一体化纳滤设备处理生活污水的中试研究

采用新型抗污染纳滤膜，研制开发了纳滤中试成套设备处理生活污水，确定了其最佳操作压力为600kPa，产水量为12L／min，回收率为85％，除盐率为72．8％。在该条件下，对生活污水的处理效能高，对c0D、BOD、TP、Fe的去除率最高分别达到95％、96％、96．27％和l00％，平均去除率分别为85．82％、88．51％、89．49％和92．50％。出水除氨氮外，均达到生活杂用水标准。设备运行周期为30d，采用化学清洗与水力冲洗相结合的清洗方法，化学清洗剂为0．1mol／L的Na0H溶液。

PILOT-SCALE SCTUDY ON INTEGRATED NF EQUIPMENT TREATING DOMESTIC WASTEWATER

The pilot-scale integrated nanofiltration equipment with anti-pollutant NF membrane was developed to treat domestic wastewater. The equipment was tested to determine the optimal operation conditions: operating pressure:600kPa, water output: 12 L/min, recovery rate: 85% and demineralization rate: 72.8%. Under these conditions, it possessed high treating efficacy for domestic sewage; the highest removal rate for COD, BOD, TP, FE reached to 95%, 96%, 96.27%, and 100%; average removal rates were 85.82%, 88.51%, 89.49% and 92.50% respectively. Except for ammonia and nitrogen, the effluent water reached the standards of domestic water discharging; the period of the equipment operating was 30 days; the chemical washing in combination with hydraulic flush was adopted for washing the equipment with the chemical washing agent of 0.1 mol/L NaOH solution.