强化原位生物接触氧化技术改善水源水质的试验研究

The onsite experiment study of enhanced bio-contact oxidation process for pretreatment of Luanhe River water

在扬水曝气条件下,在原位进行了强化生物接触氧化技术改善滦河水源水质的试验研究,分析测定其处理效果,研究了生物填料悬挂于自然水体不同水深、不同水力停留时间下对生物预处理效果的影响.试验结果表明,扬水曝气加原位采用生物接触氧化组合用于水源水质改善是可行的;该技术对水中CODMn、氨氮、叶绿素a、真实色度、TOC、UV254、铁和锰平均的去除率分别可达10.1%、64.1%、42.4%、48.6%、12.5%、9.5%、48.9%和41.9%;生物填料可悬挂在水体0～3 m水深区,停留时间应大于2～3 h.

Under the operation of Multifunctional Device for Water Lifting and Aeration （MDWLA） , onsite experiment was made by use of the enhanced bio-contact oxidation process for pretreatment of Luanhe River water to remove CODMn, ammonia-nitrogen, chlorophyll-a, true color, TOC, UV254 , iron and manganese. It was mainly studied the effects of different depths of biological medium submerged under the water surface and different hydraulic residential times on the removal of above indexes. The experimental results showed that the combined technique of water-lifting aeration and bio-contact oxidation pwcess was feasible, and the removal rate of CODMn, ammonia-nitrogen, chlorophyll-a, real color, TOC, UV254, iron and manganese by the technique were 10.1% ,64. 1% ,42.4% ,48.6% , 12.5% ,9.5% ,48.9% and 41.9% respectively. Biological medium could be suspended or fixed under the water surface 0 ～ 3 m, and the hydraulic residential time should be controlled more than 2 ～ 3 h.