【摘要】 为了提高生物砂滤池的除污能力，采用复合金属对石英砂（QS）表面进行改性，以模拟污水厂尾水为处理对象，考察改性石英砂滤池挂膜启动过程中的除污效果以及运行稳定后的生物量。结果表明，氧化铁改性砂（FS）、铁锰改性砂（FMS）和铁锌改性砂（FZS）表面均形成了不同形态金属氧化物层的次生结构，更有利于微生物的附着增殖；各滤池启动后，对浊度的去除效果历时5d基本达到稳定，对COD的去除效果历时19～24 d达到稳定，对NH₄⁺-N的去除效果达到稳定较COD滞后2～4 d；挂膜成功后，3种改性石英砂滤池对COD和NH₄⁺-N的去除率均较普通石英砂滤池有所提高，其中FZS滤池的处理效果最好，对COD、NH₄⁺-N和浊度的平均去除率分别为54.2%、89.9%和88.2%;QS、FS、FMS和FZS滤池的平均生物量分别为6.47、7.43、8.31和8.92 mg/g，其中FZS滤池生物膜的EPS含量最高，微生物在其表面的成膜速率及生物膜的稳定性最好。更多还原

【Abstract】 5The surface of quartz sand（QS） was modified with composite metals to enhance the pollutants removal capability of biological sand filters. The pollutants removal efficiency of modified quartz sand filters during the start-up phase, as well as the biomass after stable operation were examined,using simulated wastewater treatment plant effluent as the treatment medium. The surfaces of iron oxide modified sand（FS）, iron-manganese modified sand（FMS）, and iron-zinc modified sand（FZS） all developed secondary structures comprising distinct metal oxide layers, which significantly enhanced the adhesion and proliferation of microorganisms. Following the start-up of each filter, the turbidity removal efficiency stabilized within approximately 5 days. The COD removal efficiency reached a steady state after 19-24 days. The steady-state removal efficiency of NH₄⁺-N exhibited a lag of 2-4 days relative to that of COD. After the successful biofilm formation, the removal efficiencies of COD and NH₄⁺-N in the three modified quartz sand filters were significantly enhanced compared to those in conventional quartz sand filter. Notably, the FZS filter demonstrated the most effective treatment performance, achieving average removal efficiencies of 54.2% for COD, 89.9% for NH₄⁺-N, and 88.2% for turbidity. The average biomass of the QS, FS, FMS, and FZS filters was 6.47 mg/g, 7.43 mg/g, 8.31 mg/g, and 8.92 mg/g, respectively.Notably, the biofilm from the FZS filter exhibited the highest extracellular polymeric substances（EPS）content, which contributed to superior biofilm formation rate and enhanced biofilm stability on its surface.更多还原