摘要
向经过曝气的高铁高锰深井地下水中加入生活污水以模拟微污染地下水,并考察了生物除铁除锰滤池对其的净化效果。滤柱高为2.7 m,内径为60 mm,内装填除铁除锰能力已经成熟的锰砂,设计滤速为6 m/h。研究了去除有机物滤层的培养过程及在不同滤速下对各污染物的去除规律,结果表明:生物滤柱对微污染地下水具有良好的净化效果,其中,Fe的高效去除区间在滤层上部,Mn和有机物可以实现同层去除,高效去除区间在滤层中下部;当进水有机物浓度较高时,沿程的溶解氧浓度会逐渐降低,导致对CODMn和Mn的去除效果变差,此时应考虑在滤层中部或底部增加曝气来提高溶解氧。
Domestic sewage was added into aerated groundwater with high concentration of Fe and Mn to simulate micro-polluted groundwater, and the removal efficiency of pollutants was investigated in a biofiher column with height of 2.7 m, internal diameter of 60 mm and filtration velocity of 6 m/h and filled with mature manganese sand. Organism cuhivation process and the removal rule of pollutants under different filtration rates were studied. The results indicate that the biofiher column has a good purification efficiency of micro-polluted groundwater. Fe is removed in the upper part of the biofilter column effectively, Mn and organics are both removed in the middle and lower parts effectively. DO concentration is reduced when the influent organic concentration is higher. As a result, the removal efficiencies of CODMn and Mn become poor. In this situation, aeration should be added in the middle or lower parts to improve DO.
出处
《中国给水排水》
CAS
CSCD
北大核心
2011年第21期5-7,共3页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2009ZX07424-005-03)
关键词
生物滤池
除铁除锰
微污染地下水
biofilter
iron and manganese removal
micro-polluted groundwater
