State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
Bioresour Technol. 2013 Sep;144:452-9. doi: 10.1016/j.biortech.2013.06.070. Epub 2013 Jun 28.
A lab-scale membrane diffusion packed-bed bioreactor was used to investigate hydrogenotrophic denitrification for tertiary nitrogen removal from municipal wastewater. After start-up, the bioreactor had been operated for 165 days by stepwise increasing influent loading rates at 30 and 15°C. The results indicated that this bioreactor could achieve relatively high nitrogen removal efficiencies. The denitrification rates reached 0.250 and 0.230 kg N/(m(3)d) at 30 and 15°C respectively. The total nitrogen concentration in effluent was entirely below 2.0 mg/L at the steady operation state. The average increase of total organic carbon in effluent was approximately 0.41 mg/L, suggesting the risk of organic residue can be completely controlled. Dissolved oxygen (DO) did not show obviously negative effects on hydrogenotrophic denitrification. There was only slight decrease of DO concentration in effluent, which demonstrated almost all of the hydrogen was used for nitrate reduction.
采用实验室规模的膜扩散填充床生物反应器，从城市废水中去除三级氮，研究氢营养型反硝化。启动后，生物反应器在 30 和 15°C 下通过逐步增加进水负荷运行了 165 天。结果表明，该生物反应器能够实现较高的脱氮效率。反硝化速率分别达到 0.250 和 0.230 kg N/(m3·d)。稳定运行状态下，出水的总氮浓度完全低于 2.0 mg/L。出水中总有机碳的平均增加量约为 0.41 mg/L，表明有机残留物的风险可以得到完全控制。溶解氧（DO）对氢营养型反硝化没有明显的负面影响。出水中 DO 浓度仅略有下降，这表明几乎所有的氢都被用于硝酸盐还原。
