Improvement in Sensory Properties of Micro-Polluted Lake Water Using Membrane Reactor Combined Process

To improve the water quality of micro-polluted lake water, an integrated process of dissolved air flotation (DAF)/modified attapulgite (M-ATP)/membrane filtration was applied to treat micro-polluted lake water with poor sensory attributes. The results showed that the average removal rate for water turbidity, color and odor using this process system were 95.8%, 83.1%, and 90.0% in order. Moreover, the M-ATP unit had the best treatment effect in turbidity and odor removal, with removal rates of 48.7% and 49.8%, respectively. While the DAF unit could remove 46.6% of the color at the same time. Based on the analysis of different processing units, the correlation between the removal rates of different processing units was explored using SPSS software. The results indicated that correlation between the three processing units is negative. In addition, in the three-month operation period, the initial transmembrane pressure (TMP) of the membrane device was about 2.3 kPa, and the final TMP was only about 4.5 kPa. This research provided technical reference for the treatment of micro-polluted lake water.