School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, PR China.
School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, PR China.
Bioresour Technol. 2020 Sep;311:123559. doi: 10.1016/j.biortech.2020.123559. Epub 2020 May 19.
The effects of inorganic salts on partial denitrification (PD) was investigated in a sequencing batch reactor for simultaneously treating saline nitrate sewage and municipal wastewater. After 230-day operation, a high nitrate-to-nitrite transformation ratio (NTR) of ~ 80% was achieved with the salinity of 1.25 wt% and the initial chemical oxygen demand to nitrate ratio of 3.7. Microbial community analysis revealed that, Thauera was remained predominant in PD system but with a relative abundance decreasing from 53.02% (0.0 wt%) to 42.36% (1.25 wt%). Moreover, as a suitable ratio of nitrite to ammonia (~1.6) in effluent was obtained, it would be a promising method to treat saline nitrate sewage by combing PD with anammox.
采用序批式反应器同时处理含盐硝污水和城市污水，研究了无机盐对部分反硝化（PD）的影响。经过 230 天的运行，在 1.25wt%盐度和初始化学需氧量与硝酸盐比为 3.7 的条件下，硝酸盐到亚硝酸盐的转化率（NTR）达到了约 80%。微生物群落分析表明，PD 系统中仍以 Thauera 为主，但相对丰度从 53.02%（0.0wt%）下降到 42.36%（1.25wt%）。此外，由于获得了合适的亚硝酸盐与氨的比例（~1.6），因此 PD 与厌氧氨氧化相结合处理含盐硝污水是一种很有前途的方法。
