为探讨饮用水生物滤池对NH4＋-N去除和“氮亏损”现象的影响因素，测定生物滤池进出水中NH4＋-N，NO2--N， NO3--N等指标.结果表明，陶粒生物滤池对NH4＋-N的去除率从14．97％到60．99％，活性炭生物滤池对NH4＋-N的去除率从16．59％到83．02％；陶粒和活性炭滤池对NH4＋-N的去除率都随着流速的增加而降低；陶粒滤池内NH4＋-N的去除率随着气水比和C∶N的增加而先增加后下降；NH4＋-N的去除率在活性炭滤池内随C∶N的增加而降低，气∶水的增加而增加；气∶水对两种生物滤池中NH4＋-N去除的影响最大.陶粒生物滤池氮亏损的量从0．10 mg/L到0．70 mg/L，活性炭生物滤池氮亏损量从0．11 mg/L到1．01 mg/L；氮亏损量随着流速增加而降低，随着气水比增加而增加，随着C∶N的增加而先下降后增加；气水比对陶粒和活性炭生物滤池的氮亏损量影响最大.%In order to explore the impacting factors of NH4+-N removal and“nitrogen loss” in drinking biofilter, water quality parameters,such as NH4+-N,NO2--N,NO3--N,and dissolved oxygen etc,were determined in inflow and outflow of biofilter. Removal of NH4+-N was increased from 14.97% to 60.99% in ceramic biofilter,and that in activated carbon biofilter was increased from 16.59% to 83.02%. NH4+-N removal was decreased with the increase of the flow rate in ceramic and activated carbon biofilter. Removal of NH4+-N in ceramic biofilter was first increased and then decreased with the ratio of air/water and C∶N. In activated carbon biofilter,NH4+-N removal was decreased with the ratio of C∶N and increased with the ratio of air/water. The ratio air/water has maximum impacting factor for removal of NH4+-N. Nitrogen losses increased from 0.10 mg/L to 0.70 mg/L in ceramic biofilter,and from 0.11 mg/L to 1.01 mg/L in activated carbon biofilter. The amount of nitrogen loss was decreased with the flow rate increase,and increased with the increase air-water ratio. Nitrogen loss first increased and then decreased with the ratio of C∶N. The ratio air/water has maximum impacting factor for nitrogen losses.
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