碱减量废水处理技术研究

Study of Treatment Technology for Wastewater from Alkali-Decrement

印染厂排放的碱减量废水 ,CODcr和碱含量很高。利用工业废酸、废铁屑和电石渣 ,研究了印染碱减量废水处理新工艺 ,对酸析 pH点、铁炭反应时间、生物膜法SBR和活性污泥SBR处理效果进行了探讨 ,结果表明 :在酸析点 pH3～4时 ,CODcr去除率大于72% ;铁碳反应时间20～30min,COD去除率大于62% ;

The CODcr and alkali content in the wastewater discharged from printing and dyeing mills are very high.A new process was tested for the treatment of the wastewater from alkali-decrement in a printing and dyeing mill using industrial spent acid,scrap iron and carbide slag.The pH value range of acid eduction,the iron_carbon reaction time and the results of the treatment using biological membrane SBR(sequencing batch reactor) process and activated sludge SBR process were studied.The results showed that the CODcr removal rate exceeded 72% when the pH value range of acid eduction was 3～4;the CODcr removal rate exceeded 62% when the iron_carbon reaction time was 20～30 min;the treatment result by biological membrane SBR process was better than the result by activated sludge SBR process.