高浓度废弃乳化液电解处理技术研究

Research of high concentration waste lubricant electrolysis treatment technology

废弃的金属拉丝用乳化液COD值和BOD值超标严重。利用石墨板和钛板作为电解反应器的阴阳两极材料,通过电解试验,分析电流密度、电极间距、pH、NaCl添加质量浓度4个因素对COD去除率的影响。电流密度越高,COD去除率越高;随着电极板间距的减小,废乳化液的COD去除率不断提高,电解时间越长,COD去除效果越明显;加酸或加碱均能促进废水COD的去除,酸性越强,电解效果越好;在相同的电解时间内,随着NaCl投加质量浓度的增加,COD去除率呈上升趋势。得出电解最佳条件:电流密度i=400 A/m^2,pH=5,NaCl投加质量浓度10g/L,电极间距5 mm,电解15 min,对COD去除率达90.7%,对氨氮的去除率达66.9%。

The COD and BOD value of waste metal wire drawing lubricant were exceeded seriously. The influence of current density,electrode spacing,p H and Na Cl on the removal rate of COD was analyzed by means of electrolytic test,using graphite plate and titanium plate as anode and cathode materials. The higher the current density,the higher the removal rate of COD. With the decrease of the electrode plate spacing,the COD removal efficiency of waste lubricant was increasing. The longer the electrolysis time,the more obvious the effect of COD removal. The addition of acid or alkali can promote the removal of COD in wastewater,and the stronger the acidity,the better the electrolysis effect. In the same electrolysis time,the COD removal rate increased with the increase of the mass concentration of NaCl. The best conditions of electrolysis: current density i = 400 A / m^2,pH = 5,mass concentration of NaCl 10 g/L,electrode spacing 5 mm,electrolysis time 15 min,the removal rate of COD reached to 90. 7%,and the removal rate of ammonia nitrogen reached to 66. 9%.