“气浮-多面球-膜”集成工艺处理微污染湖泊水

MICRO-POLLUTED LAKE WATER TREATMENT BY A FLOTATION/POROUS BALL/MEMBRANE INTEGRATED PROCESS

采用"气浮-多面球-膜"集成装置处理高藻、低浊、有机物浓度较高的某微污染湖泊水,进行为期3个多月的小试试验,重点关注该集成工艺对有机物和藻类的处理效能。试验结果表明,该工艺能够有效去除有机物和藻类,对浊度、色度、嗅味、COD、氨氮、叶绿素a的平均去除率分别为97.8%、81.7%、71.4%、71.9%、61.4%和94.6%。膜单元对浊度的去除发挥主要作用,对浊度的平均去除率为56.7%。气浮单元对藻类、色度和嗅味的去除均发挥重要作用,对上述3项水质指标的平均去除率分别为73.5%、45.3%和50.1%。气浮和多面球生物处理单元对COD和氨氮的去除均发挥重要作用,气浮单元对COD和氨氮的平均去除率分别为30%、29.5%,多面球生物处理单元对COD和氨氮的平均去除率分别为30.8%、25.2%。

A flotation-porous ball-membrane integrated process was exploited to treat micro-polluted lake water with a kind of high algae,low turbidity and high organic substances. The experiment was conducted for more than 3 months,and the attention was focused on the performance of organic substances and algae removals by the integrated process. Results showed that the integrated process removed organic substances and algae effectively. The average removal rate of turbidity,color,odor,COD,ammonia nitrogen and chlorophyll-a was 97. 8%,81. 7%,71. 4%,71. 9%,61. 4% and 94. 6%,respectively.Membrane had a significant effect on turbidity removal,and its average removal rate by this unit was 56. 7%. Flotation had a significant effect on removals of algae,color,and odor,with corresponding removal rates of 73. 5%,45. 3% and 50. 1%,respectively. Both flotation and porous balls presented good performance on COD and ammonia nitrogen removals. The average removal of COD and ammonia nitrogen by flotation was 30% and 29. 5%,respectively. While the average removal of COD and ammonia nitrogen by the porous balls was 30. 8% and 25. 2%,respectively.