摘要：
针对机械加工乳化液废水稳定性好、COD浓度高,难以处理的问题,采用加热酸析和盐析相结合的方法进行破乳,并使用芬顿试剂进行氧化处理.通过单因素实验,考察相关因素对处理效果的影响,确定最佳工艺条件.结果表明,在100 mL乳化液中加入0.75 mL 98% H2SO4,98% H2SO4与NaCl质量比为1:1,温度为70 °C,时间为150 min条件下,废水的浊度和COD的去除率分别达到93.73% 和56.95%;在芬顿氧化过程当,pH为3,H2O2用量为250 mL/L,FeSO4 ·7H2O用量为6 g/L时,COD去除率达65.7%;再调节pH至8,曝气投加PAC沉降后,COD降至10156 mg/L,可生化性明显提高.%For the problems of good stability,high COD concentration of emulsion wastewater from mechanical processing,the method of heating acid and salting-out is used for demulsifica-tion.Fenton reagent is used for oxidation treatment.The relevant factors of the treatment effect are investigated by the single factor experiment,and the optimum technological condi-tions are determined.The experimental results show that under the conditions of adding acetic acid content of 0.75 mL 98% H2SO4in 100 mL emulsion,mass ratio is 98% H2SO4and NaCl 1:1,temperature 70 °C,time 150min,the turbidity and COD removal rate of wastewater are 93.73% and 56.95% respectively.In the Fenton oxidation process,when pH is 3,the dosage of H2O2250 mL/L and the dosage of FeSO4· 7H2O 6 g/L,the removal rate of COD is 65.7%.When the pH is adjusted to 8,aeration plus PAC sedimentation,COD drops to 10 156 mg/L,biodegradability is thus greatly improved.
