Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan; Center for Regional Environmental Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
Department of Civil and Environmental Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
Bioresour Technol. 2014;152:93-100. doi: 10.1016/j.biortech.2013.10.106. Epub 2013 Nov 7.
A sixth-generation down-flow hanging sponge reactor (DHS-G6), using rigid sponge media, was developed as a novel aerobic post-treatment unit for upflow anaerobic sludge blanket (UASB) treating municipal sewage. The rigid sponge media were manufactured by copolymerizing polyurethane with epoxy resin. The UASB and DHS system had a hydraulic retention time (HRT) of 10.6 h (8.6 h for UASB and 2 h for DHS) when operated at 10-28 °C. The system gave reasonable organic and nitrogen removal efficiencies. The final effluent had a total biochemical oxygen demand of only 12 mg/L and a total Kjeldahl nitrogen content of 6 mg/L. The DHS reactor gave particularly good nitrification performance, which was attributed to the new rigid sponge media. The sponge media helped to provide a sufficient HRT, and retained a high biomass concentration, extending the solids retention time. The DHS reactor maintained a high dissolved oxygen concentration under natural ventilation.
一种第六代下流式悬挂式海绵反应器（DHS-G6），采用刚性海绵介质，作为上流式厌氧污泥床（UASB）处理城市污水的新型好氧后处理单元。刚性海绵介质是通过聚氨酯与环氧树脂共聚制造的。UASB 和 DHS 系统在 10-28°C 下运行时水力停留时间（HRT）为 10.6 小时（UASB 为 8.6 小时，DHS 为 2 小时）。该系统具有合理的有机物和氮去除效率。最终出水的总生化需氧量仅为 12mg/L，总凯氏氮含量为 6mg/L。DHS 反应器的硝化性能特别好，这要归功于新型的刚性海绵介质。海绵介质有助于提供足够的 HRT，并保持高生物量浓度，延长固体停留时间。DHS 反应器在自然通风下保持高溶解氧浓度。
