厌氧技术在化工厂高浓度污水预处理中的应用

Application of Anaerobic Technology in Pretreatment of High Concentrated Wastewater of Chemical Production

为了更加有效地处理己内酰胺高浓度废水,在原A/O处理系统前采用上流式厌氧污泥反应器先对高浓度己内酰胺废水进行预处理,工业应用结果表明:由于己内酰胺高浓度废水中含有大量的硫酸盐、磷酸盐和硝酸盐等无机酸盐,因此必须严格控制反应系统进水的pH在5.5～6.5之间,以有效保证系统平稳运行,防止酸化;当进水COD质量浓度控制在8000～12000mg/L时,COD的去除率可达到55%以上,达到了处理后的水质要求。

The pretreatment of high caprolactam contained wastewater with up-flow anaerobic sludge bed reactor was applied before the original A/O treatment for effectively treating, The commercial application showed that the pH value of the input wastewater should be severely controlled at the rang of 5.5-6.5 for stable operation and acidizing prevention due to the large quantity of inorganicsalts, such as sulfate, phosphate and nitrate, in the wastewater. At a COD content of 8 000-12 000 mg/L in the input wastewater, the COD removal rate could reach more than 55%, which met the demand of discharge.