APPLICATION OF AIRLIFT MEMBRANE BIOREACTOR FOR SLAUGHTERHOUSE WASTEWATER TREATMENT: 20 M3/DAY PILOT STUDY IN HA NOI, VIET NAM
Tóm tắt
Untreated wastewater from slaughterhouses has been contributing to the contamination of Day River due to its high concentration of COD, BOD, total nitrate (TN) and total phosphate (TP). Centralized wastewater treatment is not a good option at present due to lack of wastewater conveyance infrastructure and finance. On-site wastewater treatment has been emerging a better choice. This study evaluates an onsite wastewater treatment system using an airlift membrane bioreactor for a slaughterhouse in a suburb of Ha Noi. The system was designed to treat 20 m3/day slaughterhouse wastewater. Wastewater from the Slaughterhouse contains 1060 ± 458 mg/L COD, 1060 ± 458 mg/L BOD and 451 ± 133 mg/L TN. Anaerobic and anoxic tanks were operated at the mixed liquor volatile suspended solid (MLVSS) of 1,500 mg/L. Cross-flow velocity, airlift flow rate and the transmembrane pressure (TMP) were maintained at 2 bar. The removal efficiencies of COD, TN were 89.1±4% and 85±8.7%, respectively. The results proved that AL-MBR could work well at pilot scale and be promising for upscaling along Nhue - Day River in future.
