摘要
采用三级跌水曝气生物接触氧化预处理微污染水源水,试验结果表明,在水温为8～25℃(平均16.9℃),水力停留时间(HRT)为1.5h时,生物接触氧化单元对浊度、CODMn、藻类、UV254等的去除率随着温度的升高而增加,其平均去除率分别达到了37.2%、17.2%、62.8%、10.7%,对NH3-N的去除负荷为0.65mg·L-1·h-1,当水温高于20℃时,对NO2--N的去除率达到了60%以上。三级跌水曝气共充氧1.61mg·L-1,出水溶解氧浓度大于3.97mg·L-1。
The pre-treatment of micro-polluted source water with three-stage water-dropping aeration biological contact oxidation was studied. The results showed that when raw water temperature variation ranged from 8℃to 25℃, the average temperature was 16.9℃ and HRT was 1.5 hours, the removal rates of main pollutants by the unit of water-dropping aeration biological contact oxidation increased with the increasing of temperature. The average removal rates of turbidity, CODMn, algae and UV254 were flow separately：37.2%, 17.2%, 62.8% and 10.7%. The removal loading rates of ammonia nitrogen was 0.65 mg·L^-1·h^-1 When raw water temperature was above 20℃, the removal rate of NO2^--N was over 60%. The total DO aerated by the three steps water-dropping was 1.61mg·L^-1 and the DO of effluent was more than 3.97 mg·L^-1.
出处
《水处理技术》
CAS
CSCD
北大核心
2008年第11期50-53,共4页
Technology of Water Treatment
基金
华北水利水电学院青年科研基金项目(HSQJ2006004)
关键词
跌水曝气
生物接触氧化
微污染
water-dropping aeration
biological contact oxidation
micro-polluted
