing quantity of iron-carbon,initial p H,dosing quantity of H2O2,reaction time on removal efficiency of COD were mainly investigated,respectively.Moreover,the reaction conditions have been optimized by response surface method.The results indicate that the influence level of factors on removal treatment efficiency was:Fe/C micro-electrolysis,reaction time,dosing quantity of H2O2 and initial p H value.The optimum technological conditions for reaction were:dosing quantity of iron-carbon 250 g·L-1,initial p H value 2.8,dosing quantity of H2O2112 m L·L-1,reaction time 83 min.Under this reaction conditions,the removal rate of COD reached 71.26%.The kinetic regression equation of COD by coupling Fe/C micro-electrolysis and H2O2 was Y=0.5273X-0.6347,and the degradation rate constant was 0.5273 min-1.