Center for Environmental Technology Research, Korea Institute of Science and Technology, 39-1 Hawolgok-Dong, Seongbuk-Gu, Seoul 136-791, Republic of Korea.
Water Sci Technol. 2009;60(9):2365-71. doi: 10.2166/wst.2009.133.
Biofilm and granule reactors were employed to remove nitrogen via an anammox reaction applying synthetic nitrogen wastewater, whose concentration was in the range of 20 to 1,400 mg N/L as total nitrogen. A biofilm reactor was packed with non-woven fabric and a granule reactor was filled with anaerobic granular sludge taken from the brewery wastewater treatment plant. Both reactors were seeded with Planctomycetes KSU-1 and operated for 450 days. The biofilm reactor showed high NH(4) (+)-N and NO(2) (-)-N removal efficiencies of over 88% and 94%, respectively, until total nitrogen concentration was reached at 800 mg N/L. However, the biofilm reactor showed severe inhibition at over 1,000 mg N/L of total nitrogen due to nitrogen overloading. The granule reactor revealed better nitrogen removal performance than the biofilm reactor, showing high NH(4) (+)-N and NO(2) (-)-N removal efficiencies of over 90%, even at a total nitrogen concentration of 1,400 mg N/L. However, aggregation of anammox bacteria grown in the sludge bed after long-term operation resulted in the deterioration of nitrogen. The removal ratio of NH(4) (+)-N and NO(2) (-)-N was close to 1:1, suggesting other reactions related to ammonium oxidation could occur simultaneously. Free ammonia inhibition as well as NO(2) (-)-N could be significant when high-strength nitrogenous wastewater was applied.
采用生物膜和颗粒反应器，通过厌氧氨氧化反应去除合成含氮废水中的氮，其浓度范围为 20 至 1400mg/L 总氮。生物膜反应器中填充无纺纤维，颗粒反应器中填充来自啤酒废水处理厂的厌氧颗粒污泥。两个反应器均接种 Planctomycetes KSU-1，并运行了 450 天。生物膜反应器对 NH4 (+)-N 和 NO2 (-)-N 的去除效率分别超过 88%和 94%，直到总氮浓度达到 800mg/L。然而，由于氮负荷过高，生物膜反应器在总氮超过 1000mg/L 时表现出严重的抑制作用。颗粒反应器的氮去除性能优于生物膜反应器，即使在总氮浓度为 1400mg/L 的情况下，也能保持高的 NH4 (+)-N 和 NO2 (-)-N 去除效率，超过 90%。然而，在长期运行后，生长在污泥床中的厌氧氨氧化菌发生聚集，导致氮的恶化。NH4 (+)-N 和 NO2 (-)-N 的去除比例接近 1:1，表明可能同时发生与铵氧化有关的其他反应。当应用高强度含氮废水时，游离氨抑制和 NO2 (-)-N 可能会很显著。
