低基质条件下厌氧氨氧化生物膜和颗粒污泥脱氮性能对比研究

摘要

Two reactors with different configurations were operated at low substrate concentration. One was the UASB reactor using sponge as carrier (bio-film reactor) and the other was filled with granular sludge. The results show that the granular reactor has a better nitrogen removal efficiency than the bio-film reactor when the NH4+-N and NO2---N mass concentrations of the influent are (17.03±2.16) mg/L and (19.17±2.33) mg/L, respectively. By maintaining the average removal efficiency of NH4+-N and NO2--N in the granular reactor over 90%, and shortening the hydraulic retention time (HRT) stepwise, the nitrogen removal rate of the granular reactor achieves 3.55 kg-N/(m3d), compared to 0.94 kgN/(m3d) of the bio-film reactor. Furthermore, the mass concentration of NO2 -N to NH4+-N in the influent has certain influence on the stoichiotnetry of the reactor.%在低基质质量浓度条件下,对海绵填料生物膜反应器和颗粒污泥反应器进行厌氧氨氧化的脱氮性能进行对比研究.研究结果表明:当进水NH4+-N和NO2--N质量浓度分别为(17.03±2.16) mg/L和(19.17±2.33) mg/L时,颗粒污泥厌氧氨氧化反应器的脱氮性能明显优于海绵填料生物膜反应器的脱氮性能;保持对NH4+-N和NO2--N的平均去除率为90％以上时,通过缩短水力停留时间,颗粒污泥反应器容积氮去除速率可达3.55 kg.N/(m3·d),而海绵填料生物膜反应器仅为0.94 kg·N/(m3·d);进水中NO2--N与NH4+-N的质量浓度比能影响反应器的化学计量关系.