School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
Sci Total Environ. 2020 Dec 20;749:141489. doi: 10.1016/j.scitotenv.2020.141489. Epub 2020 Aug 4.
The biostimulation of a marine anammox bacteria (MAB)-dominated bioprocess with Co(II) was studied in a sequencing batch reactor (SBR) treating nitrogen-rich saline wastewater at 15 °C. The low Co(II) load of 0.0015 kgCo/(md) had little effect on the removal of nitrogen. The nitrite removal rate (NRR), ammonia removal rate (ARR), and specific anammox activity (SAA) reached 0.73 kg/(m·d), 0.59 kg/(m·d), and 0.23 kg/(kg·d), respectively, under the Co(II) load of 0.009 kgCo/(md). However, the loadings of Co(II) at 0.024-0.03 kgCo/(md) negatively affected the activity of MAB. Besides, the values of ΔNO-N/ΔNH-N (1.15-1.29) were lower than the theoretical ratio values (around 1.32) likely because of the marine commamox process. The removal of nitrogen from nitrogen-rich saline wastewater was achieved by the synergy between Candidatus Scalindua (27.11%) and Candidatus Kuenenia (9.55%). The nitrogen removal with Co(II) addition could be well described by a modified Logistic model.
采用序批式反应器（SBR）在 15°C 下处理富氮盐水废水，研究了 Co(II) 对海洋厌氧氨氧化菌（MAB）占主导地位的生物过程的生物刺激作用。低浓度的 Co(II)（0.0015 kgCo/(md)）对氮的去除影响不大。在 Co(II) 负荷为 0.009 kgCo/(md)时，亚硝酸盐去除率（NRR）、氨去除率（ARR）和特定厌氧氨氧化活性（SAA）分别达到 0.73 kg/(m·d)、0.59 kg/(m·d)和 0.23 kg/(kg·d)。然而，Co(II) 负荷在 0.024-0.03 kgCo/(md)时会对 MAB 的活性产生负面影响。此外，ΔNO-N/ΔNH-N（1.15-1.29）的值低于理论比值（约 1.32），这可能是由于海洋 commamox 过程的原因。富氮盐水废水中的氮通过 Candidatus Scalindua（27.11%）和 Candidatus Kuenenia（9.55%）的协同作用得以去除。添加 Co(II) 后氮的去除可以用改进的 Logistic 模型很好地描述。
