State Key Laboratory of Applied Organic Chemistry, College of Resources and Environment, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, China E-mail:
Water Sci Technol. 2013;68(12):2613-8. doi: 10.2166/wst.2013.511.
In order to improve the TN removal efficiency on low carbon-to-nitrogen micro-polluted water, in this study, a layered biological aerated filter (L-BAF) was built. The results showed that the removal efficiency for CODMn, NH3-N, and TN was 71.6-90.3%, 99.8-99.9%, and 57.8-65.7%, respectively, when the C/N ratio was kept at 3 and the volumetric flow rate was 0.072 m(3) d(-1). The L-BAF could improve the TN removal efficiency by about 20% compared to a traditional process. The L-BAF and traditional process removal efficiency for NH3-N and CODMn were similar. The kinetic performance of the L-BAF indicated that the relationship of CODMn removal efficiency with the influent CODMn concentration could be described by ln(C/C0) = -(0.0023/Q0C0(0.9398))H.
为了提高低碳氮比微污染水中 TN 的去除效率，本研究构建了分层生物曝气滤池（L-BAF）。结果表明，当 C/N 比保持在 3，体积流量为 0.072 m³/d 时，CODMn、NH3-N 和 TN 的去除效率分别为 71.6-90.3%、99.8-99.9%和 57.8-65.7%。与传统工艺相比，L-BAF 可将 TN 去除效率提高约 20%。L-BAF 和传统工艺对 NH3-N 和 CODMn 的去除效率相似。L-BAF 的动力学性能表明，CODMn 去除效率与进水 CODMn 浓度的关系可用 ln(C/C0)=-(0.0023/Q0C0(0.9398))H 描述。
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