Treatment of micro-polluted source water by ozone-biological activated carbon process

Based on the pilot scale experiment, with two kinds of water: effluent water after the biological pretreatment, water from north main stream of dongjiang river in low-flow period as experimental raw water respectively, the experiment of engineering in two different phases was carried out and lasted about 6 weeks so as to investigate the characteristics and the effect of ozone-biological activated carbon(O3-BAC) process treating micro-polluted raw water. Using raw water with different mass concentration as the experimental water, the results showed that, the average removal rates of CODMn, NH3-N, NO2--N, and turbidity were above 55%, 80%, 85% and 95% respectively. So it was revealed that, ozone-biological activated carbon process was an effective and practical process for advanced treatment of micro-polluted source water.