O3-BAC工艺对受污染河水中主要污染物去除效果分析

摘要

The pre-ozone-aerated biological activated carbon filter process （O3-BAC） filter was applied to investigate the reactor performance for treatment of surface water in Tongzhou section of North Canal. The results indicated that when the reflux ratio was 1：1, the system average removal rates of CODcr and NH3-N were 42% and 94.3% respectively, which was obviously superior to that of 0.5：1. While the external carbon source adding ratio for the denitrification system was 3：1, the TN removal rate increased to 34.5% and there were little change in the removal rate of NH3-N and CODcr. When the gas-water ratio decreased from 6：1 to 4：1, the TN removal rate increased to 42.5% while CODer and NH3-N removal rates changed slightly. At this time, the main pollutant indexes of the process effluent reached the standard of ornamental river water quality in the ＂The reuse of urban recycling water-Water quality standard for scenic environment use＂ （GB/ T 18921-2002）.%对预臭氧曝气生物活性炭滤池（O3-BAC）工艺处理低碳源北运河通州段原水试验效果进行分析，结果表明：回流比为1：1时，系统对CODmNH3－N的平均去除率分别为42％、94-3％，均高于回流比0．5：1时；向系统反硝化单元按C／N=3：1投加外碳源后．TN去除率增长至34．5％．而此时系统对NH3-N和CODc，的去除率变化不大；系统气水比由6：1降低至4：1后，TN去除率继续增长至42．5％．CODcr，和NH3-N去除率变化幅度不大，此时出水主要污染物指标均达到《城市污水再生利用景观环境用水水质》（GB／T18921—2002）观赏性河道类水质标准。