Experimental study on the treatment of leachate from waste transfer station using coagulation sedimentation,air floatation,ABR,AA/O,and MBR process
The waste leachate generated from the operation of waste transfer stations poses a significant environmental pollution risk due to its complex and fluctuating water quality,which contains suspended solids,oil and grease,organic matter,salts,nitrogen,and other pollutants.To address this issue,an experimental study was conducted at a waste transfer station in Zhejiang Province,using a coagulation sedimentation,air flotation,ABR,and AA/O-MBR process.This multi-step treatment approach dem-onstrated remarkable effectiveness in treating the leachate.The coagulation sedimentation and air flota-tion unit successfully removed suspended solids and oil and grease from the leachate,while the ABR-AA/O biological treatment unit proved efficient in removing organic matter,ammonium nitrogen,and total nitrogen from the leachate.The experiment results showed that the influent water had initial con-centrations of CODcr,NH4+-N,TN,and SS ranging from 15 130 to 20 540 mg/L,278.0 to 413.0 mg/L,289.0 to 437.0 mg/L,and 4 330 to 6 317 mg/L,respectively.After treatment,the effluent water ex-hibited significantly reduced concentrations,with CODCr,NH4+-N,TN,and SS ranging from 134 to 313 mg/L,0.4 to 0.9 mg/L,46.4 to 65.1 mg/L,and 8 to 14 mg/L,respectively.The average removal rates were 98.72％for CODCr,99.81％for NH4+-N,84.91％for TN,and 99.79％for SS.The effluent quality satisfied the requirements of the Water Quality Standards for Sewage Discharge into Urban Sew-ers(GB/T 31962-2015).In conclusion,the process has good technical adaptability and promising prospects for industrialization.
Waste transfer stationLeachateCoagulation precipitation and air flotationABR-AA/OMBR
万方数据
维普
