超声场耦合曝气生物填料塔处理印染废水

采用连续式超声反应器耦合曝气生物填料塔处理印染废水厂一级出水;通过实验分析对比了不同组合工艺对废水化学需氧量(COD_(Cr))和色度的去除情况.实验结果表明,采用生物处理-(超声+活性炭)处理-生物处理组合工艺对印染废水的处理效果最好.在进水COD_(Cr)为600～1 000 mg/L、色度为320倍的条件下,先经生物处理7 h后,再用 60、80、100、125 kHz 4组频率组合连续超声反应器协同活性炭处理2 h,最后经生物处理20 h,出水COD_(Cr)去除率和脱色率分别为90%和95%左右,达到了GB 4287-1992一级排放标准.

Treatment of Dyeing Effluent by Coupling Ultrasonic Field with Aerated Bio-Packing Tower

A continuous ultrasonic reactor coupling with an aerated bio-packing tower was adopted to treat the first-order dyeing effluent, and the removals of chemical oxygen demand (COD_(Cr)) and chroma with different combined technologies were then analyzed and compared. The results show that the combined technology of biotreatment-(ultrasonic+active carbon)-biotreatment is most effective in the treatment of dyeing effluent, and that, after being sequentially processed with a biological treatment for 7 h, an ultrasonic+active carbon treatment combining four ultrasonic frequencies of 60, 80, 100 and 125 kHz for 2h, and a biological re-treatment for 20h, the effluent with an initial COD_(Cr) of 600～1 000mg/L and an initial chroma of 320 meets the first-grade discharge standard of GB 4287-1992, with a COD_(Cr) removal of about 90% and a chroma removal of about 95%.