碱减量废水处理技术研究

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％，生物膜法ＳＢＲ工艺的处理效果比活性污泥法ＳＢＲ工艺好。

Study of Treatment Technology for Wastewater from Alkali - Decrement

The CODcr and alkali content in the wastewater discharged fion printing and dyeing mills are very high. Anew process was tested for the treatment of the wastewater from alkali - decrement in a printing and dyeing mill usingindustrial 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 SBRprocess were studied. The results showed that the CODcr removal rate exceeded 72％ when the pH value range of acideduction was 3～4; the CODcr removal rate exceeded 62％ when the iron-carbon reaction time was 20～30 min; thetreatment result by biological mcmbrane SBR process vas better than the result by activated sludge SBR process.