酞菁蓝生产废水处理试验研究

Test of treatment of wastewater from pathalocyanine production

采用了酸化预沉、铁炭还原、吹脱和两段A/O组合工艺处理酞菁蓝生产废水,进行了优化处理工艺的小试研究,得到了各单元的优化参数。在混合进水COD、TN、Cu2+的质量浓度分别为8 893、1 657、348 mg/L时,经酸化预沉使得废水中的COD、TN、Cu2+分别下降38.7%、31.4%、73.0%。铁炭还原则进一步改善了废水的生化性,将m(BOD):m(COD)从0.05提高到0.31。吹脱效果最好的pH值是11,最佳停留时间60 min。两段A/O生物处理系统的最佳水力停留时间60 h,混合液回流比为2.5。研究表明,在优化的运行条件下,采用该组合工艺可以有效处理酞菁蓝生产废水,出水达到污水综合排放标准二级。

A combined process which included acidification precipitation,iron-carbon reduction,air stripping and two phase A/O process was used in treatment of wastewater from pathalocyanine production,through the research,the optimized parameters of every units were determined.When the mass concentration of COD,TN,Cu^2＋ in the mixed influent water were 8 893,1 657,348 mg/L respectively,after the acidification precipitation,the corresponding values decreased 38.7%、31.4%、73.0% respectively.The iron-carbon reduction could further improve the biodegradability of the wastewater and increased m（BOD） ： m（COD） from 0.05 to 0.31.The optimal pH value and retention time for the air stripping were 11,60 min respectively.For the two phase A/O process,the optimal hydraulic retention time and mixed liquid refluence ratio were 60 h and 2.5 respectively.The research indicated that,under the optimized operation condition,wastewater from pathalocyanine production could be effectively treated by the said combined process and the quality of the effluent water could meet the standard of class 2 in Intergrated Wastewater Discharge Standard.