Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir's Eco-Environments, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, PR China.
Bioresour Technol. 2016 Sep;216:196-202. doi: 10.1016/j.biortech.2016.05.064. Epub 2016 May 21.
In this study, a simultaneous nitrogen removal system for high salinity and high nitrogen organic wastewater was developed in a pressurized biofilm reactor. The result showed that under the air supply rate of 200Lh(-1), salinity of 3.0±0.2%, organic load of 10kgCODm(-3)d(-1) and nitrogen loading of 0.185kgm(-3)d(-1), the reactor started up rapidly and performed stably after 30days operation. Meanwhile, a simultaneous COD and nitrogen removal was achieved in the single-stage reactor, with COD, NH4(+)-N and TN removal efficiency of 97%, 99% and 98%, respectively. Denaturing gradient gel electrophoresis profile demonstrated that simultaneous nitrogen removal could be achieved through heterotrophic nitrification-aerobic denitrification, and the pivotal microorganisms were Flavobacterium phragmitis and Paracoccus denitrificans. The microbial community of salt-tolerant halophilic microorganisms was developed successfully. This study can provide a more efficient and feasible solution to treat high salinity organic wastewater.
在这项研究中，在加压生物膜反应器中开发了用于高盐度和高氮有机废水的同时脱氮系统。结果表明，在供气率为 200Lh(-1)、盐度为 3.0±0.2%、有机负荷为 10kgCODm(-3)d(-1)和氮负荷为 0.185kgm(-3)d(-1)的条件下，反应器在 30 天的运行后迅速启动并稳定运行。同时，在单级反应器中实现了 COD 和氮的同时去除，COD、NH4(+)-N 和 TN 的去除效率分别为 97%、99%和 98%。变性梯度凝胶电泳图谱表明，通过异养硝化-好氧反硝化可以实现同步脱氮，关键微生物为黄杆菌属和脱氮副球菌。成功开发了耐盐嗜盐微生物的微生物群落。本研究可为处理高盐有机废水提供更高效、更可行的解决方案。
