Test on Pretreatment of Wet-spun Acrylic Fibre Wastewater by Fe-C Microelectrolysis Process

Wet-spun acrylic fibre wastewater was pretreated by Fe-C microelectrolysis reactor process.The effects of iron dosage,active carbon dosage and reaction time on the pretreatment results were investigated by single factor experiments.The results showed that the wet-spun acrylic fibre wastewater with initial CODCrof 1 076 mg/L,CNof 5.50 mg/L could be effectively pretreated by Fe-C microelectrolysis process.The CODCrremoval efficiency reached above 36.0%,while CN-removal efficiency reached higher than 90 % under the conditions of both iron and activated carbon dosages 35 g/L,reaction time 90 min,pH 4.50.The process was effective and easy to control.The BOD5/CODCrratio was increased from 0.39 to 0.56,so the biodegradability of wastewater was increased significantly.