中试规模硝化滴滤池处理城市曝气塘出水的性能

Performance of a pilot-scale nitrifying trickling filter treating municipal aerated lagoon effluent.

作者信息

Coats Erik R, Watson Ben, Lee Kiersten, Hammer Matt

出版信息

Water Environ Res. 2015 Jan;87(1):35-43.

Abstract

Colfax, WA, operates an aerated lagoon to achieve compliance with its National Pollutant Discharge Elimination System (NPDES) permit, which currently requires biochemical oxygen demand (BOD) and total suspended solids (TSS) removal. However, ammonia removal may soon be required, and Colfax is considering a nitrifying trickling filter (NTF) that would allow them to also maintain the lagoons. To obtain data from which to ultimately design a full-scale system, a four-year NTF pilot study was performed. Results demonstrated that an NTF would be an effective, reliable NH3 removal method and could produce effluent NH3 concentrations < 1.0 mg/L. NTF performance was characterized by zero- and first-order kinetics; zero-order rates correlated with influent NH3 concentrations and mass load. Utilizing data from these investigations it was determined that the pilot NTF could be reduced by 19%, which demonstrates the value of pilot testing. Finally, pilot data was evaluated to provide a data set that will be useful to engineers designing full-scale NTFs.

摘要

华盛顿州科尔法克斯运营着一个曝气塘，以达到其国家污染物排放消除系统（NPDES）许可证的要求，该许可证目前要求去除生化需氧量（BOD）和总悬浮固体（TSS）。然而，不久后可能需要去除氨，科尔法克斯正在考虑采用硝化滴滤池（NTF），这也将使他们能够维持曝气塘的运行。为了获取最终设计全尺寸系统所需的数据，进行了一项为期四年的NTF中试研究。结果表明，NTF将是一种有效、可靠的氨去除方法，并且能够产生氨浓度低于1.0毫克/升的出水。NTF的性能通过零级和一级动力学来表征；零级速率与进水氨浓度和质量负荷相关。利用这些调查的数据确定，中试NTF的规模可以缩小19%，这证明了中试测试的价值。最后，对中试数据进行了评估，以提供一个对设计全尺寸NTF的工程师有用的数据集。