Bench-scale study on the effect of coagulation-sedimentation-biological aerated filter process on hydraulic loom wastewater treatment

It is meaningful to purify and reuse the wastewater on hydraulic loom which consumes a lot of high quality water. According to the wastewater quality analysis, the main pollution factor of hydraulic loom wastewater consists of suspending solids (32.0%), colloidal substances (47.4%) and others, which can be removed by physiochemical methods. Bench scale study shows that coagulation sedimentation process can reduce the Chemical Oxygen Demand (COD) from 214.3 to 43.4 mg/L; further activated carbon biological aerated filter can decrease the COD to around 12.6 mg/L and can meet the water criterion of hydraulic loom.