沸石粉基聚氨酯海绵作为移动床生物膜反应器中的生物载体，用于提高城市污水的脱氮效果。
Zeolite powder based polyurethane sponges as biocarriers in moving bed biofilm reactor for improving nitrogen removal of municipal wastewater.
机构信息
Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Environmental and Municipal Engineering, Tianjin Chengjian University, China and School of Civil and Environmental Engineering, University of Technology Sydney, Australia; Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China.
Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Environmental and Municipal Engineering, Tianjin Chengjian University, China and School of Civil and Environmental Engineering, University of Technology Sydney, Australia; Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China.
出版信息
Sci Total Environ. 2019 Feb 15;651(Pt 1):1078-1086. doi: 10.1016/j.scitotenv.2018.09.173. Epub 2018 Sep 13.
This study aims to enhance nitrogen removal efficiency of a moving bed biofilm reactor (MBBR) by developing a new MBBR with zeolite powder-based polyurethane sponges as biocarriers (Z-MBBR). Results indicated the total nitrogen (TN) removal efficiency and simultaneous nitrification and denitrification (SND) performance in Z-MBBR were nearly 10% higher than those in the conventional MBBR with sponges as biocarriers (S-MBBR). About 84.2 ± 4.8% of TN was removed in Z-MBBR compared to 75.1 ± 6.8% in S-MBBR. Correspondingly, the SND performance in Z-MBBR and S-MBBR was 90.7 ± 4.1% and 81.7 ± 6.5%, respectively. The amount of biofilm attached to new biocarriers (0.470 ± 0.131 g/g carrier) was 1.3 times more than that of sponge carriers (0.355 ± 0.099 g/g carrier). Based on the microelectrode measurements and microbial community analysis, more denitrifying bacteria existed in the Z-MBBR system, and this can improve the SND performance. Consequently, this new Z-MBBR can be a promising option for a hybrid treatment system to better nitrogen removal from wastewater.
本研究旨在通过开发一种新型移动床生物膜反应器（MBBR），以沸石粉末为基础的聚氨酯海绵作为生物载体（Z-MBBR），提高 MBBR 的脱氮效率。结果表明，Z-MBBR 的总氮（TN）去除效率和同时硝化反硝化（SND）性能比传统的以海绵为生物载体的 MBBR（S-MBBR）高近 10%。Z-MBBR 中约有 84.2±4.8%的 TN 被去除，而 S-MBBR 中只有 75.1±6.8%。相应地，Z-MBBR 和 S-MBBR 的 SND 性能分别为 90.7±4.1%和 81.7±6.5%。新型生物载体上附着的生物膜量（0.470±0.131 g/g 载体）比海绵载体（0.355±0.099 g/g 载体）多 1.3 倍。基于微电极测量和微生物群落分析，Z-MBBR 系统中存在更多的反硝化细菌，这可以提高 SND 性能。因此，这种新型 Z-MBBR 可以成为混合处理系统的一个有前途的选择，以更好地从废水中去除氮。
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